Details of the Researcher

PHOTO

Takayuki Narushima
Section
Graduate School of Engineering
Job title
Professor
Degree

  • 博士（工学）（東北大学）

Research History 7

  • 2023/04 - Present
    Research Center for Rare Earth and Green Innovation (RaMGI)　Director

  • 2007/04 - Present
    東北大学大学院工学研究科材料システム工学専攻　教授

  • 2004/06 - 2007/03
    東北大学先進医工学研究機構　教授

  • 1997/04 - 2004/06
    東北大学大学院工学研究科　助教授

  • 1998/03 - 1999/03
    カリフォルニア大学（文部省在外研究員）　リサーチフェロー

  • 1994/12 - 1997/03
    東北大学工学部　助教授

  • 1987/04 - 1994/11
    東北大学工学部　助手

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Education 2

  • Tohoku University　Graduate School, Division of Engineering　材料物性工学専攻

    - 1987/03/31

  • Tohoku University　Faculty of Engineering　金属工学科

    - 1985/03/31

Committee Memberships 34

  • The Iron and Steel Institute of Japan　Representative

    2024/04 - Present

  • National Council of Materials-Related Departments　Vice Chairman

    2022/04 - Present

  • The Japan Society of Titanium　vice president

    2021/04 - Present

  • The Japanese Society for Dental Materials and Devices　Tohoku Branch Delegate

    2018/04 - Present

  • International Organization Committee , World Conference of Titanium　Member (Japan)

    2015/08 - Present

  • JABEE Committee, The Iron and Steel Institute of Japan　Member

    2015/04 - Present

  • The Japan Titanium Society　Representative, Industry-university cooperation committee

    2010/04 - Present

  • The Japanese Society for Biomaterials　Trustee

    2006/04 - Present

  • The Japan Institute of Metals and Materials　Director

    2021/04 - 2023/03

  • The Japan Institute of Light Metals　The Journal of the Japan Institute of Light Metals, Editorial committee, Member

    2010/04 - 2023/03

  • The Japanese Society for Biomaterials　Director

    2012/04 - 2022/03

  • Japan Accreditation Board for Engineering Education　Director

    2019/04 - 2021/04

  • JABEE Committee, The Iron and Steel Institute of Japan　Chairman

    2018/04 - 2020/03

  • Japan Accreditation Board for Engineering Education　認定・審査調整委員会委員

    2018/04 - 2020/03

  • The Iron and Steel Institute of Japan　Director

    2018/04 - 2020/03

  • 軽金属学会研究委員会「チタンの準安定相・析出相研究部会」　部会長

    2015/06 - 2020/03

  • The Japan Institute of Light Metals　Chairman, Tohoku Branch

    2015/04 - 2019/03

  • Titanium Manufacturing Process and Materials Function Research Group, The Japan Institute of Metals and Materials　Representative

    2014/04 - 2019/03

  • JABEE Committee, The Iron and Steel Institute of Japan　Vice Chairman

    2016/04 - 2018/03

  • Bio and Healthcare Materials Division, The Japan Institute of Metals and Materials　Vice Chairman

    2015/04 - 2017/03

  • 次世代構造部材創製・加工技術開発 総合技術委員会　Member

    2013/10 - 2016/03

  • Bio and Healthcare Materials Division, The Japan Institute of Metals and Materials　Chairman

    2011/04 - 2015/03

  • The Japan Institute of Light Metals　Director

    2011/04 - 2015/03

  • Editorial Committee, The Japan Institute of Light Metals　Secretary, Editorial Committee

    2011/04 - 2015/03

  • Bio and Healthcare Materials Division, The Japan Institute of Metals and Materials　Vice Chairman

    2009/04 - 2011/03

  • 日本金属学会分科会　幹事

    2005/04 - 2009/03

  • 日本金属学会 会誌・欧文誌　編集委員

    2002/04 - 2006/03

  • 日本金属学会分科会　委員

    2003/04 - 2005/04

  • 日本金属学会 会報「まてりあ」　編集委員

    2003/04 - 2005/03

  • (社)日本鉄鋼協会　ノーベルプロセッシングフォーラム幹事

    2000/04 - 2003/03

  • (社)日本鉄鋼協会　東北支部幹事

    2000/04 - 2002/03

  • 日本セラミックス協会　JABEE対応学部カリキュラム小委員会委員

    2000/10 - 2001/03

  • 日本金属学会 会報「まてりあ」　編集委員

    1999/04 - 2001/03

  • 日本金属学会　まてりあ改革検討小委員会委員

    2003/06 -

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Professional Memberships 9

  • The Japan Titanium Society

    2012/04 - Present

  • The Minerals, Metals & Materials Society (TMS)

    2010/01 - Present

  • The Japanese Society of Dental Materials and Devices

    2007/04 - Present

  • The Japan Institute of Light Metals

    2007/04 - Present

  • The Japanese Society for Biomaterials

    2005/04 - Present

  • The Iron and Steel Institute of Japan

    1990/04 - Present

  • The American Ceramic Society

    1989/01 - Present

  • The Japan Institute of Metals and Materials

    1987/04 - Present

  • The Ceramic Society of Japan

    1987/01 - Present

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Research Interests 5

  • interfacial reaction

  • calcium phosphate

  • Co-Cr-Mo alloys

  • titanium alloys

  • biomaterials

Research Areas 4

  • Nanotechnology/Materials / Structural and functional materials /

  • Life sciences / Biomaterials /

  • Life sciences / Biomedical engineering /

  • Nanotechnology/Materials / Material fabrication and microstructure control /

Awards 37

  1. ポスター賞

    2019/12　第2回日本金属学会第7分野講演会「金属系バイオマテリアルサイエンスの新展開(II)」　実用歯科用チタン合金表面に作製した炭素・窒素含有TiO2膜の可視光応答性評価

  2. 優秀ポスター賞

    2019/10　日本バイオマテリアル学会東北ブロック　ステント用Co-Cr-W-Ni合金の結晶粒粒微細化と機械的特性

  3. 東北大学金属材料研究所共同研究ワークショップ・日本バイオマテリアル学会東北ブロック講演会 優秀ポスター賞

    2019/10　日本バイオマテリアル学会東北ブロック　二段階熱酸化によるチタンへの炭素・窒素含有TiO2膜の作製と可視光応答型光触媒活性

  4. 平成30年度軽金属希望の星賞

    2019/03　軽金属学会　二段階熱酸化法による実用Ti合金表面への光活性抗菌機能化TiO2膜作製と評価

  5. 東北大学金属材料研究所共同研究ワークショップ・日本バイオマテリアル学会東北ブロック講演会 優秀ポスター賞

    2018/08　日本バイオマテリアル学会東北ブロック　二段階熱酸化による歯科用Ti合金へのTiO2膜作製と抗菌能評価

  6. 東北大学金属材料研究所共同研究ワークショップ・日本バイオマテリアル学会東北ブロック講演会「バイオマテリアル研究 東北地区交流会」 優秀ポスター賞

    2017/09/26　バイオマテリアル研究 東北地区

  7. Poster Presentation Award

    2017/06/28　Joint Symposium on Materials Science and Engineering for the 21st Century

  8. Poster Presentation Award

    2017/03/21　2017 Annual Meeting of Excellent Graduate Schools for Materials Integration Center and Materials Science Center

  9. Poster Presentation Award

    2016/03/19　2016 Japan-Russia Joint Seminar “Advanced Materials Synthesis Process and Nanostructure” in conjunction with 2015 Annual Meeting of Excellent Graduate Schools for “Materials Integration Center” and “Materials Science Center”

  10. 優秀ポスター賞

    2015/09　日本金属学会

  11. 優秀ポスター発表賞

    2015/05　軽金属学会

  12. Best Oral Presentation

    2014/11　Bioceramics26

  13. 優秀ポスター賞

    2014/09　日本金属学会

  14. Award of the 2nd poster presentation prize

    2014/09　6th International Workshop on Advanced Ceramics

  15. Light Metal R&D Furtherance Medal

    2014/05/17　（一社）軽金属学会

  16. Outstanding Presentation Award

    2013/12　International Symposium on Eco Topia Science 2013(ISETS13)

  17. 優秀講演発表賞

    2013/05　粉体粉末冶金協会

  18. 日本セラミックス協会東海支部学術研究発表会 優秀発表賞

    2012/12　日本セラミックス協会東海支部

  19. The 29th Japan Titanium Society Meritorious Award

    2012/11/19　日本チタン協会

  20. ISAEM2012 Best Poster Presentation

    2012/11/06　ISAEM-2012

  21. Best Poster Award

    2009/12　KINKEN-WAKATE2009

  22. 第8回日本金属学会東北支部研究発表大会 奨励賞

    2009/12　日本金属学会東北支部

  23. Best Presentation Award

    2009/09　Interdisciplinary Science of Nanomaterials

  24. ISAEM-2008 Best Poster Presentation

    2008/11　ISAEM-2008

  25. 第10回日本金属学会優秀ポスター賞

    2008/03/26　日本金属学会

  26. 第66回日本金属学会功績賞

    2008/03/26　(社)日本金属学会　材料化学部門

  27. 第６回軽金属躍進賞

    2007/11/10　(社)軽金属学会　軽金属に関する学術研究および技術開発

  28. 第6回日本金属学会東北支部研究発表大会 ポスター優秀賞

    2007/11　日本金属学会東北支部

  29. 第一回東北大学金属材料研究所附属金属ガラス総合研究センター共同利用研究最優秀賞

    2007/05/21　東北大学金属材料研究所附属金属ガラス総合研究センター

  30. 平成19年度学術記念賞（西山記念賞）

    2007/03/27　(社)日本鉄鋼協会　材料製造プロセスの基礎的研究

  31. 傾斜機能材料研究会2006年度研究奨励賞

    2006/06　傾斜機能材料研究会

  32. 第5回日本金属学会優秀ポスター賞

    2005/09　日本金属学会

  33. 第1回日本金属学会優秀ポスター賞

    2003/10　日本金属学会

  34. 第5回金属学会奨励賞

    1995/12　(社)日本金属学会　新素材の高温における物理化学

  35. 第65回工学研究奨励賞

    1995/10　(財)服部報公会　ラマン分光法により高温酸化皮膜形成過程のその座観察

  36. 第34回原田研究奨励賞

    1994/07　(財)金属研究助成会　シリコン其セラミックスの高温酸化

  37. 第15回本多記念研究奨励賞

    1994/02　(財)本多記念会　シリコン其セラミックスの高温酸化

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Papers 272

  1. Removal of oxygen from commercially pure titanium melt via a two-step plasma-arc Melting process using hydrogen Peer-reviewed

    R. Abe, K. Ueda, T. Narushima

    Mater. Trans.　66　(12)　2025/12

  2. Citric acid-assisted sol–gel synthesis of highly reactive borate-based bioactive glass powders Peer-reviewed

    Jun Rey Sullano Lincuna, Kyosuke Ueda, Takayuki Narushima

    Journal of Non-Crystalline Solids　666　123637-123637　2025/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.jnoncrysol.2025.123637 　

    ISSN： 0022-3093

  3. Formation of unique heterogeneous microstructure in biomedical Co-Cr-W-Ni-C alloys by mechanical milling and heat treatment processes Peer-reviewed

    Kosuke Ueki, Yuta Mizutani, Tomoki Nakajima, Kyosuke Ueda, Takayuki Narushima, Masaaki Nakai

    Journal of Alloys and Compounds　1036　181631-181631　2025/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.jallcom.2025.181631 　

    ISSN： 0925-8388

  4. Co-Cr-W-Pt alloys with high X-ray visibility for next-generation balloon-expandable stents Peer-reviewed

    Tomoki Nakajima, Yuri Ito, Kosuke Ueki, Tomokazu Numano, Kyosuke Ueda, Takayuki Narushima

    Materials Science and Engineering: A　931　148216-148216　2025/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.msea.2025.148216 　

    ISSN： 0921-5093

  5. Antibacterial functionalized surface treatment of titanium with bio-ceramics Invited

    K. Ueda, T. Narushima, R. Sahara

    J. Jpn. Soc. Biomat.　43　(2)　128-133　2025/04

  6. Recent research and development in the processing, microstructure, and properties of titanium and its alloy Invited Peer-reviewed

    M. Niinomi, T. Narushima, T. Nakano

    Mater. Trans.　65　(12)　1600-1611　2024/12

    DOI： 10.2320/matertrans.MT-M2024082 　

  7. Antibacterial properties of TiO2 layers formed by Au-sputtering and thermal oxidation of titanium under visible light Peer-reviewed

    T. Ueda, R. Koizumi, K. Ueda, K. Ito, K. Ogasawara, H. Kanetaka, T. Narushima

    J. Jpn. Inst. Metals and Mater.　88　(12)　314-323　2024/12

    DOI： 10.2320/jinstmet.JC202405 　

  8. Recent research and development activities on titanium in Japan Invited Peer-reviewed

    T. Narushima, T. Hirose

    Proc. the 15th World Conference on Titanium (Ti-2023)　11-18　2024/10

  9. Exceptional balance of strength and ductility in biomedical Co–Cr–W–Ni alloy with added carbon Peer-reviewed

    Sukma Suci Friandani, Kai Hiyama, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima

    Materials Science and Engineering: A　908　146722-146722　2024/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.msea.2024.146722 　

    ISSN： 0921-5093

  10. Probing plastic deformation-related properties in static recrystallized Co–Cr–Fe–Ni–Mo alloy for biomedical applications Peer-reviewed

    Kai Hiyama, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima

    Materials Science and Engineering: A　899　146458-146458　2024/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.msea.2024.146458 　

    ISSN： 0921-5093

  11. Systematic study on the microstructures of biomedical Co-20Cr-15W-10Ni alloys with carbon contents ranging from 0 to 0.2 mass pct Peer-reviewed

    S.S. Friandani, K. Ueda, T. Narushima

    Metall. Mater. Trans. A　55　1011-1024　2024/03

    DOI： 10.1007/s11661-024-07300-3 　

  12. Improvement of Work-Hardening Behavior of Co-Cr-W-Ni Alloy by Adding Mn/Fe for Balloon-Expandable Stents Peer-reviewed

    Kosuke Ueki, Kyosuke Ueda, Masaaki Nakai, Takayoshi Nakano, Takayuki Narushima

    Key Engineering Materials　967　115-120　2023/12/05

    Publisher: Trans Tech Publications, Ltd.

    DOI： 10.4028/p-ervq7v 　

    eISSN： 1662-9795

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    The Co-20Cr-15W-10Ni (CCWN, mass%) alloy, registered as American society of testing and materials (ASTM) F90, has been widely used as a balloon-expandable stent because of its excellent balance between its mechanical properties and corrosion resistance. To realize a less invasive stent placement, the stent diameter must be reduced, which implies that the stent strut thickness must be reduced. As such, the CCWN alloy must be high in strength and ductility while maintaining a low yield stress to facilitate the expansion and suppression of stent recoil. In this study, we focus on the effects of the adding Mn/Fe on the microstructure, mechanical properties, and corrosive properties of CCWN alloys. A 6 mass% Mn-added CCWN alloy with a grain size of approximately 20 μm prepared in this study exhibits excellent balance between tensile strength and ductility. In addition, it exhibits a lower yield stress while maintaining a high tensile strength compared with the ASTM F90 alloy. Meanwhile, a 6 mass% Fe-added CCWN alloy exhibits a higher ductility compared with the ASTM F90 alloy. The addition of Mn or Fe to the CCWN alloy increases the stacking fault energy of the alloy and suppresses strain-induced martensitic transformation during plastic deformation, thus improving the ductility of the alloy. Results of polarization tests show that the 6 mass% Mn-or Fe-added CCWN alloys exhibit the same corrosion current density as the ASTM F90 alloy. Mn-added Co-Cr-W-Ni alloys are suitable for use in balloon-expandable stents.

  13. Visible-light antibacterial activity of carbon and nitrogen co-doped rutile TiO2 films Invited Peer-reviewed

    R. Koizumi, K. Ueda, K. Ito, K. Ogasawara, H. Kanetaka, T. Mokudai, T. Narushima

    Thin Solid Films　780　139944　2023/08

    DOI： 10.1016/j.tsf.2023.139944 　

  14. Electronic structure analysis of light-element-doped anatase TiO2 using all-electron GW approach Peer-reviewed

    T. Ishikawa, R. Sahara, K. Ohno, K. Ueda, T. Narushima

    Comput. Mater. Sci.　220　112059　2023/02

    DOI： 10.1016/j.commatsci.2023.112059 　

  15. Special Issue on Recent Research and Development in the Processing, Microstructure, and Properties of Titanium and Its Alloys

    Mitsuo Niinomi, Masahiko Ikeda, Yoko Yamabe-Mitarai, Hideki Hosoda, Takuya Ishimoto, Sengo Kobayashi, Takao Hanawa, Takayuki Narushima, Takayoshi Nakano

    Materials Transactions　64　(1)　1　2023

    DOI： 10.2320/matertrans.MPR2023901 　

    ISSN： 1345-9678

  16. Improvement of mechanical properties of Co–Cr–W–Ni alloy tube suitable for balloon-expandable stent applications through heat treatment Peer-reviewed

    Shunsei Takeda, Kosuke Ueki, Kyosuke Ueda, Masaaki Nakai, Takayoshi Nakano, Takayuki Narushima

    Materials Science and Engineering: A　862　144505-144505　2023/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.msea.2022.144505 　

    ISSN： 0921-5093

  17. Effect of niobium and oxygen contents on microstructure and mechanical properties of α+β-type Ti-(5–25)Nb-(0.5–1)O (mass%) alloys for biomedical applications Peer-reviewed

    K. Ueda, M. Omiya, K. Kato, H. Kanetaka, T. Narushima

    Mater. Trans.　64　(1)　138-146　2023/01

    DOI： 10.2320/matertrans.MT-MLA2022020 　

  18. Antibacterial properties of TiO2 layers formed by Au-sputtering and thermal oxidation of titanium under visible light Peer-reviewed

    T. Ueda, R. Koizumi, K. Ueda, K. Ito, K. Ogasawara, H. Kanetaka, T. Narushima

    Mater. Trans.　63　(12)　155-164　2023/01

    DOI： 10.2320/matertrans.MT-MLA2022006 　

    ISSN： 1345-9678

  19. Tough yet flexible superelastic alloys meet biomedical needs Invited Peer-reviewed

    X. Xu, T. Odaira, S. Xu, K. Hirata, T. Omori, K. Ueki, K. Ueda, T. Narushima, M. Nagasako, R. Kainuma, S. Harjo, T. Kawasaki, L. Bodnárová, P. Sedlák, H. Seiner

    Advanced Materials & Processes　180　(7)　35-37　2022/10

    ISSN： 0882-7958

    eISSN： 2161-9425

  20. Flexible and Tough Superelastic Co–Cr Alloys for Biomedical Applications International-journal Peer-reviewed

    Takumi Odaira, Sheng Xu, Kenji Hirata, Xiao Xu, Toshihiro Omori, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima, Makoto Nagasako, Stefanus Harjo, Takuro Kawasaki, Lucie Bodnárová, Petr Sedlák, Hanuš Seiner, Ryosuke Kainuma

    Advanced Materials　34　(27)　2202305-2202305　2022/07

    Publisher: Wiley

    DOI： 10.1002/adma.202202305 　

    ISSN： 0935-9648

    eISSN： 1521-4095

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    The demand for biomaterials has been increasing along with the increase in the population of elderly people worldwide. The mechanical properties and high wear resistance of metallic biomaterials make them well-suited for use as substitutes or as support for damaged hard tissues. However, unless these biomaterials also have a low Young's modulus similar to that of human bones, bone atrophy inevitably occurs. Because a low Young's modulus is typically associated with poor wear resistance, it is difficult to realize a low Young's modulus and high wear resistance simultaneously. Also, the superelastic property of shape-memory alloys makes them suitable for biomedical applications, like vascular stents and guide wires. However, due to the low recoverable strain of conventional biocompatible shape-memory alloys, the demand for a new alloy system is high. The novel body-centered-cubic cobalt-chromium-based alloys in this work provide a solution to both of these problems. The Young's modulus of <001>-oriented single-crystal cobalt-chromium-based alloys is 10-30 GPa, which is similar to that of human bone, and they also demonstrate high wear and corrosion resistance. They also exhibit superelasticity with a huge recoverable strain up to 17.0%. For these reasons, the novel cobalt-chromium-based alloys can be promising candidates for biomedical applications.

  21. Analysis of the oxidation and nitridation of Ti-17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr) alloys with added Si in atmospheric heating Peer-reviewed

    Narushima, S. Suzuki, K. Ueda, S.K. Bhattacharya, R. Sahara

    ISIJ Int.　62　(7)　1512-1521　2022/07

    DOI： 10.2355/isijinternational.ISIJINT-2022-053 　

  22. Electronegativity difference as a descriptor for oxidation inhibiting effect of alloying element during early stages of titanium oxidation International-journal International-coauthorship Peer-reviewed

    K. Kohli, S. Bhattacharya, K. Ueda, T. Narushima, R. Sahara, P. Ghosh

    Langmuir　38　(4)　1448-1457　2022/01

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.langmuir.1c02633 　

    ISSN： 0743-7463

    eISSN： 1520-5827

  23. Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents Peer-reviewed

    Soh Yanagihara, Kosuke Ueki, Kyosuke Ueda, Masaaki Nakai, Takayoshi Nakano, Takayuki Narushima

    Metallurgical and Materials Transactions A　52　(9)　4137-4145　2021/07/07

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s11661-021-06374-7 　

    ISSN： 1073-5623

    eISSN： 1543-1940

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    <title>Abstract</title>This is the first report presenting the development of a Co–Cr–W–Ni–Mn alloy by adding 6 mass pct Mn to ASTM F90 Co–20Cr–15W–10Ni (CCWN, mass pct) alloy for use as balloon-expandable stents with an excellent balance of mechanical properties and corrosion resistance. The effects of Mn addition on the microstructures as well as the mechanical and corrosion properties were investigated after hot forging, solution treatment, swaging, and static recrystallization. The Mn-added alloy with a grain size of ~ 20 <italic>µ</italic>m (recrystallization condition: 1523 K, 150 seconds) exhibited an ultimate tensile strength of 1131 MPa, 0.2 pct proof stress of 535 MPa, and plastic elongation of 66 pct. Additionally, it exhibited higher ductility and lower yield stress while maintaining high strength compared to the ASTM F90 CCWN alloy. The formation of intersecting stacking faults was suppressed by increasing the stacking fault energy (SFE) with Mn addition, resulting in a lower yield stress. The low-yield stress is effective in suppressing stent recoil. In addition, strain-induced martensitic transformation during plastic deformation was suppressed by increasing the SFE, thereby improving the ductility. The Mn-added alloys also exhibited good corrosion resistance, similar to the ASTM F90 CCWN alloy. Mn-added Co–Cr–W–Ni alloys are suitable for use as balloon-expandable stents.

  24. Effect of Precursor Deficiency Induced Ca/P Ratio on Antibacterial and Osteoblast Adhesion Properties of Ag-Incorporated Hydroxyapatite: Reducing Ag Toxicity Peer-reviewed

    Ozkan Gokcekaya, Celaletdin Ergun, Thomas J. Webster, Abdurrahman Bahadir, Kyosuke Ueda, Takayuki Narushima, Takayoshi Nakano

    Materials　14　(12)　3158-3158　2021/06/08

    Publisher: MDPI AG

    DOI： 10.3390/ma14123158 　

    eISSN： 1996-1944

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    Ag-containing hydroxyapatite (HA) can reduce risks associated with bacterial infections which may eventually require additional surgical operations to retrieve a failed implant. The biological properties of HA in such applications are strongly affected by its composition in terms of dopants as well as Ca/P stoichiometry, which can be easily controlled by altering processing parameters, such as precursor concentrations. The objective of this in vitro study was to understand the effect of variations in HA precursor solutions on antibacterial properties againstEscherichia coli(E. coli) and for promoting osteoblast (bone-forming cell) adhesion on Ag incorporated HA (AgHA) which has not yet been investigated. For this, two groups of AgHAs were synthesized via a precipitation method by adjusting precursor reactants with a stoichiometric value of 1.67, being either (Ca + Ag)/P (Ca-deficient) or Ca/(P + Ag) (P-deficient), and were characterized by XRD, FTIR, and SEM-EDS. Results showed that Ag+ incorporated into the Ca2+ sites was associated with a corresponding OH− vacancy. Additional incorporation of CO32− into PO43− sites occurred specifically for the P-deficient AgHAs. While antibacterial properties increased, osteoblast adhesion decreased with increasing Ag content for the Ca-deficient AgHAs, as anticipated. In contrast, significant antibacterial properties with good osteoblast behavior were observed on the P-deficient AgHAs even with a lower Ag content, owing to carbonated HA. Thus, this showed that by synthesizing AgHA using P-deficient precursors with carbonate substitution, one can keep the antibacterial properties of Ag in HA while reducing its toxic effect on osteoblasts.

  25. Unique crystallographic texture formation in Inconel 718 by laser powder bed fusion and its effect on mechanical anisotropy Peer-reviewed

    O. Gokcekaya, T. Ishimoto, S. Hibino, J. Yasutomi, T. Narushima, T. Nakano

    Acta Mater.　212　116876　2021/04

    DOI： 10.1016/j.actamat.2021.116876 　

    ISSN： 1359-6454

  26. Improvement of mechanical properties relating to microstructure for biomedical Co–Cr–W–Ni alloys with addition of Mn and Si Peer-reviewed

    K. Ueki, S. Yanagihara, K. Ueda, M. Nakai, T. Nakano, T. Narushima

    Mater. Trans.　62　(2)　229-238　2021/02

    Publisher: Japan Institute of Metals

    DOI： 10.2320/matertrans.MT-M2020300 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  27. Improvement of Strength and Ductility by Combining Static Recrystallization and Unique Heat Treatment in Co-20Cr-15W-10Ni Alloy for Stent Application

    Kosuke Ueki, Soh Yanagihara, Kyosuke Ueda, Masaaki Nakai, Takayoshi Nakano, Takayuki Narushima

    Materials Science Forum　1016　1503-1509　2021/01

    Publisher: Trans Tech Publications, Ltd.

    DOI： 10.4028/www.scientific.net/msf.1016.1503 　

    ISSN： 0255-5476

    eISSN： 1662-9752

  28. Effect of scan length on densification and crystallographic texture formation of pure chromium fabricated by laser powder bed fusion Peer-reviewed

    O. Gokcekaya, T. Ishimoto, T. Todo, R. Suganuma, R. Fukushima, T. Narushima, T. Nakano

    Crystals　11　(1)　9-14　2021/01

    DOI： 10.3390/cryst11010009 　

    eISSN： 2073-4352

  29. Formation of carbon-added anatase-rich TiO2 layers on titanium and their antibacterial properties in visible light International-journal Peer-reviewed

    Takatoshi Ueda, Naoki Sato, Ryusuke Koizumi, Kyosuke Ueda, Koyu Ito, Kouetsu Ogasawara, Takayuki Narushima

    Dental Materials　37　(2)　e37-e46　2021/01

    Publisher: Elsevier BV

    DOI： 10.1016/j.dental.2020.10.009 　

    ISSN： 0109-5641

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    OBJECTIVE: To avoid risk of infections associated with dental implants, thermal oxidation processes for practical dental Ti alloys were studied for both high bonding strength and antibacterial properties in visible light. METHODS: Two-step thermal oxidation, comprising carburization (first step of treatment: in Ar-1%CO gas) and subsequent oxidation (second step of treatment: in air), was conducted on commercially pure (CP) Ti, Ti-6Al-4V (Ti64), and Ti-6Al-7Nb (Ti67) alloys to form TiO2 layers. Their bonding strengths and antibacterial properties against Escherichia coli (E. coli) in visible light (λ ≥ 400 nm) were evaluated. RESULTS: TiO2 layers formed on each metal were composed of anatase and/or rutile. Anatase fraction and carbon concentration in the layers decreased with increasing temperature in the second step of treatment. Antibacterial properties of the TiO2 layers were dependent on the temperature in the second step of treatment. An approximate antibacterial activity value of 2 (killing ∼99% bacteria) was obtained when the temperatures in the second step of treatment were 673 and 773 K for CP Ti, 773 K for Ti64, and 773 and 873 K for Ti67. It was found that the TiO2 layer must contain carbon and be anatase-rich to exhibit excellent antibacterial properties. Bonding strength between the substrate and TiO2 layers formed at 773 K in the second step of treatment exceeded 80 MPa and was independent of substrate type. SIGNIFICANCE: TiO2 layers, possessing both high bonding strength and excellent antibacterial properties, were successfully formed on practical dental Ti alloys via two-step thermal oxidation.

  30. Recent activities of titanium research and development in Japan Invited Peer-reviewed

    Takayuki Narushima, Yasuaki Sugizaki

    MATEC Web of Conferences　321　01004-01004　2020/10/12

    Publisher: EDP Sciences

    DOI： 10.1051/matecconf/202032101004 　

    eISSN： 2261-236X

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    The research and development of Ti and its alloys as well as progress in Japan’s Ti industries and markets are described. Academic and industrial advances and activities over the past four years, since the 13th World Conference on Titanium held in San Diego, USA, are overviewed.

  31. Crystallographic orientation control of pure chromium via laser powder-bed fusion and improved high temperature oxidation resistance Peer-reviewed

    O. Gokcekaya, N. Hayashi, T. Ishimoto, K. Ueda, T. Narushima, T. Nakano

    Additive Manufacturing　36　101624-101624　2020/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.addma.2020.101624 　

    ISSN： 2214-8604

  32. Development of α+β-type biomedical Ti-Nb alloys with high oxygen content Peer-reviewed

    K. Ueda, M. Omiya, Y. Hirose, T. Narushima

    MATEC Web of Conferences　321　05003-05003　2020/10

    Publisher: EDP Sciences

    DOI： 10.1051/matecconf/202032105003 　

    eISSN： 2261-236X

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    Ti-(5–20)Nb-(0.5–1)O alloys (mass%) were investigated for developing low-cost biomedical α+β-type Ti alloy. Ti-(5, 10, 15, 20)Nb-(0.5, 0.75, 1)O alloys (mass%) were arc-melted and forged into bars. The forged alloy bars were heat-treated at 873 to 1373 K for 3.6 ks in an Ar atmosphere and quenched in iced water. β transus (<italic>T</italic>β) of the Ti-Nb-O alloys decreased with increasing Nb content. An increase in the oxygen content led to an increase in <italic>T</italic>β. After quenching, the formation of α′ martensite was observed in Ti-5Nb-<italic>y</italic>O alloys. An increase in the Nb content to 10 mass% led to the formation of α′ and α″ martensites. A further increase in the Nb content to 15 and 20mass% resulted in the formation of more α″ martensites. The boundary temperature for the formation of α′ and α″ martensite in the Ti-10Nb-<italic>y</italic>O alloys increased with increasing oxygen content, because oxygen enhances the Nb distribution to the β phase. The ultimate tensile strength of the Ti-<italic>x</italic>Nb-0.75O alloys heattreated to obtain the α-phase fraction (<italic>f</italic>α) of 0.5 was over 1000 MPa, except for the Ti-15Nb-0.75O alloy. The total elongation decreased with increasing Nb content. The Ti-5Nb-0.75O alloy exhibited excellent strength-ductility balance as a low-cost α+β-type biomedical Ti alloy.

  33. Fabrication and bioresorbability of Ag- and Ta-containing amorphous calcium phosphate films formed on titanium substrates by RF magnetron sputtering Peer-reviewed

    J. Wu, K. Ueda, T. Narushima

    MATEC Web of Conferences　321　05007-05007　2020/10

    Publisher: EDP Sciences

    DOI： 10.1051/matecconf/202032105007 　

    eISSN： 2261-236X

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    Silver (Ag)- and tantalum (Ta)-containing amorphous calcium phosphate (ACP) coating films were fabricated on titanium substrates by radiofrequency magnetron sputtering for biomedical applications. The sputtering targets were hot-pressed into 10 mol% Ag-containing ß-tricalcium phosphate sintered compacts with and without 8 mol% Ta. The fabricated ACP coating films were dense and smooth, with all elements distributed homogeneously along the depth direction. In addition, Ag existed as ions in the ACP regardless of the presence of Ta. The resorbability of the Ag-containing ACP coating films in simulated body fluids was suppressed by the addition of Ta. The concentration of detected Ag ions was higher in diluted nutrient broth solution than in Tris-HCl solution.

  34. Predicting the parabolic rate constants of high-temperature oxidation of Ti alloys using machine learning Peer-reviewed

    S.Kr. Bhattacharya, R. Sahara, T. Narushima

    Oxid. Met.　94　205-218　2020/06

    DOI： 10.1007/s11085-020-09986-3 　

  35. Fabrication of Ag and Ta co-doped amorphous calcium phosphate coating films by radiofrequency magnetron sputtering and their antibacterial activity Peer-reviewed

    Jun Wu, Kyosuke Ueda, Takayuki Narushima

    Materials Science and Engineering: C　109　110599-110599　2020/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.msec.2019.110599 　

    ISSN： 0928-4931

  36. Using HAADF-STEM for atomic-scale evaluation of incorporation of antibacterial Ag atoms in a β-tricalcium phosphate structure Peer-reviewed

    Ozkan Gokcekaya, Kyosuke Ueda, Takayuki Narushima, Takayoshi Nakano

    Nanoscale　12　(31)　16596-16604　2020

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d0nr04208k 　

    ISSN： 2040-3364

    eISSN： 2040-3372

  37. Precipitation during γ-ε phase transformation in biomedical co-cr-mo alloys fabricated by electron beam melting Peer-reviewed

    Kosuke Ueki, Motoka Kasamatsu, Kyosuke Ueda, Yuichiro Koizumi, Daixiu Wei, Akihiko Chiba, Takayuki Narushima

    Metals　10　(1)　71-1-13　2020/01

    DOI： 10.3390/met10010071 　

    eISSN： 2075-4701

  38. Overcoming the strength-ductility trade-off by the combination of static recrystallization and low-temperature heat treatment in Co-Cr-W-Ni alloy for stent application Peer-reviewed

    K. Ueki, S. Yanagihara, K. Ueda, M. Nakai, T. Nakano, T. Narushima

    Mat. Sci. Eng. A　766　2019/09

    DOI： 10.1016/j.msea.2019.138400 　

    ISSN： 0921-5093

    eISSN： 1873-4936

  39. Effect of nonmetallic inclusions on fatigue properties of superelastic Ti-Ni fine wire Peer-reviewed

    F. Yamashita, Y. Ide, S. Kato, K. Ueda, T. Narushima, S. Kise, K. Ishikawa, M. Nishida

    Metals　9　(9)　999　2019/09

    DOI： 10.3390/met9090999 　

    eISSN： 2075-4701

  40. Formation of photocatalytic active TiO2 layers on Ti-Nb alloys by two-step thermal oxidation Peer-reviewed

    S. Sado, T. Ueda, Y. Tokuda, N. Sato, K. Ueda, T. Narushima

    Mater. Trans.　60　(9)　1814-1820　2019/09

    DOI： 10.2320/matertrans.ME201901 　

  41. COX-2 Induces T cell accumulation and IFN-γ production during the development of chromium allergy Peer-reviewed

    R. Sitalaksmi, K. Ito, K. Ogasawara, Y. Suto, M. Itabashi, K. Ueda, N. Hirasawa, T. Narushima, S. Higuchi, N. Sato, N. Hendrijantini, U. Kresnoadi, K. Sasaki

    Autoimmunity　52　(5-6)　228-234　2019/08

    DOI： 10.1080/08916934.2019.1662404 　

    ISSN： 0891-6934

    eISSN： 1607-842X

  42. Deoxidation of Ti melt by newly developed two-step plasma arc melting process using hydrogen Peer-reviewed

    M. Watanabe, F. Sato, R. Abe, K. Ueda, D. Matsuwaka, F. Kudo, T. Narushima

    Metall. Mater. Trans. B　50　(4)　1553-1558　2019/08

    DOI： 10.1007/s11663-019-01608-x 　

  43. Visible-light-responsive antibacterial activity of Au-incorporated TiO2 layers formed on Ti-(0-10)at%Au alloys by air oxidation. International-journal Peer-reviewed

    Takatoshi Ueda, Kyosuke Ueda, Koyu Ito, Kouetsu Ogasawara, Hiroyasu Kanetaka, Takayuki Mokudai, Yoshimi Niwano, Takayuki Narushima

    Journal of biomedical materials research. Part A　107　(5)　991-1000　2019/05

    DOI： 10.1002/jbm.a.36624 　

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    Rutile TiO2 layers were formed on substrates of Ti-(0-10)at%Au alloys by a simple process of air oxidation, and their antibacterial activities were evaluated under visible-light irradiation (λ ≥ 400 nm). Au was introduced into the TiO2 layers on Ti-(1-10)at%Au alloys and existed as both metallic Au nanoparticles and dissolved Au3+ ions. The TiO2 layers that formed on Ti-5at%Au and Ti-10at%Au alloys exhibited visible-light photocatalytic activity, that is, degradation of stearic acid and antibacterial activity against Escherichia coli. These visible-light activities were attributed to the surface plasmon resonance of metallic Au nanoparticles and the decrease in bandgap energy caused by dissolved Au3+ ions. The formation of hydroxyl radicals observed under visible-light irradiation is attributable to antibacterial activity. From a cost perspective, a Ti-5at%Au alloy is more suitable as a substrate for the formation of a TiO2 layer with antibacterial properties than a Ti-10at%Au alloy. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 991-1000, 2019.

  44. Antibacterial activity of Ag nanoparticle-containing hydroxyapatite powders in simulated body fluids with Cl ions Peer-reviewed

    O. Gokcekaya, K. Ueda, K. Ogasawara, T. Narushima

    Mater. Chem. Phys.　223　473-478　2019/01

    DOI： 10.1016/j.matchemphys 　

  45. Experimental and theoretical study of the effect of Si on the oxidative behavior of Ti-6Al-4V alloys Peer-reviewed

    Kodai Maeda, Satoshi Suzuki, Kyosuke Ueda, Tomonori Kitashima, Somesh Kr. Bhattacharya, Ryoji Sahara, Takayuki Narushima

    J. Alloys Compd.　776　519-528　2019/01

    DOI： 10.1016/j.jallcom.2018.10.291 　

    ISSN： 0925-8388

  46. Synchronous improvement in strength and ductility of biomedical Co–Cr–Mo alloy by unique low-temperature heat treatment Peer-reviewed

    K. Ueki, M. Abe, K. Ueda, M. Nakai, T. Nakano, T. Narushima

    Mat. Sci. Eng. A　739　53-61　2019/01

    DOI： 10.1016/j.msea.2018.10.016 　

    ISSN： 0921-5093

    eISSN： 1873-4936

  47. Mechanism of oxidation of pure and Si-segregated α-Ti surfaces Peer-reviewed

    S. K. Bhattacharya, R. Sahara, S. Suzuki, K. Ueda, T. Narushima

    463　686-692　2019/01

    DOI： 10.1016/j.apsusc.2018.08.253 　

  48. Heterogeneous microstructures and corrosion resistance of biomedical Co-Cr-Mo alloy fabricated by electron beam melting (EBM) Peer-reviewed

    Daixiu Wei, Yuichiro Koizumi, Akihiko Chiba, Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima, Yusuke Tsutsumi, Takao Hanawa

    Additive Manufacturing　24　103-114　2018/12

    DOI： 10.1016/j.addma.2018.09.006 　

    eISSN： 2214-8604

  49. Microstructural Changes During Plastic Deformation and Corrosion Properties of Biomedical Co-20Cr-15W-10Ni Alloy Heat-Treated at 873 K Peer-reviewed

    Kosuke Ueki, Kyosuke Ueda, Masaaki Nakai, Takayoshi Nakano, Takayuki Narushima

    Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science　49　(6)　2393-2404　2018/06/01

    Publisher: Springer Boston

    DOI： 10.1007/s11661-018-4597-0 　

    ISSN： 1073-5623

  50. Effect of Si on the oxidation reaction of α-Ti(0 0 0 1) surface: ab initio molecular dynamics study Peer-reviewed

    Somesh Kr. Bhattacharya, Ryoji Sahara, Kyosuke Ueda, Takayuki Narushima

    Science and Technology of Advanced Materials　18　(1)　998-1004　2017/12/31

    Publisher: Taylor and Francis Ltd.

    DOI： 10.1080/14686996.2017.1403273 　

    ISSN： 1878-5514 1468-6996

  51. First principles study of oxidation of Si-segregated alpha-Ti(0001) surfaces Peer-reviewed

    Somesh Kr. Bhattacharya, Ryoji Sahara, Tomonori Kitashima, Kyosuke Ueda, Takayuki Narushima

    JAPANESE JOURNAL OF APPLIED PHYSICS　56　(12)　125701-1-125701-7　2017/12

    DOI： 10.7567/JJAP.56.125701 　

    ISSN： 0021-4922

    eISSN： 1347-4065

  52. In vitro performance of Ag-incorporated hydroxyapatite and its adhesive porous coatings deposited by electrostatic spraying Peer-reviewed

    Ozkan Gokcekaya, Thomas J. Webster, Kyosuke Ueda, Takayuki Narushima, Celaletdin Ergun

    MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS　77　556-564　2017/08

    DOI： 10.1016/j.msec.2017.03.233 　

    ISSN： 0928-4931

    eISSN： 1873-0191

  53. Effect of heat treatment and alloying elements on precipitation and surface behavior of Co-Cr-Mo alloys Peer-reviewed

    Alfirano, A. Milandia, T. Narushima

    ARPN Journal of Engineering and Applied Sciences　12　(12)　3808-3812　2017/06/15

  54. In vitro evaluation of Ag-containing calcium phosphates: Effectiveness of Ag-incorporated beta-tricalcium phosphate Peer-reviewed

    Ozkan Gokcekaya, Kyosuke Ueda, Kouetsu Ogasawara, Hiroyasu Kanetaka, Takayuki Narushima

    MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS　75　926-933　2017/06

    DOI： 10.1016/j.msec.2017.02.059 　

    ISSN： 0928-4931

    eISSN： 1873-0191

  55. TRAV7-2*02 Expressing CD8⁺ T Cells Are Responsible for Palladium Allergy. International-journal Peer-reviewed

    Yuri Takeda, Yoshiko Suto, Koyu Ito, Wataru Hashimoto, Tadashi Nishiya, Kyosuke Ueda, Takayuki Narushima, Tetsu Takahashi, Kouetsu Ogasawara

    International journal of molecular sciences　18　(6)　1162-1-1162-12　2017/05/31

    DOI： 10.3390/ijms18061162 　

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    While metallic biomaterials have led to an improvement in the quality of life, metal allergies, especially to palladium (Pd), has caused a recent increase in allergic patients. Metal allergy is known to be a T cell-mediated delayed-type hypersensitivity (DTH); however, the pathogenic T cell subsets and the specific T cell receptor (TCR) have not been identified. Therefore, we attempted to identify the pathogenic T cells responsible for Pd allergy. We found that activating CD8⁺ T cells significantly increased and that the TRAV (TCRα variable) 7-2*02 chain skewed in Pd allergic mice. Furthermore, adoptive transfer experiments revealed that in vitro-cultured Pd-stimulated antigen presenting cells (APCs) function as memory APCs with recipient mice developing Pd allergy and that the frequency of TRAV7-2*02 increases the same as conventional Pd allergic mice. In contrast, neither proliferation of CD8⁺ T cells nor increasing of TRAV7-2*02 was observed in major histocompatibility complex I (MHC I)-deficient Pd-APCs transferred to mice. Taken together, we revealed that TRAV7-2*02-expressing CD8⁺ T cells are the pathogenic T cells for the development of Pd allergy. We also identified the CDR3 consensus motif of pathogenic TCRs as CAAXSGSWQLIF in TRAV7-2*02/TRAJ (TCRα junction)22*01 positive cells. These results suggest that the specific TCRs represent novel targets for the development of diagnostics and treatments for metal allergy.

  56. Ceramic coating of Ti and its alloys using dry processes for biomedical applications Peer-reviewed

    T. Ueda, N. Kondo, S. Sado, O. Gokcekaya, K. Ueda, K. Ogasawara, T. Narushima

    Interface Oral Health Science 2016, Innovative Research on Biosis-Abiosis Intelligent Interface　23-34　2017/01/08

    DOI： 10.1007/978-981-10-1560-1_2 　

  57. Development and performance of low-cost beta-type Ti-based alloys for biomedical applications using Mn additions Peer-reviewed

    P.F. Santos, M. Niinomi, H. Liu, M. Nakai, K. Cho, T. Narushima, K. Ueda, N. Ohtsu, M. Hirano, Y. Itoh

    Interface Oral Health Science 2016, Innovative Research on Biosis-Abiosis Intelligent Interface　229-245　2017/01/08

    DOI： 10.1007/978-981-10-1560-1_19 　

  58. In vitro properties of Ag-containing calcium phosphates Peer-reviewed

    Ozkan Gokcekaya, Kyosuke Ueda, Takayuki Narushima, Kouetsu Ogasawara, Hiroyasu Kanetaka

    Ceramic Engineering and Science Proceedings　37　(4)　87-93　2017

    Publisher: American Ceramic Society

    DOI： 10.1002/9781119321682.ch10 　

    ISSN： 0196-6219

  59. Effects of Mo Addition on the Mechanical Properties and Microstructures of Ti-Mn Alloys Fabricated by Metal Injection Molding for Biomedical Applications Peer-reviewed

    Pedro Fernandes Santos, Mitsuo Niinomi, Ken Cho, Huihong Liu, Masaaki Nakai, Takayuki Narushima, Kyosuke Ueda, Yoshinori Itoh

    MATERIALS TRANSACTIONS　58　(2)　271-279　2017

    DOI： 10.2320/matertrans.M2016286 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  60. Preparation of orthophosphate glasses in the MgO-CaO-SiO2-Nb2O5-P2O5 system Peer-reviewed

    Sungho Lee, Kyosuke Ueda, Takayuki Narushima, Takayoshi Nakano, Toshihiro Kasuga

    BIO-MEDICAL MATERIALS AND ENGINEERING　28　(1)　23-30　2017

    DOI： 10.3233/BME-171652 　

    ISSN： 0959-2989

    eISSN： 1878-3619

  61. Removal of Oxygen in Ti-Si Melts by Arc-Melting Peer-reviewed

    Masahito Watanabe, Fumiya Sato, Kyosuke Ueda, Daisuke Matsuwaka, Takayuki Narushima

    MATERIALS TRANSACTIONS　58　(4)　613-618　2017

    DOI： 10.2320/matertrans.M2017003 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  62. Microstructure and Mechanical Properties of an alpha plus beta Type Ti-4V-0.6O Alloy Peer-reviewed

    Masahito Omiya, Kyosuke Ueda, Takayuki Narushima

    MATERIALS TRANSACTIONS　58　(9)　1250-1256　2017

    DOI： 10.2320/matertrans.L-M2017825 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  63. TiO2 layers on Ti-Au alloy formed by two-step thermal oxidation and their photocatalytic activity in visible-light Peer-reviewed

    Takatoshi Ueda, Shota Sado, Kyosuke Ueda, Takayuki Narushima

    MATERIALS LETTERS　185　290-294　2016/12

    DOI： 10.1016/j.matlet.2016.08.066 　

    ISSN： 0167-577X

    eISSN： 1873-4979

  64. Improvement of microstructure, mechanical and corrosion properties of biomedical Ti-Mn alloys by Mo addition Peer-reviewed

    Pedro Fernandes Santos, Mitsuo Niinomi, Huihong Liu, Ken Cho, Masaaki Nakai, Adhitya Trenggono, Sebastien Champagne, Hendra Hermawan, Takayuki Narushima

    MATERIALS & DESIGN　110　(2016)　414-424　2016/11

    DOI： 10.1016/j.matdes.2016.07.115 　

    ISSN： 0264-1275

    eISSN： 1873-4197

  65. Formation of porous layer with low Ni content on NiTi substrate by dealloying in metallic melts Peer-reviewed

    Kyosuke Ueda, Ryuma Hashimoto, Masahiro Hirohashi, Takeshi Wada, Hidemi Kato, Takayuki Narushima

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　63　(8)　766-770　2016/07/01

    Publisher: Journal of the Japan Society of Powder and Powder Metallurgy

    DOI： 10.2497/jjspm.63.766 　

    ISSN： 0532-8799

  66. Microstructural evolution and mechanical properties of biomedical Co-Cr-Mo alloy subjected to high-pressure torsion Peer-reviewed

    Murat Isik, Mitsuo Niinomi, Ken Cho, Masaaki Nakai, Huihong Liu, Hakan Yilmazer, Zenji Horita, Shigeo Sato, Takayuki Narushima

    JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS　59　226-235　2016/06

    DOI： 10.1016/j.jmbbm.2015.11.015 　

    ISSN： 1751-6161

    eISSN： 1878-0180

  67. Fabrication of low-cost beta-type Ti-Mn alloys for biomedical applications by metal injection molding process and their mechanical properties Peer-reviewed

    Pedro Fernandes Santos, Mitsuo Niinomi, Huihong Liu, Ken Cho, Masaaki Nakai, Yoshinori Itoh, Takayuki Narushima, Masahiko Ikeda

    JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS　59　497-507　2016/06

    DOI： 10.1016/j.jmbbm.2016.02.035 　

    ISSN： 1751-6161

    eISSN： 1878-0180

  68. The antihistamine olopatadine regulates T cell activation in palladium allergy Peer-reviewed

    Naohiko Iguchi, Yuri Takeda, Naoki Sato, Kenichirou Ukichi, Akira Katakura, Kyosuke Ueda, Takayuki Narushima, Shigehito Higuchi, Kouetsu Ogasawara

    INTERNATIONAL IMMUNOPHARMACOLOGY　35　(35)　70-76　2016/06

    DOI： 10.1016/j.intimp.2016.03.021 　

    ISSN： 1567-5769

    eISSN： 1878-1705

  69. Microstructure and Mechanical Properties of Heat-Treated Co-20Cr-15W-10Ni Alloy for Biomedical Application Peer-reviewed

    Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　47A　(6)　2773-2782　2016/06

    DOI： 10.1007/s11661-016-3488-5 　

    ISSN： 1073-5623

    eISSN： 1543-1940

  70. Formation and evaluation of thermally-oxidized titania layers on commercially pure Ti Peer-reviewed

    T. Narushima, N. Umetsu, T. Ueda, S. Sado, K. Ueda

    Proceedings of Ti-2015: The 13th World Conference on Titanium　1717-1721　2016/05/06

    DOI： 10.1002/9781119296126.ch288 　

  71. Preparation of Antibacterial ZnO-CaO-P2O5-Nb2O5 Invert Glasses Peer-reviewed

    Sungho Lee, Hirotaka Uehara, Anthony L, B. Maçon, Hirotaka Maeda, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    Materials Transactions　30　30-34　2016/04

  72. Improvement in mechanical strength of low-cost beta-type Ti-Mn alloys fabricated by metal injection molding through cold rolling Peer-reviewed

    Ken Cho, Mitsuo Niinomi, Masaaki Nakai, Huihong Liu, Pedro F. Santos, Yoshinori Itoh, Masahiko Ikeda, Mohamed Abdel-Hady Gepreel, Takayuki Narushima

    JOURNAL OF ALLOYS AND COMPOUNDS　664　272-283　2016/04

    DOI： 10.1016/j.jallcom.2015.12.200 　

    ISSN： 0925-8388

    eISSN： 1873-4669

  73. Structures and dissolution behaviors of MgO-CaO-P2O5-Nb2O5 glasses Peer-reviewed

    Sungho Lee, Hirotaka Maeda, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    JOURNAL OF NON-CRYSTALLINE SOLIDS　438　18-25　2016/04

    DOI： 10.1016/j.jnoncrysol.2016.02.006 　

    ISSN： 0022-3093

    eISSN： 1873-4812

  74. Structure and physicochemical properties of CaO-P2O5-Nb2O5-Na2O glasses Peer-reviewed

    Hirotaka Maeda, Sungho Lee, Tomohiro Miyajima, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    JOURNAL OF NON-CRYSTALLINE SOLIDS　432　60-64　2016/01

    DOI： 10.1016/j.jnoncrysol.2015.06.003 　

    ISSN： 0022-3093

    eISSN： 1873-4812

  75. Microstructure and Mechanical Property of alpha plus beta Type Ti-(0 similar to 10) mass%V-(0.5 similar to 1) mass%O Alloys Peer-reviewed

    Kyosuke Ueda, Tatsuya Kobayashi, Takayuki Narushima

    JOURNAL OF THE JAPAN INSTITUTE OF METALS　80　(1)　60-65　2016

    DOI： 10.2320/jinstmet.JB201503 　

    ISSN： 0021-4876

    eISSN： 1880-6880

  76. Grain Refinement Mechanism and Evolution of Dislocation Structure of Co-Cr-Mo Alloy Subjected to High-Pressure Torsion Peer-reviewed

    Murat Isik, Mitsuo Niinomi, Huihong Liu, Ken Cho, Masaaki Nakai, Zenji Horita, Shigeo Sato, Takayuki Narushima, Hakan Yilmazer, Makoto Nagasako

    MATERIALS TRANSACTIONS　57　(7)　1109-1118　2016

    DOI： 10.2320/matertrans.M2016052 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  77. Optimization of Microstructure and Mechanical Properties of Co-Cr-Mo Alloys by High-Pressure Torsion and Subsequent Short Annealing Peer-reviewed

    Murat Isik, Mitsuo Niinomi, Huihong Liu, Ken Cho, Masaaki Nakai, Zenji Horita, Takayuki Narushima, Kyosuke Ueda

    MATERIALS TRANSACTIONS　57　(11)　1887-1896　2016

    DOI： 10.2320/matertrans.M2016112 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  78. Changes in Microstructure of Biomedical Co-Cr-Mo Alloys during Aging at 973 to 1373 K Peer-reviewed

    Kosuke Ueki, Yuto Kurihara, Shingo Mineta, Alfirano, Kyosuke Ueda, Shigenobu Namba, Takashi Yoneda, Takayuki Narushima

    MATERIALS TRANSACTIONS　57　(12)　2048-2053　2016

    DOI： 10.2320/matertrans.MI201507 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  79. Effects of Precipitates and Albumin in Simulated Body Fluids on Pin-on-Disk Wear Behavior of Biomedical Co-Cr-Mo Alloys Peer-reviewed

    Kyosuke Ueda, Motoka Kasamatsu, Masanori Tanno, Kosuke Ueki, Jean Geringer, Takayuki Narushima

    MATERIALS TRANSACTIONS　57　(12)　2054-2059　2016

    DOI： 10.2320/matertrans.MI201518 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  80. Preparation of Antibacterial ZnO-CaO-P2O5-Nb2O5 Invert Glasses Peer-reviewed

    Sungho Lee, Hirotaka Uehara, Anthony L. B. Macon, Hirotaka Maeda, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    MATERIALS TRANSACTIONS　57　(12)　2072-2076　2016

    DOI： 10.2320/matertrans.MI201503 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  81. Effect of light elements on fatigue properties of NiTi wires for designing biomedical stents Peer-reviewed

    K. Hara, K. Ueda, T. Narushima, F. Yamashita, K. Ishikawa

    Proceedings of the 24th International Symposium on Processing and Fabrication of Advanced Materials, PFAM XXIV　20-28　2015/12/18

  82. Microstructure, tensile properties and corrosive properties of ASTM F90 Co-20Cr-15W-10Ni Alloys Peer-reviewed

    K. Ueki, K. Ueda, T. Narushima

    Proceedings of the 24th International Symposium on Processing and Fabrication of Advanced Materials, PFAM XXIV　50-58　2015/12/18

  83. In vitro evaluation of Ag-containing calcium phosphates Peer-reviewed

    O. Gokcekaya, K. Ueda, T. Narushima, K. Ogasawara

    Proceedings of the 24th International Symposium on Processing and Fabrication of Advanced Materials, PFAM XXIV　95-103　2015/12/18

  84. Design, microstructural characterization and mechanical evaluation of novel Ti-Mn-Mo alloys for biomedical applications Peer-reviewed

    P.F. Santos, M. Niinomi, H. Liu, M. Nakai, K. Cho, T. Narushima

    Proceedings of the 24th International Symposium on Processing and Fabrication of Advanced Materials, PFAM XXIV　120-125　2015/12/18

  85. Behavior of oxygen in arc-melted Ti–Si alloys Peer-reviewed

    M. Watanabe, K. Ueda, T. Narushima, D. Matsuwaka

    Proceedings of the 24th International Symposium on Processing and Fabrication of Advanced Materials, PFAM XXIV　513-520　2015/12/18

  86. Microstructure and balanced mechanical properties of short-time solution treated Co-Cr-Mo alloys processed through high-pressure torsion Peer-reviewed

    M. Isik, M. Niinomi, H. Liu, M. Nakai, K. Cho, Z. Horita, T. Narushima

    Proceedings of the 24th International Symposium on Processing and Fabrication of Advanced Materials, PFAM XXIV　680-685　2015/12/18

  87. Formation of TiO2 layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity Peer-reviewed

    Shota Sado, Takatoshi Ueda, Kyosuke Ueda, Takayuki Narushima

    APPLIED SURFACE SCIENCE　357　2198-2205　2015/12

    DOI： 10.1016/j.apsusc.2015.09.211 　

    ISSN： 0169-4332

    eISSN： 1873-5584

  88. Visible light activities of TiO2 layers formed on Ti-Ag and Ti-Au alloys by thermal oxidation Peer-reviewed

    T. Ueda, S. Sado, K. Ueda, T. Narushima

    Proceedings for International Symposium on Eco Topia Science 2015　2015/11

  89. Structures and dissolution behaviors of CaO-P2O5-TiO2/Nb2O5 (Ca/P &gt;= 1) invert glasses Peer-reviewed

    Sungho Lee, Hirotaka Maeda, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    JOURNAL OF NON-CRYSTALLINE SOLIDS　426　35-42　2015/10

    DOI： 10.1016/j.jnoncrysol.2015.06.024 　

    ISSN： 0022-3093

    eISSN： 1873-4812

  90. Microstructures, mechanical properties and cytotoxicity of low cost beta Ti-Mn alloys for biomedical applications Peer-reviewed

    Pedro Fernandes Santos, Mitsuo Niinomi, Ken Cho, Masaaki Nakai, Huihong Liu, Naofumi Ohtsu, Mitsuhiro Hirano, Masahiko Ikeda, Takayuki Narushima

    ACTA BIOMATERIALIA　26　366-376　2015/10

    DOI： 10.1016/j.actbio.2015.08.015 　

    ISSN： 1742-7061

    eISSN： 1878-7568

  91. Structure and dissolution behavior of MgO-P2O5-TiO2/Nb2O5 (Mg/P &gt;= 1) invert glasses Peer-reviewed

    Sungho Lee, Hirotaka Maeda, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　123　(1442)　942-948　2015/10

    DOI： 10.2109/jcersj2.123.942 　

    ISSN： 1882-0743

    eISSN： 1348-6535

  92. Formation of the chi-Phase Precipitate in Co-28Cr-6Mo Alloys with Additional Si and C Peer-reviewed

    Kei Sugawara, Alfirano, Shingo Mineta, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　46A　(9)　4342-4350　2015/09

    DOI： 10.1007/s11661-015-3008-z 　

    ISSN： 1073-5623

    eISSN： 1543-1940

  93. Synthesis and characterization of Ag-containing calcium phosphates with various Ca/P ratios Peer-reviewed

    Ozkan Gokcekaya, Kyosuke Ueda, Takayuki Narushima, Celaletdin Ergun

    MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS　53　111-119　2015/08

    DOI： 10.1016/j.msec.2015.04.025 　

    ISSN： 0928-4931

    eISSN： 1873-0191

  94. Control of bioresorbability of amorphous calcium phosphate coating film with niobium added Peer-reviewed

    K. Ueda, T. Takahashi, A. Obata, T. Kasuga, T. Goto, T. Narushima

    Proceedings of the Biomaterials International Conference 2015　1026　2015/06

  95. Effect of heat treatment of the microstructure and mechanical properties of biomedical Co-20Cr-15W-10Ni alloy Peer-reviewed

    K. Ueki, K. Ueda, T. Narushima

    Proceedings of the Biomaterials International Conference 2015　1182　2015/06

  96. Evaluation of photocatalytic activity of the tio2 layer formed on ti by thermal oxidation Peer-reviewed

    Takayuki Narushima, Shota Sado, Natsumi Kondo, Kyosuke Ueda

    Interface Oral Health Science 2014: Innovative Research on Biosis-Abiosis Intelligent Interface　65-78　2015/01/01

    Publisher: Springer Japan

    DOI： 10.1007/978-4-431-55192-8_6 　

  97. CONTROL OF Ag RELEASE FROM Ag-CONTAINING CALCIUM PHOSPHATES IN SIMULATED BODY FLUID Peer-reviewed

    Ozkan Gokcekaya, Kyosuke Ueda, Takayuki Narushima

    BIOMATERIALS SCIENCE: PROCESSING, PROPERTIES, AND APPLICATIONS V　254　13-20　2015

    DOI： 10.1002/9781119190134.ch2 　

    ISSN： 1042-1122

  98. Evaluation of Thin Amorphous Calcium Phosphate Coatings on Titanium Dental Implants Deposited Using Magnetron Sputtering Peer-reviewed

    Sou Yokota, Naruhiko Nishiwaki, Kyosuke Ueda, Takayuki Narushima, Hiroshi Kawamura, Tetsu Takahashi

    IMPLANT DENTISTRY　23　(3)　343-350　2014/06

    DOI： 10.1097/ID.0000000000000098 　

    ISSN： 1056-6163

  99. NKG2D(+) IFN-gamma(+) CD8(+) T Cells Are Responsible for Palladium Allergy Peer-reviewed

    Mitsuko Kawano, Masafumi Nakayama, Yusuke Aoshima, Kyohei Nakamura, Mizuho Ono, Tadashi Nishiya, Syou Nakamura, Yuri Takeda, Akira Dobashi, Akiko Takahashi, Misato Endo, Akiyo Ito, Kyosuke Ueda, Naoki Sato, Shigehito Higuchi, Takeru Kondo, Suguru Hashimoto, Masamichi Watanabe, Makoto Watanabe, Tetsu Takahashi, Keiichi Sasaki, Masanori Nakamura, Takehiko Sasazuki, Takayuki Narushima, Ryuji Suzuki, Kouetsu Ogasawara

    PLOS ONE　9　(2)　e86810　2014/02

    DOI： 10.1371/journal.pone.0086810 　

    ISSN： 1932-6203

  100. Preparation of calcium pyrophosphate glass-ceramics containing Nb2O5 Peer-reviewed

    Hirotaka Maeda, Tomohiro Miyajima, Sungho Lee, Akiko Obata, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　122　(1421)　122-124　2014/01

    DOI： 10.2109/jcersj2.122.122 　

    ISSN： 1882-0743

    eISSN： 1348-6535

  101. Precipitate phases and mechanical properties of heat-treated ASTM F 90 Co-Cr-W-Ni alloy Peer-reviewed

    Kosuke Ueki, Kyosuke Ueda, Takayuki Narushima

    ADVANCED CERAMICS AND NOVEL PROCESSING　616　258-262　2014

    DOI： 10.4028/www.scientific.net/KEM.616.258 　

    ISSN： 1013-9826

  102. Microstructural analysis of biomedical Co-Cr-Mo alloy subjected to high-pressure torsion processing Peer-reviewed

    Murat Isik, Mitsuo Niinomi, Ken Cho, Masaaki Nakai, Junko Hieda, Hakan Yilmazer, Zenji Horita, Takayuki Narushima

    ADVANCED CERAMICS AND NOVEL PROCESSING　616　263-269　2014

    DOI： 10.4028/www.scientific.net/KEM.616.263 　

    ISSN： 1013-9826

  103. Photocatalytic evaluation of anatase layer formed on Ti alloys by thermal oxidation Peer-reviewed

    S. Sado, K. Ueda, T. Narushima, M. Kawano, K. Ogasawara

    Proceedings for International Symposium on Eco Topia Science 2013　1131　2013/11

  104. Ag distribution in calcium phosphates with various Ca/P ratios Peer-reviewed

    O. Gokcekaya, K. Ueda, T. Narushima, C. Ergun

    Proceedings for International Symposium on Eco Topia Science 2013　1113　2013/11

  105. Formation of Anatase on Commercially Pure Ti by Two-Step Thermal Oxidation Using N-2-CO Gas Peer-reviewed

    Nobuyuki Umetsu, Shota Sado, Kyosuke Ueda, Kazuki Tajima, Takayuki Narushima

    MATERIALS TRANSACTIONS　54　(8)　1302-1307　2013/08

    DOI： 10.2320/matertrans.ME201315 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  106. Preparation of Ag-doped calcium phosphate Peer-reviewed

    O. Gokcekaya, K. Ueda, T. Narushima, C. Ergun

    Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing　1679-1685　2013/08

  107. 金属材料のセラミックスコーティング Peer-reviewed

    成島尚之, 上田恭介

    加工プロセスによる材料機能発現第176委員会 第24回研究会資料　62-81　2013

  108. Phase and Formation/Dissolution of Precipitates in Biomedical Co-Cr-Mo Alloys with Nitrogen Addition Peer-reviewed

    Shingo Mineta, Alfirano, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　44A　(1)　494-503　2013/01

    DOI： 10.1007/s11661-012-1399-7 　

    ISSN： 1073-5623

  109. Effect of Ba deoxidation on oxygen content in NiTi alloys and non-metallic inclusions Peer-reviewed

    Daisuke Ito, Naruhiko Nishiwaki, Kyosuke Ueda, Takayuki Narushima

    JOURNAL OF MATERIALS SCIENCE　48　(1)　359-366　2013/01

    DOI： 10.1007/s10853-012-6753-z 　

    ISSN： 0022-2461

    eISSN： 1573-4803

  110. beta-Grain Refinement of alpha+beta-Type Ti-4.5Al-6Nb-2Fe-2Mo Alloy by Using Rare-Earth-Oxide Precipitates Peer-reviewed

    Kyosuke Ueda, Shinichiro Nakaoka, Takayuki Narushima

    MATERIALS TRANSACTIONS　54　(2)　161-168　2013

    DOI： 10.2320/matertrans.MC201207 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  111. Mass loss and ion elution of biomedical Co-Cr-Mo alloys during pin-on-disk wear tests Peer-reviewed

    Kyosuke Ueda, Kaori Nakaie, Shigenobu Namba, Takashi Yoneda, Keita Ishimizu, Takayuki Narushima

    Materials Transactions　54　(8)　1281-1287　2013

    DOI： 10.2320/matertrans.ME201316 　

    ISSN： 1345-9678

  112. RFマグネトロンスパッタリング法による非晶質リン酸カルシウムコーティングの評価

    横田 聡, 栗原 淳, 西脇 成彦, 玉手 総一郎, 上田 恭介, 成島 尚之, 川村 仁, 高橋 哲

    Japanese Journal of Maxillo Facial Implants　11　(3)　243-243　2012/11

    Publisher: (公社)日本顎顔面インプラント学会

    ISSN： 1347-894X

  113. Effects of Niobium Ions Released from Calcium Phosphate Invert Glasses Containing Nb2O5 on Osteoblast-Like Cell Functions Peer-reviewed

    Akiko Obata, Yoshiaki Takahashi, Tomohiro Miyajima, Kyosuke Ueda, Takayuki Narushima, Toshihiro Kasuga

    ACS APPLIED MATERIALS & INTERFACES　4　(10)　5684-5690　2012/10

    DOI： 10.1021/am301614a 　

    ISSN： 1944-8244

  114. Quantitative analyses of osteogenic-differentiation-related gene expressions in human osteoblast-like cells (Saos-2) cultured on hydroxyapatite and titanium Peer-reviewed

    M. Taira, W. Hatakeyama, H. Kihara, H. Kondo, K. Ueda, T. Narushima

    J. Oral Tissue. Engin.　10　(1)　34-41　2012/10/01

    Publisher: Japanese Association of Regenerative Dentistry

    DOI： 10.11223/jarde.10.34 　

    ISSN： 1348-9623

    More details Close

    The purpose of this study was to examine osteogenic differentiation behaviors at gene expression levels of osteoblast-like cells (SaOS-2) when cultured on polystyrene (PS), hydoroxyapatite (HAP) and titanium (Ti) for 8, 16 and 24 days, using six primer sets such as those for genes (mRNAs) of glyceraldehyde 3-phosphate dehydrogenase (GAPDH), alkaline phosphatase (ALPL), type 1 collagen (COL1A1), osteopontin (SPP1), bone Sialo protein (IBSP) and osteocalcin precursor (BGLAP). With respect to GAPDH control, ALPL and COL1A1; SPP1 and IBSP; and BGLAP were used as initial-stage, middle-to-late-stage, and last-stage osteogenic differentiation phenotype markers, respectively. Quantitative real-time RT-PCR analyses revealed that HAP most differentiated SaOS-2, followed by Ti while PS did least. It was re-confirmed that with respect to PS, HAP was an excellent osteo-conductive material while Ti also exerted moderate osteo-conductive effects on SaOS-2 in the cell culture condition.

  115. Precipitates in Biomedical Co-28Cr-6Mo-(0-0.41)C Alloys Heat-Treated at 1473 K to 1623 K (1200 degrees C to 1350 degrees C) Peer-reviewed

    Shingo Mineta, Alfirano, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　43A　(9)　3351-3358　2012/09

    DOI： 10.1007/s11661-012-1142-4 　

    ISSN： 1073-5623

  116. Biomechanical Evaluation of Amorphous Calcium Phosphate Coated TNTZ Implants Prepared Using a Radiofrequency Magnetron Sputtering System Peer-reviewed

    Naru Shiraishi, Rong Tu, Risa Uzuka, Takahisa Anada, Takayuki Narushima, Takashi Goto, Mitsuo Niinomi, Keiichi Sasaki, Osamu Suzuki

    MATERIALS TRANSACTIONS　53　(7)　1343-1348　2012/07

    DOI： 10.2320/matertrans.M2012078 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  117. Precipitates in Biomedical Co-Cr-Mo-C-N-Si-Mn Alloys Peer-reviewed

    Alfirano, Shingo Mineta, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　43A　(6)　2125-2132　2012/06

    DOI： 10.1007/s11661-011-1009-0 　

    ISSN： 1073-5623

  118. π-phase and χ-phase: new precipitates in biomedical Co-Cr-Mo alloys Invited Peer-reviewed

    T. Narushima, S. Mineta, Alfirano, K. Ueda

    Interface Oral Health Science 2011　72-80　2012/04

    DOI： 10.1007/978-4-431-54070-0_102 　

  119. Calcium phosphate-coated titanium alloy implants prepared by radiofrequency magnetron sputtering: A review Peer-reviewed

    Naru Shiraishi, Yuko Suzuki, Naoko Sato, Takahisa Anada, Takashi Goto, Rong Tu, Mitsuo Niinomi, Takayuki Narushima, Kyosuke Ueda, Risa Uzuka, Osamu Suzuki, Keiichi Sasaki

    Interface Oral Health Science 2011　352-354　2012/01/01

    Publisher: Springer Japan

    DOI： 10.1007/978-4-431-54070-0_102 　

  120. Accelerated bone formation around titanium dental implants with amorphous calcium phosphate coating in rabbits Peer-reviewed

    Sou Yokota, Jun Kurihara, Naruhiko Nishiwaki, Soichiro Tamate, Kyosuke Ueda, Takayuki Narushima, Hiroshi Kawamura

    Interface Oral Health Science 2011　243-245　2012/01/01

    Publisher: Springer Japan

    DOI： 10.1007/978-4-431-54070-0_69 　

  121. Grain Refinement in alpha plus beta-type Ti-4. 5Al-6Nb-2Fe-2Mo Alloys through Precipitation of TiB or Rare Earth Oxides Peer-reviewed

    Yasunori Kimura, Nobuyuki Umetsu, Naomichi Iwata, Shinichiro Nakaoka, Kyosuke Ueda, Takayuki Narushima

    TI-2011: PROCEEDINGS OF THE 12TH WORLD CONFERENCE ON TITANIUM, VOL III　2077-2080　2012

  122. Two-step Gas Treatment of Commercially Pure Titanium for Anatase Layer Formation Peer-reviewed

    Nobuyuki Umetsu, Takuro Okazumi, Kyosuke Ueda, Takayuki Narushima

    TI-2011: PROCEEDINGS OF THE 12TH WORLD CONFERENCE ON TITANIUM, VOL III　2106-2110　2012

  123. Deoxidation of NiTi Alloys Using Metallic Barium and their Microstructures Peer-reviewed

    Takayuki Narushima, Daisuke Ito, Kyosuke Ueda

    TI-2011: PROCEEDINGS OF THE 12TH WORLD CONFERENCE ON TITANIUM, VOL III　2050-2053　2012

  124. Precipitates in As-Cast and Heat-Treated ASTM F75 Co-Cr-Mo-C Alloys Containing Si and/or Mn Peer-reviewed

    Alfirano, Shingo Mineta, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　42A　(7)　1941-1949　2011/07

    DOI： 10.1007/s11661-011-0604-4 　

    ISSN： 1073-5623

  125. Anatase formation on titanium by two-step thermal oxidation Peer-reviewed

    Takuro Okazumi, Kyosuke Ueda, Kazuki Tajima, Nobuyuki Umetsu, Takayuki Narushima

    JOURNAL OF MATERIALS SCIENCE　46　(9)　2998-3005　2011/05

    DOI： 10.1007/s10853-010-5177-x 　

    ISSN： 0022-2461

    eISSN： 1573-4803

  126. Enhancement of nickel elution by lipopolysaccharide-induced inflammation Peer-reviewed

    Rina Tanaka, Yoshiaki Goi, Kenji Ishihara, Kyosuke Ueda, Takayuki Narushima, Hiroshi Ohtsu, Masahiro Hiratsuka, Noriyasu Hirasawa

    JOURNAL OF DERMATOLOGICAL SCIENCE　62　(1)　50-57　2011/04

    DOI： 10.1016/j.jdermsci.2010.12.006 　

    ISSN： 0923-1811

    eISSN： 1873-569X

  127. Assessment of the release of nickel from biomaterials in vivo and in vitro: enhancement by lipopolysaccharide Peer-reviewed

    Rina Tanaka, Yoshiaki Goi, Kenji Ishihara, Kyosuke Ueda, Takayuki Narushima, Hiroshi Ohtsu, K. Ohuchi, Masahiro Hiratsuka, Noriyasu Hirasawa

    Inflam. Regene.　31　(3)　302-306　2011

    Publisher: The Japanese Society of Inflammation and Regeneration

    DOI： 10.2492/inflammregen.31.302 　

    ISSN： 1880-9693

    More details Close

    Biodevices are implanted for long periods of time, so the release of metal ions from alloys should be tested in tissues to assess the risk of inducing metal allergies. However there is little evidence that the release of metal ions from alloys in vivo is similar to that in vitro. We implanted metal wires in mice and determined the concentration of metal ions in tissue to analyze the mechanisms responsible for metal allergies. The release of ions from the Ni wire was detected within 8 h and attained a plateau 72 h after the implantation. Furthermore, it was significantly increased by an injection of LPS. The results indicated that the release of Ni was apparently enhanced by inflammatory responses. We also established an in vitro assay system using the murine macrophage cell line RAW 264. The addition of LPS apparently increased the amount of Ni released into the medium, indicating the activation of the cells to have enhanced the elution of ions from the Ni plate. Our in vitro model using LPS-stimulated RAW264 cells might reflect the elution of Ni in inflamed tissue.

  128. Alkali Hydrothermal Synthesis of Zeolite A Using Oxide By-products Peer-reviewed

    Taichi Murakami, Yoshiyuki Sugano, Tsunetoshi Kinami, Takayuki Narushima, Yasutaka Iguchi, Chiaki Ouchi

    ISIJ INTERNATIONAL　51　(1)　158-165　2011

    DOI： 10.2355/isijinternational.51.158 　

    ISSN： 0915-1559

  129. Recovery of Calcium from BF Slag and Synthesis of Zeolite A Using Its Residue Peer-reviewed

    Taichi Murakami, Yoshiyuki Sugano, Takayuki Narushima, Yasutaka Iguchi, Chiaki Ouchi

    ISIJ INTERNATIONAL　51　(6)　901-905　2011

    DOI： 10.2355/isijinternational.51.901 　

    ISSN： 0915-1559

  130. Precipitates in Biomedical Co-Cr-Mo-C-Si-Mn Alloys Peer-reviewed

    T. Narushima, Alfirano, S. Mineta, S. Namba, T. Yoneda, K. Ueda

    ADVANCED MATERIALS RESEARCH QIR 12　277　51-+　2011

    DOI： 10.4028/www.scientific.net/AMR.277.51 　

    ISSN： 1022-6680

  131. Surface modification of titanium by pack cementation treatment using calcium phosphate powders for biomedical applications Peer-reviewed

    Kyosuke Ueda, Hajime Suto, Takayuki Narushima

    METALS AND MATERIALS INTERNATIONAL　16　(4)　569-572　2010/08

    DOI： 10.1007/s12540-010-0808-y 　

    ISSN： 1598-9623

  132. Carbide Formation and Dissolution in Biomedical Co-Cr-Mo Alloys with Different Carbon Contents during Solution Treatment Peer-reviewed

    Shingo Mineta, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　41A　(8)　2129-2138　2010/08

    DOI： 10.1007/s11661-010-0227-1 　

    ISSN： 1073-5623

  133. Fabrication and evaluation of multi-layered calcium phosphate coating film on titanium Peer-reviewed

    Kyosuke Ueda, Yuuki Kawasaki, Takashi Goto, Jun Kurihara, Hiroshi Kawamura, Takayuki Narushima

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　57　(5)　314-320　2010/05

    DOI： 10.2497/jjspm.57.314 　

    ISSN： 0532-8799

  134. S0201-1-2 Formation of anatase film on titanium and its evaluation of bone compatibility

    NARUSHIMA Takayuki, UEDA Kyosuke, OKAZUMI Takuro

    The proceedings of the JSME annual meeting　2010　13-14　2010

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2010.5.0_13 　

    More details Close

    The oxide phase on Ti, TiO_2, is known to affect their properties. Anatase has been suggested to have excellent bone forming ability as compared to rutile. The anatase layer formation on Ti and its alloys by thermal oxidation could be the low-cost and simple surface treatment for improving their bone compatibility. We developed the two-step thermal oxidation process for the anatase layer formation on CP Ti. At the first-step, CP Ti is heat-treated in an Ar-CO atmosphere. At the second-step, the specimens were oxidized in air, and anatase-rich layer was obtained in the case of that oxycarbide (TiC_xO_y) single phase was formed at the first-step. The immersion tests in simulated body fluid showed that the anatase-rich layer improved the bone compatibility of CP Ti. The bonding strength between the anatase-rich layer and CP Ti was higher than 90 MPa.

  135. New-generation metallic biomaterials Peer-reviewed

    T. Narushima

    Metals for Biomedical Devices　355-378　2010

    Publisher: Elsevier Ltd

    DOI： 10.1533/9781845699246.4.355 　

  136. Preparation of functionally graded bio-ceramic film by MOCVD Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    MULTISCALE, MULTIFUNCTIONAL AND FUNCTIONALLY GRADED MATERIALS　631-632　193-+　2010

    DOI： 10.4028/www.scientific.net/MSF.631-632.193 　

    ISSN： 0255-5476

  137. Calcium Phosphate Coating on Blast-treated Titanium Implants by RF Magnetron Sputtering Peer-reviewed

    K. Ueda, T. Narushima, T. Goto, T. Katsube, H. Nakagawa, H. Kawamura, M. Taira

    MULTISCALE, MULTIFUNCTIONAL AND FUNCTIONALLY GRADED MATERIALS　631-632　211-+　2010

    DOI： 10.4028/www.scientific.net/MSF.631-632.211 　

    ISSN： 0255-5476

  138. Changes in microstructure of biomedical Co-Cr-Mo-C alloys with solution treating and aging Peer-reviewed

    S. Mineta, S. Namba, T. Yoneda, K. Ueda, T. Narushima

    THERMEC 2009 SUPPLEMENT　89-91　377-+　2010

    DOI： 10.4028/www.scientific.net/AMR.89-91.377 　

    ISSN： 1022-6680

  139. Microscopic observations and inflammatory cytokine productions of human macrophage phagocytising submicron titanium particles Peer-reviewed

    Masayuki Taira, Tadayoshi Kagiya, Hidemitsu Harada, Minoru Sasaki, Shigenobu Kimura, Takayuki Narushima, Takashi Nezu, Yoshima Araki

    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE　21　(1)　267-275　2010/01

    DOI： 10.1007/s10856-009-3834-x 　

    ISSN： 0957-4530

  140. Phase and Morphology of Carbides in ASTM F75 Co-Cr-Mo-C Alloys Formed at 1473 to 1623 K Peer-reviewed

    Shingo Mineta, Alfi Rano, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    PRICM 7, PTS 1-3　654-656　2176-+　2010

    DOI： 10.4028/www.scientific.net/MSF.654-656.2176 　

    ISSN： 0255-5476

  141. Heat Treatment of ASTM F75 Co-Cr-Mo-C-Si-Mn Alloys Peer-reviewed

    Alfirano, Shingo Mineta, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

    PRICM 7, PTS 1-3　654-656　2180-+　2010

    DOI： 10.4028/www.scientific.net/MSF.654-656.2180 　

    ISSN： 0255-5476

  142. Pack Cementation Treatment of Titanium Using Tetracalcium Phosphate Powder for Biomedical Applications Peer-reviewed

    Kyosuke Ueda, Hajime Suto, Kaori Nakaie, Takayuki Narushima

    PRICM 7, PTS 1-3　654-656　2172-2175　2010

    DOI： 10.4028/www.scientific.net/MSF.654-656.2172 　

    ISSN： 0255-5476

  143. Calcium Phosphate Coating on Titanium Using Dry Process Peer-reviewed

    Takayuki Narushima, Kyosuke Ueda, Takashi Goto, Jun Kurihara, Hiroshi Kawamura

    PRICM 7, PTS 1-3　654-656　2162-+　2010

    DOI： 10.4028/www.scientific.net/MSF.654-656.2162 　

    ISSN： 0255-5476

  144. Effect of yttrium addition on grain growth of alpha, beta and alpha plus beta titanium alloys Peer-reviewed

    B. Poorganji, A. Kazahari, T. Narushima, C. Ouchi, T. Furuhara

    15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15)　240　012170　2010

    DOI： 10.1088/1742-6596/240/1/012170 　

    ISSN： 1742-6588

  145. Oxygen Distribution in Titanium Single Crystal Fabricated by Optical Floating-Zone Method under Extremely Low Oxygen Partial Pressure Peer-reviewed

    Koji Hagihara, Takahiro Tachibana, Keita Sasaki, Yoshiyuki Yoshida, Naoki Shirakawa, Tohru Nagasawa, Takayuki Narushima, Takayoshi Nakano

    MATERIALS TRANSACTIONS　50　(12)　2709-2715　2009/12

    DOI： 10.2320/matertrans.MA200903 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  146. Surface Hardening Treatment for Titanium Materials Using Ar-5%CO Gas in Combination with Post Heat Treatment under Vacuum Peer-reviewed

    Y. Z. Kim, Takashi Konno, Taichi Murakami, Takayuki Narushima, Chiaki Ouchi

    MATERIALS TRANSACTIONS　50　(12)　2763-2771　2009/12

    DOI： 10.2320/matertrans.MA200911 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  147. Behavior of Precipitates in Biomedical Co-Cr-Mo-C Alloys during Heat Treatment Peer-reviewed

    S. Mineta, Alfirano, S. Namba, T. Yoneda, K. Ueda, T. Narushima

    Proceedings of Processing and Fabrication of Advance Materials　2009/12

  148. Effect of Addition of Alloying Elements on Microstructure of Biomedical Co-Cr-Mo Alloy Peer-reviewed

    Alfirano, S. Mineta, S. Namba, T. Yoneda, K. Ueda, T. Narushima

    Proceedings of Processing and Fabrication of Advance Materials　2009/12

  149. Surface modification of titanium by dry process for biomedical applications Peer-reviewed

    T. Narushima, K. Ueda, T. Goto

    Proceedings of the 9th International Symposium on Biomaterials　22-27　2009/10/29

  150. Precipitation Behavior in a Hanks' Solution on Ca-P-O Films Prepared by Laser CVD Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    MATERIALS TRANSACTIONS　50　(10)　2455-2459　2009/10

    DOI： 10.2320/matertrans.M2009160 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  151. Fatigue Behaviors of Ultra Fine Wires of beta-Type and alpha-Type Titanium Alloys Peer-reviewed

    Satoshi Yonezawa, Takayuki Narushima, Kyosuke Ueda, Hisamichi Kimura, Chiaki Ouchi, Yasutaka Iguchi

    MATERIALS TRANSACTIONS　50　(7)　1713-1719　2009/07

    DOI： 10.2320/matertrans.MF200920 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  152. Apatite formation behavior on bio-ceramic films prepared by MOCVD Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　117　(1364)　461-465　2009/04

    DOI： 10.2109/jcersj2.117.461 　

    ISSN： 1882-0743

    eISSN： 1348-6535

  153. Gene expression analyses of human macrophage phagocytizing sub-mu titanium particles by allergy DNA chip (Genopal (TM)) Peer-reviewed

    Masayuki Taira, Takashi Nezu, Minoru Sasaki, Shigenobu Kimura, Tadayoshi Kagiya, Hidemitsu Harada, Takayuki Narushima, Yoshima Araki

    BIO-MEDICAL MATERIALS AND ENGINEERING　19　(1)　63-70　2009

    DOI： 10.3233/BME-2009-0564 　

    ISSN： 0959-2989

  154. Calcium phosphate films with/without heat treatments fabricated using RF magnetron sputtering Peer-reviewed

    Kyosuke Ueda, Yuuki Kawasaki, Takayuki Narushima, Takashi Goto, Jun Kurihara, Hironobu Nakagawa, Hiroshi Kawamura, Masayuki Taira

    Journal of Biomechanical Science and Engineering　4　(3)　392-403　2009

    DOI： 10.1299/jbse.4.392 　

    ISSN： 1880-9863

  155. チタンのユビキタス化戦略 Peer-reviewed

    新家光雄, 塙 隆夫, 池田勝彦, 千葉昌彦, 古原 忠, 成島尚之, 土谷浩一, 江村 聡, 中野貴由, 竹中俊英

    2008/12

  156. Fabrication of Titanium Single Crystal by a Floating Zone Method under Extremely Low Oxygen Partial Pressure Peer-reviewed

    Koji Hagihara, Takahiro Tachibana, Keita Sasaki, Yoshiyuki Yoshida, Naoki Shirakawa, Tohru Nagasawa, Takayuki Narushima, Takayoshi Nakano

    JOURNAL OF THE JAPAN INSTITUTE OF METALS　72　(12)　928-934　2008/12

    DOI： 10.2320/jinstmet.72.928 　

    ISSN： 0021-4876

    eISSN： 1880-6880

  157. Surface Hardening Method for Titanium Materials Using Ar-5%CO Gas in Combination with Post Heat Treatment under Vacuum Peer-reviewed

    Y. Z. Kim, Takashi Konno, Taichi Murakami, Takayuki Narushima, Chiaki Ouchi

    JOURNAL OF THE JAPAN INSTITUTE OF METALS　72　(12)　1002-1009　2008/12

    DOI： 10.2320/jinstmet.72.1002 　

    ISSN： 0021-4876

    eISSN： 1880-6880

  158. Hydroxyapatite formation on Ca-P-O coating prepared by MOCVD Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    MATERIALS TRANSACTIONS　49　(8)　1848-1852　2008/08

    DOI： 10.2320/matertrans.MRA2008097 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  159. In Vivo Evaluation of Bioresorbable Calcium Phosphate Films Coated on Titanium Implant by RF Magnetron Sputtering Peer-reviewed

    H.Nakagawa, T.Katsube, K.Ueda, J.Kurihara, T.Goto, T.Narushim, H.Kawamura

    Japanese Journal of Maxillo Facial Implants　7　(1)　3-13　2008/06/25

  160. Fabrication and evaluation of calcium phosphate coating films on blast-treated Ti-6Al-4V alloy substrate Peer-reviewed

    Takayuki Narushima, Kyosuke Ueda, Takashi Goto, Tomoyuki Katsube, Hiroshi Kawamura, Hironobu Nakagawa, Masayuki Taira

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　55　(5)　318-324　2008/05

    DOI： 10.2497/jjspm.55.318 　

    ISSN： 0532-8799

  161. Preparation of Ca-Ti-O/Ca-P-O functionally graded bio-ceramic film by MOCVD Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy　55　(5)　325-330　2008/05

    DOI： 10.2497/jjspm.55.325 　

    ISSN： 0532-8799

  162. The effect of solute elements on hardness and grain size in platinum based binary alloys Peer-reviewed

    Taichi Murakami, Ryoji Sahara, Daisuke Harako, Masahiro Akiba, Takayuki Narushirna, Chiaki Ouchi

    MATERIALS TRANSACTIONS　49　(3)　538-547　2008/03

    DOI： 10.2320/matertrans.MRA2007265 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  163. Deoxidation of NiTi alloy melts using metallic barium Peer-reviewed

    Susumu Miyamoto, Masatoshi Watanabe, Takayuki Narushima, Yasutaka Iguchi

    MATERIALS TRANSACTIONS　49　(2)　289-293　2008/02

    DOI： 10.2320/matertrans.MRA2007219 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  164. Evaluation of sliding wear resistant property of CP titanium and SP-700 titanium alloy surface-hardened by Ar-5%CO gas Peer-reviewed

    Y. Z. Kim, Taichi Murakami, Takayuki Narushima, Chialki Ouch

    ISIJ INTERNATIONAL　48　(1)　89-98　2008

    DOI： 10.2355/isijinternational.48.89 　

    ISSN： 0915-1559

  165. New Manufacturing Method of Iron Foam using Precursor Made of Iron, Graphite and Hematite Powders Peer-reviewed

    T. Murakami, K. Ohara, T. Narushima, C. Ouchi

    POROUS METALS AND METALLIC FOAMS: METFOAM 2007　145-+　2008

  166. Austenitic Grain Growth behavior Immediately after Dynamic Recrystallization in HSLA Steels and Austenitic Stainless Steel Peer-reviewed

    Noriki Fujita, Ryoji Sahara, Takayuki Narushima, Chiaki Ouchi

    ISIJ INTERNATIONAL　48　(10)　1419-1428　2008

    DOI： 10.2355/isijinternational.48.1419 　

    ISSN： 0915-1559

  167. Fatigue Properties of Titanium Wires for Medical Applications Peer-reviewed

    T.Narushima K.Ueda, T.Kinami, H.Kimura, C.Ouchi Y.Iguchi

    Ti-2007, Science and Technology, Proc. the 11th World Conference on Titanium (JIMIC-5)　1505-1508　2007/12/20

  168. In vivo and in vitro Evaluations of Calcium Phosphate Films Coated on Titanium by RF Magnetron Sputtering Peer-reviewed

    K.Ueda T.Narushima T.Goto, H.Nakagawa, H.Kawamura, T.Katsube

    Ti-2007, Science and Technology, Proc. the 11th World Conference on Titanium (JIMIC-5)　1477-1480　2007/12/20

  169. Effect of Alloying Elements on Hot Deformation of Duplex Titanium Alloys Peer-reviewed

    Behrang Poorganji Taichi, Murakami Takayuki, Narushima Chiaki Ouchi, Tadashi Furuhara

    Ti-2007, Science and Technology, Proc. the 11th World Conference on Titanium (JIMIC-5)　535-538　2007/12/20

  170. Evaluation of amorphous calcium phosphate coating films fabricated on titanium by RF magnetron sputtering Peer-reviewed

    K. Ueda, T. Narushima, T. Goto, H. Nakagawa, H. Kawamura, T. Katsube

    1st Asian Biomaterials Congress, Abstract　47　2007/12

  171. Development of a new method for manufacturing iron foam using gases generated by reduction of iron oxide Peer-reviewed

    Taichi Murakami, Kensuke Ohara, Takayuki Narushima, Chiaki Ouchi

    MATERIALS TRANSACTIONS　48　(11)　2937-2944　2007/11

    DOI： 10.2320/matertrans.MRA2007127 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  172. Dynamic and static restoration behaviors of pure lead and tin in the ambient temperature range Peer-reviewed

    Satoshi Hotta, Keigo Matsumoto, Taichi Murakami, Takayuki Narushima, Chiaki Ouchi

    MATERIALS TRANSACTIONS　48　(10)　2665-2673　2007/10

    DOI： 10.2320/matertrans.MRA2007078 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  173. Fabrication of calcium phosphate films for coating on titanium substrates heated up to 773 K by RF magnetron sputtering and their evaluations Peer-reviewed

    Kyosuke Ueda, Takayuki Narushima, Takashi Goto, Masayuki Taira, Tomoyuki Katsube

    Biomedical Materials　2　(3)　S160-S166　2007/09/01

    DOI： 10.1088/1748-6041/2/3/S14 　

    ISSN： 1748-6041 1748-605X

  174. Hydroxyapatite formation on CaTiO3 film prepared by metal-organic chemical vapor deposition Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    MATERIALS TRANSACTIONS　48　(6)　1505-1510　2007/06

    DOI： 10.2320/matertrans.MRA2007016 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  175. The Effect of Small Amounts of Yttrium Addition on Grain Grwoth Under Superplastic Deformation Condition in Newly Developed α+β Type, Ti-4.5Al-6Nb-2Mo-2Fe Alloy Peer-reviewed

    B. Poorganji, S. Hotta, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    Advanced Materials Research　15-17　726-731　2007/04

  176. Evaluation of calcium phosphate coating films on titanium fabricated using RF magnetron sputtering Peer-reviewed

    Kyosuke Ueda, Takayuki Narushima, Takashi Goto, Tomoyuki Katsube, Hironobu Nakagawa, Hiroshi Kawamura, Masayuki Taira

    MATERIALS TRANSACTIONS　48　(3)　307-312　2007/03

    DOI： 10.2320/matertrans.48.307 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  177. Calcium phosphate films coated on titanium by RF magnetron sputtering for medical applications Peer-reviewed

    T. Narushima, K. Ueda, T. Goto, T. Katsube, H. Kawamura, C. Ouchi, Y. Iguchi

    THERMEC 2006, PTS 1-5　539-543　551-+　2007

    DOI： 10.4028/www.scientific.net/MSF.539-543.551 　

    ISSN： 0255-5476

  178. EFFECTS OF COOLING RATE AND DIRECT HOT DEFORMATION CONDITIONS AFTER SOLIDIFICATION ON THE AUSTENITIC MICROSTRUCTURE EVOLVED BY SIMULATED STRIP CASTING AND THIN SLAB CASTING PROCESSES IN HSLA STEELS Peer-reviewed

    S. Hotta, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    THERMEC 2006 SUPPLEMENT　15-17　726-731　2007

    DOI： 10.4028/www.scientific.net/AMR.15-17.726 　

    ISSN： 1022-6680

  179. THE EFFECT OF SMALL AMOUNTS OF YTTRIUM ADDITION ON STATIC AND UNDER SUPERPLASTIC DEFORMATION GRAIN GROWTH IN NEWLY DEVELOPED alpha plus beta TYPE, Ti-4.5Al-6Nb-2Mo-2Fe ALLOY Peer-reviewed

    B. Poorganji, S. Hotta, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    THERMEC 2006 SUPPLEMENT　15-17　970-975　2007

    DOI： 10.4028/www.scientific.net/AMR.15-17.970 　

    ISSN： 1022-6680

  180. Alloy design and properties of new alpha+beta titanium alloy with excellent cold workability, superplasticity and cytocompatibility Peer-reviewed

    Takahiro Hirano, Taichi Murakami, Masayuki Taira, Takayuki Narushima, Chiaki Ouchi

    ISIJ INTERNATIONAL　47　(5)　745-752　2007

    DOI： 10.2355/isijinternational.47.745 　

    ISSN： 0915-1559

  181. Variations in the microstructure and hardness with solution treating and aging conditions in new alpha+beta Titaniurn alloy Ti-4.5%Al-6%Nb-2%Fe-2%Mo Peer-reviewed

    Takahiro Hirano, Taichi Murakami, Takayuki Narushima, Chiaki Ouchi

    ISIJ INTERNATIONAL　47　(7)　1042-1049　2007

    DOI： 10.2355/isijinternational.47.1042 　

    ISSN： 0915-1559

  182. In vitro evaluations of RF magnetron-sputtered calcium phosphate films on titanium Peer-reviewed

    Kyosuke Ueda, Takayuki Narushima, Tomoyuki Katsube, Hiroshi Kawamura, Takashi Goto

    INNOVATION IN CERAMICS SCIENCE AND ENGINEERING　352　305-+　2007

    DOI： 10.4028/0-87849-454-5.305 　

    ISSN： 1013-9826

  183. Hydroxyapatite formation on MOCVD-CaTiO3 coated Ti Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    INNOVATION IN CERAMICS SCIENCE AND ENGINEERING　352　301-+　2007

    DOI： 10.4028/0-87849-454-5.301 　

    ISSN： 1013-9826

  184. Hydroxyapatite formation on calcium phosphate coated titanium Peer-reviewed

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3　561-565　1513-+　2007

    DOI： 10.4028/www.scientific.net/MSF.561-565.1513 　

    ISSN： 0255-5476

  185. 口腔内自動骨延長器の開発：ビーグル犬下顎骨への適用 Peer-reviewed

    勝部朝之, 成島尚之, 中野貴由, 馬越佑吉, 佐々木具文, 伊藤秀美, 古屋泰文, 川村仁

    第6回バイオメカニクス論文集　2006/12

  186. Accumulation of element Ti in macrophage-like RAW264 cells cultured in medium with 1 ppm Ti and effects on cell viability, SOD production and TNF-alpha secretion Peer-reviewed

    Masayuki Taira, Kaori Sasaki, Setsuo Saitoh, Takashi Nezu, Minoru Sasaki, Shigenobu Kimura, Kazunori Terasaki, Kouichiro Sera, Takayuki Narushima, Yoshima Araki

    DENTAL MATERIALS JOURNAL　25　(4)　726-732　2006/12

    DOI： 10.4012/dmj.25.726 　

    ISSN： 0287-4547

  187. In Vivo Evaluation of Calcium Phosophate Films on Titanium Implant by RF Magnetron Sputtering Peer-reviewed

    T.Katsube, H.Nakagawa, T.Narushima, H.Kawamura

    Proceedings of XVIII International Congress of the European Association for Cranio-Maxillofacial Surgery　67-72　2006/12

  188. Oxidation or nitridation behavior of pure chromium and chromium alloys containing 10 mass% ni or Fe in atmospheric heating Peer-reviewed

    Kaori Taneichi, Takayuki Narushima, Yasutaka Iguchi, Chiaki Ouchi

    MATERIALS TRANSACTIONS　47　(10)　2540-2546　2006/10

    DOI： 10.2320/matertrans.47.2540 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  189. Preparation of Graded Biocompatible Films by MOCVD Peer-reviewed

    M.Sato, R.Tu, T.Goto, K.Ueda, T.Narushima

    Proc.FGM　20　109-114　2006/10

  190. Surface hardening treatment in use of CO gas and post-heat treatment in C.P. titanium and titanium alloys Peer-reviewed

    Y. Z. Kim, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    Solid State Phenomena　118　109-114　2006

    Publisher: Trans Tech Publications Ltd

    DOI： 10.4028/www.scientific.net/SSP.118.109 　

    ISSN： 1662-9779

  191. beta grain refinement due to small amounts of yttrium addition in alpha plus beta type titanium alloy, SP-700 Peer-reviewed

    S Hotta, K Yamada, T Murakami, T Narushima, Y Iguchi, C Ouchi

    ISIJ INTERNATIONAL　46　(1)　129-137　2006

    DOI： 10.2355/isijinternational.46.129 　

    ISSN： 0915-1559

  192. Surface hardening treatment for titanium and titanium alloys in use of CO2 gas Peer-reviewed

    Y-Z. Kim, Ryoji Sahara, Takayuki Narushima, Yasutaka Iguchi, Chiaki Ouchi

    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN　92　(1)　1-9　2006/01

    DOI： 10.2355/tetsutohagane1955.92.1_1 　

    ISSN： 0021-1575

  193. Alloy design and property evaluation of new beta type titanium alloy with excellent cold workability and biocompatibility Peer-reviewed

    K Taneichi, M Taira, E Sukedai, T Narushima, Y Iguchi, C Ouchi

    ISIJ INTERNATIONAL　46　(2)　292-301　2006

    DOI： 10.2355/isijinternational.46.292 　

    ISSN： 0915-1559

  194. Surface hardening treatment in use of CO gas and post-heat treatment in CP titanium and titanium alloys Peer-reviewed

    Y. Z. Kim, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    HEAT TREATMENT OF MATERIALS　118　109-+　2006

    DOI： 10.4028/3-908451-25-6.109 　

    ISSN： 1012-0394

  195. Characterization of calcium phosphate films prepared by RF magnetron sputtering Peer-reviewed

    Takayuki Narushima, Kyosuke Ueda, Takashi Goto, Tomoyuki Katsube, Hiroshi Kawamura, Chiaki Ouchi, Yasutaka Iguchi

    MATERIAL AND DEVICES FOR SMART SYSTEMS II　888　101-+　2006

    ISSN： 0272-9172

  196. Surface hardening treatment for CP titanium and titanium alloys in use of Ar-5%CO gas Peer-reviewed

    Y. Z. Kim, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    ISIJ INTERNATIONAL　46　(9)　1329-1338　2006

    DOI： 10.2355/isijinternational.46.1329 　

    ISSN： 0915-1559

  197. Surface Hardening treatment in use of CO gas and Post-heat treatment in C.P. Titanium and Titanium Alloys Peer-reviewed

    Y. Z. Kim, T. Murakami, T. Narushima, Y. Iguchi, C. Ouchi

    Proceedings of The 3rd Asian Conference on Heat Treatment of Materials　252-254　2005/11

  198. Preferred Orientation of Calcium Phosphate Films Prepared by RF Magnetron Sputtering Peer-reviewed

    K. Ueda, T. Narushima, T. Goto, T. Katsube, H. Kawamura, C. Ouchi, Y. Iguchi

    Archives of BioCeramics Research　5　59-62　2005/11

  199. Preparation of calcium phosphate films by radiofrequency magnetron sputtering Peer-reviewed

    T Narushima, K Ueda, T Goto, H Masumoto, T Katsube, H Kawamura, C Ouchi, Y Iguchi

    MATERIALS TRANSACTIONS　46　(10)　2246-2252　2005/10

    DOI： 10.2320/matertrans.46.2246 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  200. Development of dental and medical systems for reconstruction of human body with high performance titanium materials Peer-reviewed

    Tomoyuki Katsube, Kyosuke Ueda, Takayuki Narushima, Takashi Goto, Yasutaka Iguchi, Hiroshi Kawamura

    International Congress Series　1284　324-325　2005/09

    DOI： 10.1016/j.ics.2005.06.067 　

    ISSN： 0531-5131

  201. Fatigue properties of stainless steel wire ropes for electrodes in functional electrical stimulation systems Peer-reviewed

    T Narushima, K Suzuki, T Murakami, C Ouchi, Y Iguchi

    MATERIALS TRANSACTIONS　46　(9)　2083-2088　2005/09

    DOI： 10.2320/matertrans.46.2083 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  202. Materials Transactions: Preface

    Mitsuo Niinomi, Takao Hanawa, Yoshimitsu Okazaki, Masahiko Ikeda, Akihiko Chiba, Takayuki Narushima, Hisao Fukui

    Materials Transactions　46　(7)　1514　2005/07

    ISSN： 1345-9678

  203. Effects of dynamic recrystallization on gamma grain refinement and improvement of micro segregation of As cast Austenite in 9% Ni steel Peer-reviewed

    S Hotta, T Murakami, T Narushima, Y Iguchi, C Ouchi

    ISIJ INTERNATIONAL　45　(3)　338-346　2005

    DOI： 10.2355/isijinternational.45.338 　

    ISSN： 0915-1559

  204. Hydrothermal synthesis of zeolite a using blast furnace slag Peer-reviewed

    Y Sugano, R Sahara, T Murakami, T Narushima, Y Iguchi, C Ouchi

    ISIJ INTERNATIONAL　45　(6)　937-945　2005

    DOI： 10.2355/isijinternational.45.937 　

    ISSN： 0915-1559

  205. Wear loss and elution of CPTi and titanium alloys in simulated body fluids Peer-reviewed

    K Ueda, T Narushima, C Ouchi, Y Iguchi

    PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5　475-479　2333-2336　2005

    DOI： 10.4028/www.scientific.net/MSF.475-479.2333 　

    ISSN： 0255-5476

  206. Evaluation of Fatigue Property of Titanium Wires by Rotating-bending Testing in 1mass% Lactic Acid Solution Peer-reviewed

    T. Narushima, K. Ueda, M. Yamashita, T. Murakami, C. Ouchi, Y. Iguchi

    Proc. of International Functional Electrical Stimulation Society 2004　416-418　2004/07

  207. Boron and nitrogen in GaAs and InP melts equilibrated with B2O3 flux Peer-reviewed

    T Yamada, T Kudo, K Tajima, A Otsuka, T Narushima, C Ouchi, Y Iguchi

    MATERIALS TRANSACTIONS　45　(4)　1306-1310　2004/04

    DOI： 10.2320/matertrans.45.1306 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  208. Nitridation of Titanium-Tin Alloys during Heating in Air Peer-reviewed

    T. Narushima, K. Suzuki, S. Kimura, Y. Iguchi, C. Ouchi

    Ti-2003, Science and Technology, Vol.IV　2115-2122　2004/04

  209. Refinement of beta Grain Size Due to TiB or Y2O3 Precipitates in Titanium Alloy Peer-reviewed

    T. Nomura, N. Yamamoto, T. Narushima, Y. Iguchi, C. Ouchi

    Ti-2003, Science and Technology, Vol.II　1235-1242　2004/04

    Publisher:

  210. Oxidation of boron carbide-silicon carbide composite at 1073 to 1773 K Peer-reviewed

    T Narushima, T Goto, M Maruyama, H Arashi, Y Iguchi

    MATERIALS TRANSACTIONS　44　(3)　401-406　2003/03

    DOI： 10.2320/matertrans.44.401 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  211. Wet Oxidation of Silicon Carbide and Silicon Nitride Peer-reviewed

    T. Narushima, T. Goto, C. Ouchi, Y. Iguchi

    Metals Materials and Processes　15　(1-2)　177-185　2003/01

  212. Application of Srβ-alumina solid electrolyte to a CO2 gas sensor Peer-reviewed

    Takashi Goto, Gang He, Takayuki Narushima, Yasutaka Iguchi

    Solid State Ionics　156　(3-4)　329-336　2003/01

    DOI： 10.1016/S0167-2738(02)00681-1 　

    ISSN： 0167-2738

  213. Grain refinement of As cast austenite by dynamic recrystallization in HSLA steels Peer-reviewed

    N Fujita, T Narushima, Y Iguchi, C Ouchi

    ISIJ INTERNATIONAL　43　(7)　1063-1072　2003

    DOI： 10.2355/isijinternational.43.1063 　

    ISSN： 0915-1559

  214. Austenitic grain refinement in as cast HSLA steels by dynamic recrystallization Peer-reviewed

    N Fujita, T Narushima, Y Iguchi, C Ouchi

    THERMEC'2003, PTS 1-5　426-4　1095-1100　2003

    DOI： 10.4028/www.scientific.net/MSF.426-432.1095 　

    ISSN： 0255-5476

  215. Model studies of surfaces and interfaces in ceramics Peer-reviewed

    M Kitayama, T Narushima, K Tran, G Gronsky, AM Glaese

    ADVANCED CERAMICS AND COMPOSITES　247　341-347　2003

    DOI： 10.4028/www.scientific.net/KEM.247.341 　

    ISSN： 1013-9826

  216. Fatigue Property of Stainless Steel FES Electrode in Hanks' Solution Peer-reviewed

    Y. Iguchi Yasutaka, T. Narushima, K. Suzuki, S. Yoshida, M. Watanabe, T. Kinami, C. Ouchi

    Proc. of International Functional Electrical Stimulation Society 2002　217-219　2002/09

  217. Oxidation of silicon and silicon carbide in ozone-containing atmospheres at 973 K Peer-reviewed

    T Narushima, M Kato, S Murase, C Ouchi, Y Iguchi

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　85　(8)　2049-2055　2002/08

    DOI： 10.1111/j.1151-2916.2002.tb00402.x 　

    ISSN： 0002-7820

  218. Solubilities and equilibrium distribution coefficients of oxygen and carbon in silicon Peer-reviewed

    T Narushima, A Yamashita, C Ouchi, Y Iguchi

    MATERIALS TRANSACTIONS　43　(8)　2120-2124　2002/08

    DOI： 10.2320/matertrans.43.2120 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  219. Behavior of oxygen in Ga-As melts with the range of As content up to 5 mass% equilibrated with B2O3 flux Peer-reviewed

    K Tajima, T Ogasawara, T Narushima, C Ouchi, Y Iguchi

    MATERIALS TRANSACTIONS　42　(11)　2434-2439　2001/11

    DOI： 10.2320/matertrans.42.2434 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  220. Calorimetric study on hydration of CaO-based oxides Peer-reviewed

    Y. Iguchi, T. Narushima, C. Izumi

    Journal of Alloys and Compounds　321　(2)　276-281　2001/06/14

    DOI： 10.1016/S0925-8388(01)00970-7 　

    ISSN： 0925-8388

  221. High-temperature morphological evolution of lithographically introduced cavities in silicon carbide Peer-reviewed

    T Narushima, AM Glaeser

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　84　(5)　921-928　2001/05

    DOI： 10.1111/j.1151-2916.2001.tb00769.x 　

    ISSN： 0002-7820

  222. The Wulff shape of alumina: I. Modeling the kinetics of morphological evolution Peer-reviewed

    M Kitayama, T Narushima, WC Carter, RM Cannon, AM Glaeser

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　83　(10)　2561-2571　2000/10

    DOI： 10.1111/j.1151-2916.2000.tb01591.x 　

    ISSN： 0002-7820

  223. The Wulff shape of alumina: II. Experimental measurements of pore shape evolution rates Peer-reviewed

    M Kitayama, T Narushima, AM Glaeser

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　83　(10)　2572-2583　2000/10

    DOI： 10.1111/j.1151-2916.2000.tb01592.x 　

    ISSN： 0002-7820

  224. Sulfidation of Iron and Iron Oxide at 573 to 773 K Peer-reviewed

    T.Inaba, M.Sakuma, M.Watanabe, T.Narushima, C.Ouchi, Y.Iguchi

    Proceedings of the International Symposium on High-Temperature Corrosion and Protection 2000　143-148　2000/08

  225. Fatigue Properties of FES Electrodes in Saline Solution Peer-reviewed

    M. Watanabe, T. Kinami, T. Narushima, C. Ouchi, Y. Iguchi, Y. Handa, N. Hoshimiya

    Proceedings of the International Workshop on FES　24-27　2000/08

  226. Development of Implanted Bio-materials and Application to FES Electrodes as the Interface between Stimulator and Nerve Peer-reviewed

    Y.Iguchi, C.Ouchi, T.Narushima, M.Watanabe, T.Kinami, T.Nishikawa, N.Hoshimiya, Y.Handa

    Proceedings of 5th Annual Conference of the International Functional Electrical Stimulation Society　253-256　2000/07

  227. Collaboration and Technology Transfer between Universities and Industries on Development of Electrodes as the Interface for FES (Functional Electrical Stimulation) Peer-reviewed

    Y. Iguchi, T. Narushima, M. Watanabe, T. Kinami, N. Hoshimiya, Y. Handa

    Proceedings of The International Conference on Steel and Society (ICSS2000)　396-401　2000/07

  228. Activity of Ga2O3 in B2O3 flux and standard free energies of formation of GaBO3 and InBO3 Peer-reviewed

    K Tajima, Y Hino, T Narushima, Y Iguchi

    MATERIALS TRANSACTIONS JIM　41　(6)　714-718　2000/06

    DOI： 10.2320/matertrans1989.41.714 　

    ISSN： 0916-1821

  229. High Temperature CO2 Gas Sensor Using Sr β Alumina Peer-reviewed

    G.He, T.Goto, T.Narushima, Y.Iguchi

    Proceedings of 4th East Asian Conference on Chemical Sensor　183-186　1999/10

  230. Electrical conductivity and ionic transference number of Sr and Baβ-aluminas Peer-reviewed

    G. He, T. Goto, T. Narushima, Y. Iguchi

    Solid State Ionics　124　(1)　119-124　1999/09/01

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0167-2738(99)00128-9 　

    ISSN： 0167-2738

  231. Evaluation of Fatigue Properties of High Nitrogen High Manganese Austenite Stainless Steel as an FES Electrode Peer-reviewed

    M.Watanabe, T.Narushima, T.Kinami, Y.Iguchi, N.Hoshimiya, Y.Handa

    Proceedings of 4th Annual Conference of the IFESS　121　121-123　1999/08

  232. Electrical conductivity of alkaline-earth metal β-aluminas and their application to a CO2 gas sensor Peer-reviewed

    G. He, T. Goto, T. Narushima, Y. Iguchi

    Solid State Ionics　121　(1)　313-319　1999

    Publisher: Elsevier Science Publishers B.V.

    DOI： 10.1016/S0167-2738(99)00063-6 　

    ISSN： 0167-2738

  233. Synthesis and Electrical Property Measurements of Baβ-Alumina in a BaO-MgO-Al_2O_3 System

    HE Gang, NARUSHIMA Takayuki, GOTO Takashi, HIRAI Toshio, IGUCHI Yasutaka

    Journal of the Ceramic Society of Japan　106　(1239)　1048-1050　1998/11/01

    Publisher: The Ceramic Society of Japan

    DOI： 10.2109/jcersj.106.1048 　

    ISSN： 1882-1022

    More details Close

    An ionic conductor, Ba β-alumina, was synthesized in a BaO-MgO-Al_2O_3 ternary system by solid state sintering at 2023 to 2073 K. The Ba β-alumina with a composition of BaO : MgO : Al_2O_3 = 1 : 1 : 5 was in a single phase. Its relative density was 96% of the theoretical density. The electrical conductivity of Ba β-alumina was 4.6 × 10^<-3> S・m^<-1> at 1673 K and the activation energy was 126.82 kJ・mol^<-1>. The mobile ion could be Ba^<2+>, and its ionic transport number was about 0.8 to 0.9 at 1073 to 1673 K.

  234. Synthesis and electrical property measurements of Ba beta-alumina in a BaO-MgO-Al2O3 system Peer-reviewed

    G He, T Narushima, T Goto, T Hirai, Y Iguchi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　106　(11)　1048-1050　1998/11

    DOI： 10.2109/jcersj.106.1048 　

    ISSN： 1882-0743

    eISSN： 1348-6535

  235. Effect of alloying elements on carbon solubility in liquid silicon equilibrated with silicon carbide Peer-reviewed

    K Yanaba, Y Matsumura, T Narushima, Y Iguchi

    MATERIALS TRANSACTIONS JIM　39　(8)　819-823　1998/08

    DOI： 10.2320/matertrans1989.39.819 　

    ISSN： 0916-1821

  236. High-temperature oxidation of CVD silicon carbide -passive/active oxidation and bubble formation Peer-reviewed

    T Goto, H Homma, T Hirai, T Narushima, Y Iguchi

    HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY, PROCEEDINGS　98　(9)　395-408　1998

  237. Preparation of Sr β-Alumina lonic Conductors and Their a.c. Impedance Measurements

    GANG He, HAYASAKA Yasukazu, NARUSHIMA Takayuki, GOTO Takashi, HIRAI Toshio, IGUCHI Yasutaka

    Journal of the Ceramic Society of Japan　105　(1228)　1067-1071　1997/12/01

    Publisher: The Ceramic Society of Japan

    DOI： 10.2109/jcersj.105.1067 　

    ISSN： 1882-1022

    More details Close

    β-alumina type ionic conductors were synthesized in the SrO-MgO-Al_2O_3 system by a direct sintering method and their electrical conductivity was measured at 873 to 1373 K by an a.c.impedance method in order to apply the β-alumina to solid electrolyte of a gas sensor at high temperatures. Sr β-aluminas in a single phase were obtained in the composition range of SrO : MgO : Al_2O_3=1 : 1 : 4.8-5.2. The bulk and grain boundary conductivities were separated from the total conductivity at SrO : MgO : Al_2O_3=1 : 1 : 4.8 and 1 : 1 : 5.0. The bulk conductivity of the Sr β-alumina was around 6.7×10^<-3> S・m^<-1> at 1373 K.

  238. Preparation of Sr beta-alumina ionic conductors and their ac impedance measurements Peer-reviewed

    H Gang, Y Hayasaka, T Narushima, T Goto, T Hirai, Y Iguchi

    JOURNAL OF THE CERAMIC SOCIETY OF JAPAN　105　(12)　1067-1071　1997/12

    DOI： 10.2109/jcersj.105.1067 　

    ISSN： 1882-0743

    eISSN： 1348-6535

  239. Solubility of carbon in liquid silicon equilibrated with silicon carbide Peer-reviewed

    K Yanaba, M Akasaka, M Takeuchi, M Watanabe, T Narushima, Y Iguchi

    MATERIALS TRANSACTIONS JIM　38　(11)　990-994　1997/11

    DOI： 10.2320/matertrans1989.38.990 　

    ISSN： 0916-1821

  240. Preparation of Sr β-alumina ionic conductors and their a.c. Impedance measurements

    He Gang, Yasukazu Hayasaka, Takayuki Narushima, Takashi Goto, Toshio Hirai, Yasutaka Iguchi

    Journal of the Ceramic Society of Japan　105　(12)　1067-1071　1997

    Publisher: Ceramic Society of Japan

    ISSN： 0914-5400

  241. Oxygen Distribution between Molten B2O3 Flux and Indium or Gallium Peer-reviewed

    Y.Iguchi, M.Kinoshita, Y.Hino, T.Narushima

    Proc. of 5th Int. Conf. on Molten Slags, Fluxes and Salts　317-320　1997/01

  242. Determination of Free Lime Contents in Slags by Solution Calorimetry Peer-reviewed

    Y.Muraki, T.Narushima, Y.Iguchi

    ISIJ International　36　(12)　243-246　1996/12

    Publisher: The Iron and Steel Institute of Japan

    DOI： 10.2355/isijinternational.36.Suppl_S243 　

    ISSN： 0915-1559

    More details Close

    Free lime content in slag was investigated using a solution calorimetric technique in order to clarify hydration behavior of the free lime. After confirmation of the agreement between the heat of hydration of pure CaO obtained by this method and the calculated value, the heats of hydration of slags with different free lime contents were measured. Good correlation between the free lime contents and the heats of the hydration was indicated though small amounts of calcium silicates, calcium aluminates, MgO and calcium ferrite in the slags might be hydrated in addition to the free lime.

  243. High-Temperature Oxidation of CVD Silicon-Based Ceramics Peer-reviewed

    T.Goto, T.Hirai, T.Narushima, Y.Iguchi

    Ceramic Transaction　71　245-257　1996/10

  244. Oxygen Distribution between Molten III Group Metals and B2O3 Flux Peer-reviewed

    Y.Iguchi, M.Kinoshita, D.Sajuti, S.Yoshida, Y.Hino, T.Narushima

    Proc. of Int. Symp. on Metall. and Mater. of Non-Ferrous Metals and Alloys　45-49　1996/10

  245. In situ observation of oxide films formed during thermal oxidation of SiC-B4C composite using Raman spectroscopy Peer-reviewed

    T Narushima, M Maruyama, H Arashi, T Goto, T Hirai, Y Iguchi

    CORROSION OF ADVANCED CERAMICS　113　99-104　1996

    DOI： 10.4028/www.scientific.net/KEM.113.99 　

    ISSN： 1013-9826

  246. Complex oxide films formed during thermal oxidation of liquid aluminum alloys Peer-reviewed

    Y Iguchi, T Narushima, M Marauyama, T Shiozawa, H Arashi

    DESIGN FUNDAMENTALS OF HIGH TEMPERATURE COMPOSITES, INTERMETALLICS, AND METAL-CERAMICS SYSTEMS　337-343　1996

  247. High-Temperature Oxidation Behavior of CVD SiC and Si3N4 Peer-reviewed

    T.Goto, T.Hirai, T.Narushima, Y.Iguchi

    Proc. 95' Beijing Inter. Conf. for Surface Science and Engineering　401-406　1995/09

  248. OXYGEN SOLUBILITY IN LIQUID SI-X (X=SB, B, P AND AS) ALLOYS Peer-reviewed

    T NARUSHIMA, K MATSUZAWA, M MAMIYA, Y IGUCHI

    MATERIALS TRANSACTIONS JIM　36　(6)　763-769　1995/06

    DOI： 10.2320/matertrans1989.36.763 　

    ISSN： 0916-1821

  249. DEVELOPMENT OF IN-SITU OBSERVATION SYSTEM FOR OXIDE-FILMS FORMED DURING THERMAL-OXIDATION USING RAMAN-SPECTROSCOPY Peer-reviewed

    T NARUSHIMA, N KIKUCHI, M MARUYAMA, H ARASHI, Y NISHINA, Y IGUCHI

    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN　81　(6)　607-612　1995/06

    DOI： 10.2355/tetsutohagane1955.81.6_607 　

    ISSN： 0021-1575

  250. High-Temperature Oxidation Behavior of CVD Silicon Carbide and Silicon Nitride Peer-reviewed

    T. Goto, T. Narusima, Y. Iguchi, T. Hirai

    Proc. 6th Symp. High-Performance Materials for Severe Environments　331-338　1995

  251. OXYGEN SOLUBILITY IN LIQUID GALLIUM AND LIQUID INDIUM Peer-reviewed

    T NARUSHIMA, D SAJUTI, K SAEKI, SY YOSHIDA, Y IGUCHI

    JOURNAL OF THE JAPAN INSTITUTE OF METALS　59　(1)　37-43　1995/01

    DOI： 10.2320/jinstmet1952.59.1_37 　

    ISSN： 0021-4876

    eISSN： 1880-6880

  252. HIGH-TEMPERATURE OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-NITRIDE IN A CARBON-MONOXIDE CARBON-DIOXIDE ATMOSPHERE Peer-reviewed

    T NARUSHIMA, T GOTO, J HAGIWARA, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　77　(11)　2921-2925　1994/11

    DOI： 10.1111/j.1151-2916.1994.tb04525.x 　

    ISSN： 0002-7820

  253. NITROGEN SOLUBILITY IN LIQUID SILICON Peer-reviewed

    T NARUSHIMA, N UEDA, M TAKEUCHI, F ISHII, Y IGUCHI

    MATERIALS TRANSACTIONS JIM　35　(11)　821-826　1994/11

    DOI： 10.2320/matertrans1989.35.821 　

    ISSN： 0916-1821

  254. HIGH-TEMPERATURE ACTIVE OXIDATION AND ACTIVE-TO-PASSIVE TRANSITION OF CHEMICALLY VAPOR-DEPOSITED SILICON-NITRIDE IN N-2 O-2 AND AR O-2 ATMOSPHERES Peer-reviewed

    T NARUSHIMA, T GOTO, Y YOKOYAMA, J HAGIWARA, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　77　(9)　2369-2375　1994/09

    DOI： 10.1111/j.1151-2916.1994.tb04607.x 　

    ISSN： 0002-7820

  255. High-Temperature Passive/Active Oxidation for CVD SiC and Si3N4 Peer-reviewed

    T.Goto, T.Narushima, Y.Iguchi, T.Hirai

    Ceramic Transactions　42　307-318　1994/08

  256. OXYGEN SOLUBILITY IN LIQUID SILICON Peer-reviewed

    T NARUSHIMA, K MATSUZAWA, Y MUKAI, Y IGUCHI

    MATERIALS TRANSACTIONS JIM　35　(8)　522-528　1994/08

    DOI： 10.2320/matertrans1989.35.522 　

    ISSN： 0916-1821

  257. Theoretical estimation of the effect of minor elements on the solubility of oxygen in silicon melt Peer-reviewed

    Y. Waseda, K. T. Jacob, Y. Iguchi, T. Narushima

    Journal of Crystal Growth　139　(3-4)　357-362　1994/05/02

    DOI： 10.1016/0022-0248(94)90188-0 　

    ISSN： 0022-0248

  258. ACTIVE-TO-PASSIVE TRANSITION AND BUBBLE FORMATION FOR HIGH-TEMPERATURE OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-CARBIDE IN CO-CO2 ATMOSPHERE Peer-reviewed

    T NARUSHIMA, T GOTO, Y YOKOYAMA, M TAKEUCHI, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　77　(4)　1079-1082　1994/04

    DOI： 10.1111/j.1151-2916.1994.tb07273.x 　

    ISSN： 0002-7820

  259. Active/Passive oxidation Behavior of CVD Silicon Carbide Peer-reviewed

    T. Goto, T. Narusima, Y. Iguchi, T. Hirai

    Proc. 5th Symp. High-Performance Materials for Severe Environments　375-382　1994

  260. ACTIVE TO PASSIVE TRANSITION IN THE HIGH-TEMPERATURE OXIDATION OF CVD SIC AND SI3N4 Peer-reviewed

    T GOTO, T NARUSHIMA, Y IGUCHI, T HIRAI

    CORROSION OF ADVANCED CERAMICS　267　165-176　1994

    ISSN： 0168-132X

  261. HIGH-TEMPERATURE ACTIVE OXIDATION OF CVD-SI3N4 IN N2-O2 ATMOSPHERE Peer-reviewed

    T NARUSHIMA, J HAGIWARA, N KIKUCHI, Y IGUCHI, T GOTO, T HIRAI

    ADVANCED MATERIALS '93, I - A & B　14　(A & B)　281-284　1994

  262. PHASE-DIAGRAMS OF THE GA2O3-B2O3 AND IN2O3-B2O3 BINARY-SYSTEMS Peer-reviewed

    D SAJUTI, M YANO, T NARUSHIMA, Y IGUCHI

    MATERIALS TRANSACTIONS JIM　34　(12)　1195-1199　1993/12

    DOI： 10.2320/matertrans1989.34.1195 　

    ISSN： 0916-1821

  263. HIGH-TEMPERATURE ACTIVE OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-CARBIDE IN CO-CO2 ATMOSPHERE Peer-reviewed

    T NARUSHIMA, T GOTO, Y YOKOYAMA, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　76　(10)　2521-2524　1993/10

    DOI： 10.1111/j.1151-2916.1993.tb03975.x 　

    ISSN： 0002-7820

  264. OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-NITRIDE IN DRY OXYGEN AT 1923-K TO 2003-K Peer-reviewed

    T NARUSHIMA, RY LIN, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　76　(4)　1047-1051　1993/04

    DOI： 10.1111/j.1151-2916.1993.tb05333.x 　

    ISSN： 0002-7820

  265. SOLUBILITY OF OXYGEN, NITROGEN AND CARBON IN LIQUID SILICON Peer-reviewed

    Y IGUCHI, T NARUSHIMA

    FIRST INTERNATIONAL CONFERENCE ON PROCESSING MATERIALS FOR PROPERTIES　437-440　1993

  266. Solubility of Ga2O3 or In2O3 in Liquid B2O3 Peer-reviewed

    D.Sajuti, M.Yano, T.Narushima, Y.Iguchi

    Proceedings of the 4th International Conference on Molten Slags and Fluxes　614-619　1992/06

  267. HIGH-TEMPERATURE OXIDATION OF CVD-SIC IN CO-CO2 ATMOSPHERE Peer-reviewed

    T NARUSHIMA, T GOTO, Y IGUCHI, T HIRAI

    HIGH TEMPERATURE CORROSION OF ADVANCED MATERIALS AND PROTECTIVE COATINGS　345-350　1992

  268. High-temperature active oxidation of CVD-Si3N4 in ArO2 atmosphere Peer-reviewed

    Takayuki Narushima, Yasutaka Iguchi, Takashi Goto, Toshio Hirai, Yoshio Yokoyama

    Solid State Ionics　53-56　(1)　265-269　1992

    DOI： 10.1016/0167-2738(92)90389-7 　

    ISSN： 0167-2738

  269. HIGH-TEMPERATURE ACTIVE OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-CARBIDE IN AN AR-O-2 ATMOSPHERE Peer-reviewed

    T NARUSHIMA, T GOTO, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　74　(10)　2583-2586　1991/10

    DOI： 10.1111/j.1151-2916.1991.tb06803.x 　

    ISSN： 0002-7820

  270. HIGH-TEMPERATURE OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-CARBIDE IN WET OXYGEN AT 1823 TO 1923-K Peer-reviewed

    T NARUSHIMA, T GOTO, Y IGUCHI, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　73　(12)　3580-3584　1990/12

    DOI： 10.1111/j.1151-2916.1990.tb04261.x 　

    ISSN： 0002-7820

  271. HIGH-TEMPERATURE PASSIVE OXIDATION OF CHEMICALLY VAPOR-DEPOSITED SILICON-CARBIDE Peer-reviewed

    T NARUSHIMA, T GOTO, T HIRAI

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY　72　(8)　1386-1390　1989/08

    DOI： 10.1111/j.1151-2916.1989.tb07658.x 　

    ISSN： 0002-7820

  272. Active to Passive Transition in the Oxidation of CVD-SiC Peer-reviewed

    T. Narushima, T. Goto, T. Hirai

    Proc. the Materials Research Society International Meeting on Advanced Materials　4　295-300　1989/04

Show all ︎Show first 5

Misc. 92

  1. Effect of oxygen on the microstructure and mechanical properties of α+β-type Ti–5Nb alloys for biomedical applications

    K. Ueda, Y. Hirose, T. Narushima

    Proceedings of the 15th World Conference on Titanium (Ti-2023), Chapter 3　62-66　2024/10

  2. Fabrication of carbon-doped TiO2 layers via Ti oxidation and evaluation of their antibacterial activity

    R. Koizumi, K. Ueda, K. Ito, K. Ogasawara, T. Narushima

    Proceedings of the 15th World Conference on Titanium (Ti-2023), Chapter 2　46-49　2024/10

  3. Theoretical investigation of oxidation mechanism in Ti and its alloys

    R. Sahara, S.K. Bhattacharya, K. Kohli, P. Ghosh, K. Ueda, T. Narushima

    Proceedings of the 15th World Conference on Titanium (Ti-2023), Chapter 2　58-60　2024/10

  4. Preparation and evaluation of visible-light-responsive photocatalytic TiO2 layes to provide antibacterial activity on titanium Invited Peer-reviewed

    K. Ueda, T. Narushima and R. Koizumi

    Kinzoku, Materials Science & Technology　94　(3)　233-238　2024/03

  5. Reactions between Ti and light elements Invited

    Takayuki Narushima

    J. Jpn. Inst. Titanium　1　(1)　20-27　2023/08

  6. Recent activities of titanium research in academia Invited

    Takayuki Narushima

    Japan Titanium Society's 70th Anniversary Magazine –Toward a Sustainable World through Maturity and Transformation–　99-115　2023/02

  7. Antibacterial surface treatment of titanium alloys Invited Peer-reviewed

    T. Narushima, K. Ueda, R. Koizumi

    J. Surf. Finish. Soc. Jpn.　72　(11)　616-621　2021/11

    Publisher: The Surface Finishing Society of Japan

    DOI： 10.4139/sfj.72.616 　

    ISSN： 0915-1869

    eISSN： 1884-3409

  8. Antibacterial Functionalization of Ti-based Biomaterials Based on the Understanding of the Inactivation Mechanisms of Bacteria via Photocatalytic Activity of Titanium Oxide: Visible-light Responsive Reaction of Titanium Oxide Coating Invited Peer-reviewed

    Kyosuke Ueda, Takatoshi Ueda, Takayuki Narushima

    Materia Japan　59　(11)　612-617　2020/11/01

    Publisher: Japan Institute of Metals

    DOI： 10.2320/materia.59.612 　

    ISSN： 1340-2625

    eISSN： 1884-5843

  9. Experimental and theoretical oxidation study of Ti–6Al–4V alloys with added Si Invited

    T. Narushima, K. Ueda, R. Sahara, S.K. Bhattacharya

    Titanium Japan　68　(4)　328-335　2020/10

  10. Controlling bio-dissolution of amorphous calcium phosphate and applying antibacterial activity to Ti as a carrier of Ag Invited Peer-reviewed

    K. Ueda, T. Narushima

    J. Jpn. Soc. Biomat.　38　(4)　242-247　2020/10

  11. Formation of titania coating layer on Ti-Au alloy by thermal oxidation and its antibacterial property through photocatalytic activity under visible-light irradiation Invited Peer-reviewed

    K. Ueda, T. Ueda, T. Narushima

    JCS-Japan　55　(3)　146-149　2020/03

  12. Multifunctionalization through surface treatment of metallic biomaterials Invited

    NARUSHIMA Takayuki

    Chemistry Today　587　51-53　2020/02

  13. Surface treatment of metallic biomaterials Invited Peer-reviewed

    NARUSHIMA Takayuki

    The special steel　68　(5)　45-48　2019/09

  14. Ti-17合金の時効析出に及ぼす酸素濃度の影響

    上田恭介, 福島涼太, 北嶋具教, 成島尚之

    日本金属学会講演概要(CD-ROM)　164th　2019

    ISSN： 2433-3093

  15. Special Issue on Latest Research and Development of Structural and Functional Titanium-Based Materials PREFACE

    Takayoshi Nakano, Takayuki Narushima, Takao Hanawa, Masato Ueda, Yoko Yamabe-Mitarai, Tadashi Furuhara, Hideki Hosoda, Mitsuo Niinomi

    MATERIALS TRANSACTIONS　60　(9)　1732-1732　2019

    DOI： 10.2320/matertrans.MPR2019906 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  16. Coatings for improving bone compatibility of titanium Invited Peer-reviewed

    Kyosuke Ueda, Takatoshi Ueda, Naoki Sato, Takayuki Narushima

    J. Surf. Finish. Soc. Jpn.　68　(8)　341-345　2018/08

  17. High-temperature oxidation of titanium and its alloys Invited Peer-reviewed

    T. Narushima

    J. Jpn. Light Metals　68　(7)　354-365　2018/07

  18. Surface treatment of Ti and its alloys for biofunctionalization

    T. Narushima

    Titanium Japan　65　(4)　292-298　2017/10

  19. Ag含有非晶質リン酸カルシウムコーティングによる硬組織代替デバイスへの抗菌性と骨形成能の付与

    上田 恭介, 井上 紅花, 伊藤 甲雄, 小笠原 康悦, 成島 尚之

    日本骨形態計測学会雑誌　27　(1)　S140-S140　2017/05

    Publisher: 日本骨形態計測学会

    ISSN： 0917-4648

  20. Development of antibacterial biomaterials

    K. Ueda, T. Narushima

    Inflammation & Immunity　25　(2)　110-117　2017/03/01

  21. Transition and Prospect of Biomedical and Healthcare Materials from the Viewpoint of Surface Treatment

    Takayuki Narushima

    Materia Japan　56　(3)　215-219　2017/03/01

    Publisher: The Japan Institute of Metals and Materials

    DOI： 10.2320/materia.56.215 　

    ISSN： 1340-2625

  22. 電子ビーム積層造形(EBM)した生体用Co-Cr-Mo合金の組織と晶析出物分析

    小泉雄一郎, 魏代修, 山中謙太, 千葉晶彦, 植木洸輔, 上田恭介, 成島尚之

    日本金属学会講演概要(CD-ROM)　160th　2017

    ISSN： 2433-3093

  23. Ti-5Al-2Sn-2Zr-4Mo-4Cr(Ti-17)合金の大気中酸化挙動に及ぼすSi添加の影響

    鈴木聡, 上田恭介, BHATTACHARYA S.K., 佐原亮二, 北嶋具教, 成島尚之

    日本金属学会講演概要(CD-ROM)　160th　2017

    ISSN： 2433-3093

  24. NiTi and Co-Cr alloys used in biomedical stents

    T. Narushima, Alfirano, K. Ueda

    Proceedings of National Seminar of Metallurgy and Materials IX (SENAMM IX)　7-16　2016/10/11

  25. Titanium and its alloys

    M. Niinomi, M. Ikeda, E. Kobayashi, T. Narushima

    J. Jpn. Inst. Light Metals　66　(8)　468-470　2016/08/22

    Publisher: 軽金属学会

    ISSN： 0451-5994

  26. Ti-6Al-4V-xSi(x=0~1mass%)合金の耐酸化性と機械的特性

    前田幸大, 上田恭介, 北嶋具教, 池田亜矢子, 萩原益夫, 佐原亮二, 御手洗容子, 成島尚之

    日本金属学会講演概要(CD-ROM)　159th　2016

    ISSN： 2433-3093

  27. Ti-6242S合金の酸化挙動

    池田亜矢子, 北嶋具教, 萩原益夫, 江村聡, 佐原亮二, 成島尚之, 上田恭介

    日本金属学会講演概要(CD-ROM)　159th　2016

    ISSN： 2433-3093

  28. Special Issue on Advances in Biomedical Materials Science and Technology PREFACE

    Mitsuo Niinomi, Takao Hanawa, Takayuki Narushima, Takayoshi Nakano, Masahiko Ikeda

    MATERIALS TRANSACTIONS　57　(12)　1985-1985　2016

    DOI： 10.2320/matertrans.MPR2016905 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  29. The role of niobium ions in calcium phosphate invert glasses for bone regeneration

    A. Obata, H. Maeda, K. Ueda, T.Narushima, T. Kasuga

    Phosphorus Research Bulletin　30　30-34　2015/12/31

    Publisher: Japanese Association of Inorganic Phosphorus Chemistry

    DOI： 10.3363/prb.30.3 　

    ISSN： 0918-4783

    More details Close

    Abstract: Phosphate invert glasses (PIGs) containing niobium were prepared by a conventional melt-quenching method and the structures and chemical durability of the glasses and osteoblast-like cell responses to them were examined. Raman and solid state 31 P NMR spectra of the glasses demonstrated that two types of niobate groups, NbO4 and NbO6 units, were contained in the glasses and prepared to combine to pyrophosphate structure than orthophosphate one. The chemical durability in Tris-HCl solution was increased with the increase in the niobium content in the glasses, since niobium replaced to phosphorus and contributed to the formation of P-O-Nb and Nb-O-Nb bonds, which are stronger than P-O-P bond. The niobium ions released from the glasses enhanced the differentiation and mineralization of the cells, rather than the initial adhesion and proliferation. The upregulation of these cell functions by the niobium ions possessed doze-dependence; the medium containing 1 x 10-7 M of the ions exhibited the highest levels of the cell functions.

  30. 超高齢社会でのQOL向上に貢献するバイオマテリアル研究

    成島尚之

    Kawaijuku Guideline 2015　(11)　68-69　2015/11/15

  31. 金属系バイオマテリアルにおける表面改質

    成島尚之

    メカニカルサーフェス・テック　(028)　20-22　2015/10/25

    Publisher: メカニカル・テック社

  32. Titanium and its alloys

    M. Niinomi, M. Ikeda, E. Kobayashi, T. Narushima

    J. Jpn. Inst. Light Metals　65　(8)　377-380　2015/08/01

    Publisher: 軽金属学会

    ISSN： 0451-5994

  33. Surface and microstructure control of metallic biomaterials

    Narushima Takayuki

    The journal of the Japanese Society for Dental Materials and Devices　34　(2)　127-127　2015/03/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 1884-4421

  34. Osseoconduction by calcium phosphate coating

    K. Ueda, T. Narushima

    Journal of Japanese Society of Bone Morphometry　24　(1)　24-31　2014/01

  35. Surface treatment of titanium using thermal oxidation for biomedical applications

    Takayuki Narushima, Kyosuke Ueda, Shota Sado

    Zairyo to Kankyo/ Corrosion Engineering　63　(5)　295-300　2014

    Publisher: Japan Society of Corrosion Engineering

    DOI： 10.3323/jcorr.63.295 　

    ISSN： 1881-9664 0917-0480

  36. Fabrication of functional surface on metallic biomaterials using ceramic coating

    Takayuki Narushima, Kyosuke Ueda, Shota Sado

    Function & Materials　33　(9)　33-39　2013/09/01

    Publisher: シーエムシー出版

    ISSN： 0286-4835

  37. Special Issue on New Functions and Properties of Engineering Materials Created by Designing and Processing II PREFACE

    Mitsuo Niinomi, Tadashi Furuhara, Akihiko Chiba, Takayuki Narushima

    MATERIALS TRANSACTIONS　54　(8)　1241-1241　2013/08

    DOI： 10.2320/matertrans.MPR2013904 　

    ISSN： 1345-9678

    eISSN： 1347-5320

  38. Metallurgy of light elements present with titanium

    T. Narushima

    Titanium Japan　61　(2)　126-131　2013/04/01

  39. Precipitates in Biomedical Co-Cr Alloys

    Takayuki Narushima, Shingo Mineta, Yuto Kurihara, Kyosuke Ueda

    JOM　65　(4)　489-504　2013/04

    DOI： 10.1007/s11837-013-0567-6 　

    ISSN： 1047-4838

  40. The effect of amorphous calcium phosphate films by radiofrequency magnetron sputtering on TNTZ implants on integration with bone

    SHIRAISHI N, NARUSHIMA T, GOTO T, NIINOMI M, SUZUKI O, SASAKI K

    The journal of the Japanese Society for Dental Materials and Devices　31　(5)　385-385　2012/09/25

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 1884-4421

    More details Close

    Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) has excellent advantages as a biomaterial, such as low Young's modulus, low cytotoxicity, and the absence of allergens. However, it is unclear whether TNTZ can achieve sufficient osseointegration as a dental implant. The effectiveness of surface modification of TNTZ implants with amorphous calcium phosphate (ACP) by radiofrequency (RF) magnetron sputtering is also unclear. We investigated the biomechanical behaviors of TNTZ implants in vivo. The results suggest that TNTZ implants can achieve osseointegration similar to that of pure Ti, and that surface modification with ACP by RF magnetron sputtering improves osseointegration.

  41. On the Tohoku branch : History and activities

    NIINOMI Mitsuo, NARUSHIMA Takayuki

    61　(11)　605-606　2011/11/30

    ISSN： 0451-5994

  42. Titanium and its alloys

    M. Niinomi, M. Ikeda, T. Narushima

    J. Jpn. Light Metals　61　(11)　673-677　2011/11/01

  43. Research and Development of Metallic Biomaterials in Japan

    T. Narushima

    Proceeding: 4th NATIONAL SEMINAR of METALLURGY and MATERIAL　11-24　2010/07

  44. Special Issue on Low-Cost Reduction Processes, Roles of Low-Cost Elements and Interstitial Elements, and Microstructural Control for Generalization of Titanium Alloys PREFACE

    Mitsuo Niinomi, Takao Hanawa, Masahiko Ikeda, Akihiko Chiba, Tadashi Furuhara, Takayuki Narushima, Koichi Tsuchiya, Satoshi Emura, Takayoshi Nakano, Toshihide Takenaka

    MATERIALS TRANSACTIONS　50　(12)　2703-2703　2009/12

    ISSN： 1345-9678

    eISSN： 1347-5320

  45. New Market Opportunity (IV): Biomedical Application

    Takayuki Narushima

    The 61st Shiraishi Memorial Lecture, Strategies for the Highly Efficient Use of Titanium toward the Ubiquitous Ages and Titanium's New Market Opportunities　125-142　2009/10/09

    Publisher: The Iron and Steel Institute of Japan

  46. Special Issue on New Functions and Properties of Engineering Materials Created by Designing and Processing PREFACE

    Masahiko Morinaga, Mitsuo Niinomi, Tadashi Furuhara, Akihiko Chiba, Takayuki Narushima

    MATERIALS TRANSACTIONS　50　(7)　1612-1612　2009/07

    ISSN： 1345-9678

    eISSN： 1347-5320

  47. S109 Fabrication and Evaluation of Calcium Phosphate Coating Films on Blast-treated Ti-6Al-4V Substrate

    NARUSHIMA Takayuki, UEDA Kyosuke, GOTO Takashi, KURIHARA Jun, NAKAGAWA Hironobu, KAWAMURA Hiroshi

    The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME　2008　(0)　331-332　2009

    Publisher: 一般社団法人 日本機械学会

  48. S111 Effect of microstructure for apatite formation on Ca-P-O films prepared by CVD

    SATO Mitsutaka, TU Rong, GOTO Takashi, UEDA Kyosuke, NARUSHIMA Takayuki

    The Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME　2008　(0)　335-336　2009

    Publisher: 一般社団法人 日本機械学会

  49. J0401-2-3 Evaluation of Calcium Phosphate Coating Film on Titanium Substrate

    UEDA Kyosuke, KAWASAKI Yuuki, NARUSHIMA Takayuki, GOTO Takashi, KURIHARA Jun, KAWAMURA Hiroshi

    The proceedings of the JSME annual meeting　2009　(0)　271-272　2009

    Publisher: 一般社団法人 日本機械学会

    DOI： 10.1299/jsmemecjo.2009.6.0_271 　

    More details Close

    Amorphous calcium phosphate (ACP), oxyapatite (Ca_&lt;10&gt;(PO_4)_6O, OAp), heat-treated OAp (OAp-AIR) and OAp/OAp-AIR double layer (D-layer) coating films were fabricated on the surface of the titanium substrates using RF magnetron sputtering. The cross sectional observation before and after the implantation, bonding strength between coating film and substrates and removal torques from femur of Japanese white rabbits were examined. The bonding strength between coating films and substrates were more than 50 MPa, and removal torque of coated implants from the femur of Japanese white rabbits were greater than that of uncoated one. After the implantation of ACP coating film, the coating would be dissolved into the body and it caused the high biocompatibility of bone.

  50. Deoxidation of NiTi Alloy Melts Using Metallic Barium (vol 49, pg 289, 2008)

    Susumu Miyamoto, Masatoshi Watanabe, Takayuki Narushima, Yasutaka Iguchi

    MATERIALS TRANSACTIONS　49　(12)　2922-2922　2008/12

    ISSN： 1345-9678

    eISSN： 1347-5320

  51. Strategy for ubiquitous titanium alloys

    Mitsuo Niinomi, Takao Hanawa, Masahiko Ikeda, Akihiko Chiba, Tadashi Furuhara, Takayuki Narushima, Koichi Tsuchiya, Satoshi Emura, Takayoshi Nakano, Toshihide Takenaka

    Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals　72　(12)　915　2008/12

    DOI： 10.2320/jinstmet.72.915 　

    ISSN： 0021-4876

  52. Surface modification for improving biocompatibility of titanium materials with bone

    Takayuki Narushima

    Keikinzoku/Journal of Japan Institute of Light Metals　58　(11)　577-582　2008/11

    DOI： 10.2464/jilm.58.577 　

    ISSN： 0451-5994

  53. レーザーCVD法により合成したリン酸カルシウム膜のアパタイト形成能

    佐藤充孝, 塗溶, 後藤孝, 上田恭介, 成島尚之

    日本金属学会講演概要　142nd　2008

    ISSN： 1342-5730

  54. レーザーCVD法により合成したHAp膜上へのアパタイト形成の結晶配向依存性

    佐藤充孝, 塗溶, 後藤孝, 上田恭介, 成島尚之

    日本金属学会講演概要　143rd　2008

    ISSN： 1342-5730

  55. In vivo and vitro evaluation of titanium materials coated with calcium phosphate film

    NARUSHIMA Takayuki

    113　59-60　2007/10/10

  56. Surface treatment: Surface morphology and composition/phase control in metallic biomaterials

    T.Narushima

    J.Jpn.Soc.Biomat.　25　(3)　252-260　2007/08

  57. Surface modification of metals for medical applications

    NARUSHIMA Takayuki

    Journal of Japanese Society for Biomaterials　25　(4)　252-260　2007/07/15

    Publisher: 日本バイオマテリアル学会

    ISSN： 1347-7080

  58. PREFACE

    HOSODA Hideki, NAKANO Takayoshi, NARUSHIMA Takayuki, HANAWA Takao, NIINOMI Mitsuo, MIYAZAKI Shuichi

    48　(3)　277-277　2007/03/01

    ISSN： 1345-9678

  59. Special Issue on smart and harmonic biomaterials

    Hideki Hosoda, Takayoshi Nakano, Takayuki Narushima, Takao Hanawa, Mitsuo Niinomi, Shuichi Miyazaki

    MATERIALS TRANSACTIONS　48　(3)　277-277　2007/03

    ISSN： 1345-9678

    eISSN： 1347-5320

  60. Titanium and its alloys for medical applications

    T.Narushima

    Kinzoku, Materials Science & Technology　77　(2)　122-127　2007/02

  61. MOCVD法によるCa-Ti-OおよびCa-P-O傾斜機能バイオセラミックス膜の合成

    佐藤充孝, 塗溶, 後藤孝, 上田恭介, 成島尚之

    粉体粉末冶金協会講演概要集　2007　2007

  62. MOCVD法により合成したCa-P-O膜上への擬似体液中におけるアパタイト形成

    佐藤充孝, TU R., 後藤孝, 上田恭介, 成島尚之

    セラミックス基礎科学討論会講演要旨集　45th　2007

  63. MOCVD法により合成したCa-P-O膜の擬似体液中におけるHAp形成

    佐藤充孝, 塗溶, 後藤孝, 上田恭介, 成島尚之

    日本金属学会講演概要　140th　2007

    ISSN： 1342-5730

  64. Effect of oxygen partial pressure on electrical conductivity of Ca-Ru-O compounds prepared by spark plasma sintering

    Mitsutaka Sato, Rong Tu, Takashi Goto, Kyosuke Ueda, Takayuki Narushima

    Materials Science Forum　561-565　(0)　595-598　2007

  65. Elemental analysis of culture medium and macrophage RAW264 phagocytizing Ti ions by PIXE method

    TAIRA M., SASAKI K., SAITOH S., NEZU T., ARAKI Y., NARUSHIMA T.

    Journal of the Japanese Society for Dental Materials and Devices　25　(2)　181-181　2006/04/05

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  66. ハーモニックバイオマテリアル-界面制御型生体調和材料創製の可能性-MOCVD法により合成したCaTiO3膜の擬似体液中におけるHAp形成

    佐藤充孝, 塗溶, 後藤孝, 上田恭介, 成島尚之

    日本金属学会講演概要　138th　2006

    ISSN： 1342-5730

  67. Growth of HAp on the CVD CaTiO3 film in Hank's solution

    Tu Rong, Sato Mitsutaka, Goto Takashi, Ueda Kyosuke, Narushima Takayuki

    Preprints of Annual Meeting of The Ceramic Society of Japan<br>Preprints of Fall Meeting of The Ceramic Society of Japan　2006　(0)　591-591　2006

    Publisher: 公益社団法人 日本セラミックス協会

    More details Close

    縦型コールドウォール式ＣＶＤ装置を用い、Ca(dpm)&lt;sub&gt;2&lt;/sub&gt;およびTi(OiPr)&lt;sub&gt;2&lt;/sub&gt;(dpm)&lt;sub&gt;2&lt;/sub&gt;によりCaTiO&lt;sub&gt;3&lt;/sub&gt;膜を作製した。基板温度が973、1073 Kでは原料モル比が約1のとき、CaTiO3単一相が得られたが、873 KではCaTiO&lt;sub&gt;3&lt;/sub&gt;とCaOの混合相が得られた。膜の微細組織波、基板温度の上昇に伴いCaTiO&lt;sub&gt;3&lt;/sub&gt;膜の断面組織は緻密構造から柱状晶へと変化した。成膜速度は基板温度の上昇および反応室内圧力の減少とともに増大し、基板温度1073 K、反応室内圧力0.4 kPaでは最大であった。ハンクス溶液中におけるHApの生成を調べた。

  68. 特集「QOL向上のための材料技術」

    新家光雄, 塙隆夫, 千葉晶彦, 成島尚之, 福井壽男, 岡崎義光, 池田勝彦

    日本金属学会誌　70　(4)　259-259　2006

  69. Titanium and its alloys as biomaterials (J.Jpn.Inst.Light Metals)

    T. Narushima

    J.Jpn.Inst.Light Metals　55　(11)　561-565　2005/11

    DOI： 10.2464/jilm.55.561 　

  70. Effect of titanium ion on cell viability of macrophage-like RAW264 cells

    TAIRA M., SASAKI K., SAITOH S., NEZU T., ARAKI Y., NARUSHIMA T.

    Journal of the Japanese Society for Dental Materials and Devices　24　(5)　349-349　2005/09/05

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    ISSN： 0286-5858

  71. Special Issue on Medical, Healthcare, Sport and Leisure Materials - Preface

    M Niinomi, T Hanawa, Y Okazaki, M Ikeda, A Chiba, T Narushima, H Fukui

    MATERIALS TRANSACTIONS　46　(7)　1514-1514　2005/07

    ISSN： 1345-9678

    eISSN： 1347-5320

  72. Metallic biomaterials: Titanium and its alloys

    T.Narushima

    J.Jpn.Soc.Biomat.　23　(2)　86-95　2005/04

  73. Japanese research and development on metallic biomedical, dental, and healthcare materials

    M Niinomi, T Hanawa, T Narushima

    JOM　57　(4)　18-24　2005/04

    DOI： 10.1007/s11837-005-0076-3 　

    ISSN： 1047-4838

    eISSN： 1543-1851

  74. Hydrothermal synthesis of zeolite A from iron and steelmaking slag and crystalline Al_2O_3

    SUGANO Yoshiyuki

    18　(1)　205-205　2005/03/01

    ISSN： 0914-6628

  75. Effects of the Heating Temperature and Time on β Grain Growth in α+β Type Titanium Alloy containing a Small Amount of Yttrium

    HOTTA Satoshi

    18　(3)　690-690　2005/03/01

    ISSN： 0914-6628

  76. Effect of Y_2O_3 precipitates on refinement of β grain size and β grain growth behavior in titanium alloy

    HOTTA Satoshi

    18　(3)　P33　2005/03/01

    ISSN： 0914-6628

  77. Preface of Special Issue on Medical Healthcare, Sport and Lesure Materials

    M. Niinomi, T. Hanawa, Y. Okazaki, M. Ikeda, A. Chiba, T. Narushima, H. Fukui

    Mat. Trans.　46　(7)　0　2005

  78. Heat treating characteristics of newly developed α+β titanium alloy with the ultra fine microstructure for implant use

    HIRANO Takahiro, NARUSHIMA Takayuki, IGUCHI Yasutaka, OUCHI Chiaki

    106　181-182　2004/05/18

  79. Effect of dynamic recrystallization of austenite on micro segregation in a strand cast 9%Ni steel

    HOTTA Satoshi

    17　(1)　159-159　2004/03/01

    ISSN： 0914-6628

  80. Hydrothermal synthesis of zeolite-materials from iron and steel making slag

    NARUSHIMA Takayuki

    17　(1)　89-89　2004/03/01

    ISSN： 0914-6628

  81. Refinement of β grain size due to TiB or Y_2O_3 precipitates in PM titanium alloy

    YAMAMOTO Naoki

    16　(6)　1482-1482　2003/09/01

    ISSN： 0914-6628

  82. Effect on microalloy elements on austenitic grain growth behavior after dynamically recrystallization in as-cast HSLA steels

    FUJITA Noriki

    15　(6)　1152-1152　2002/09/01

    ISSN： 0914-6628

  83. Grain refinement of as-cast austenitic microstructure due to dynamic recrystallization and subsequent grain growth behavior in steels

    FUJITA Noriki

    15　(3)　615-615　2002/03/01

    ISSN： 0914-6628

  84. Refinement of austenitic gain size by precipitaed particles or dynamic recrystallization in as-casted

    OUCHI Chiaki

    14　(6)　1151-1154　2001/09/01

    ISSN： 0914-6628

  85. Stainless Steel Electrode for Functional Electrical Stimulation Based on Ultra Clean Refining Processes

    Y.Iguchi, T.Narushima, N.Hoshimiya, Y.Handa

    Bull.ISIJ,　4　(11)　737-740　1999/11

  86. Hydration of Lime-related Materials

    NARUSHIMA Takayuki

    12　(4)　826-826　1999/09/01

    ISSN： 0914-6628

  87. Hydration Mechanisms of Steelmaking Slag

    IZUMI Chihiro

    11　(4)　775-775　1998/09/01

    ISSN： 0914-6628

  88. <記事>(4) 溶融シリコン中の不純物元素の物理化学的挙動(主題 : 素材・材料プロセスに係わる物性と評価)(素材工学研究所第 6 回研究懇談会)(素材工学研究会記事)

    井口 泰孝, 成島 尚之, 東北大学大学院工学研究科, 東北大学大学院工学研究科

    東北大学素材工学研究所彙報 = Bulletin of the Institute for Advanced Materials Processing, Tohoku University　53　(1)　138-139　1998/03/27

    ISSN： 0919-4827

  89. High-temperature oxidation of silicon carbide and silicon nitride

    T Narushima, T Goto, T Hirai, Y Iguchi

    MATERIALS TRANSACTIONS JIM　38　(10)　821-835　1997/10

    DOI： 10.2320/matertrans1989.38.821 　

    ISSN： 0916-1821

  90. 東北大学工学部金属物理化学講座・研究紹介

    井口 泰孝, 成島 尚之, 渡辺 雅俊

    資源・素材　1996　(1)　104-104　1996/10/21

    ISSN： 0919-7915

  91. 太陽電池用シリコン製造プロセスにおける軽元素不純物の挙動に関する熱力学的研究

    井口 泰孝, 成島 尚之, 簗場 康司

    資源・素材　1996　(6)　12-12　1996/10/01

    ISSN： 0919-7915

  92. 口腔内児童骨炎長期の開発：ビーグル犬下顎骨への適用

    勝部朝之, 成島尚之, 中野貴由, 馬越佑吉, 佐々木具文, 伊藤秀美, 古屋泰文, 川村 仁

    日本実験力学学会論文集　(6月2日)　58-61　1994

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Books and Other Publications 20

  1. Fundamentals and Applications of Titanium

    M. Niinomi, M. Ikeda, T. Narushima, T. Nakano, H. Hosoda

    2023/03

    ISBN: 9784753651122

  2. 製品利用に向けたバイオマテリアル開発の基本事項と注意点―材料の特徴・材料 劣化・表面解析・安全性試験・ニーズ収集―

    上田恭介, 成島尚之

    情報機構　2022/06

    ISBN: 9784865022360

  3. Phosphate and Borate Bioactive Glasses

    K. Ueda, T. Narushima

    Royal Society of Chemistry　2022

  4. チタンの準安定相・析出相研究部会報告書

    T. Narushima, K. Ueda, Y. Hirose

    The Japan Institute of Light Metals　2020/10

  5. Metals for biomedical devices, Second Edition

    NARUSHIMA Takayuki

    Woodhead Publishing　2019/08

  6. Addition of Biocompatibility to Inorganic/Organic Materials by Surface Treatment and Modification

    NARUSHIMA Takayuki

    CMC Publishing Co.,Ltd.　2019/01

  7. Biomaterials: Fundamentals and Applications

    T. Narushima

    東京化学同人　2016/02/20

  8. Dental Restorative Materials and Regenerative Medicine

    T. Narushima, K. Ueda, T. Ueda, S. Sada

    CMC Pub. Co., Ltd　2015/08/25

  9. Advances in Metallic Biomaterials: Processing and Applications

    M. Hirohashi, K. Ueda, T. Wada, T. Narushima, H. Kato

    Springer　2015/06/27

    ISBN: 9783662468418

  10. Advances in Metallic Biomaterials: Tissues, Materials and Biological Reactions

    T. Narushima, K. Ueda, Alfirano

    Springer　2015/06/27

    ISBN: 9783662468357

  11. The advanced Research of Biomaterials

    Takayuki Narushima, Takayoshi Nakano

    Japan Institute of Metals　2014/10/31

  12. For future artificial joint

    T. Narushima

    NIHON IGAKUKAN　2013/07/01

  13. Technological Advancements in Biomedicine for Healthcare Applications

    T. Narushima, K. Ueda

    IGI Global　2012/09/30

  14. Biological and Biomedical Coatings Handbook: Processing and Characterization (Advances in Materials Science and Engineering)

    T. Goto, T. Narushima, K. Ueda

    CRC Press　2011/04

  15. Fundamentals of biomaterials for interdisciplinary integration

    T. Narushima

    NIHON IGAKUKAN　2010/11/25

  16. Metals for biomedical devices

    Takayuki Narushima

    Woodhead Publishing Limited　2010/04

  17. Forming and Microstructure of Metals

    Takayuki Narushima

    Kyoritsu Shuppan Co., Ltd.　2010/03/25

  18. Metals for Medicine

    T.Narushima

    Japan Institute of Metals　2010/03

  19. Basic Materials Science, Manufacturing and Newly Advanced Technologies of Titanium and its Alloys

    T. Narushima

    シーエムシー出版　2009/08

  20. 実験 材料科学 ニューマテリアル開発への基礎

    内田老鶴圃, 東北大学工学部マテリアル, 開発系学生実験委員会, 編

    1996/09/15

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Presentations 109

  1. Refining in titanium Invited

    Takayuki Narushima

    The Japan Titanium Society Carbon Neutral Subcommittee　2025/07/25

  2. Behavior of oxygen in titanium during hydrogen plasma melting

    T. Narushima, K. Ueda

    The Iron and Steel Institute of Japan Titanium Forum　2024/12/12

  3. Antibacterial and antiviral functionalization through titanium surface treatment Invited

    Takayuki Narushima

    The Japanese Society for Biomaterials Symposium 2024　2024/10/28

  4. Thermal oxidation of Ti and its application to surface treatment Invited

    T. Narushima

    Physics Seminar, Indian Institute of Science Education and Research, Pune, India　2024/03/04

  5. Surface and microstructure control of metallic biomaterials Invited

    T. Narushima

    Yukawa Memorial Lecture, Tohoku Branch. The Iron and Steel Institute of Japan　2023/12/03

  6. Recent trends in tanium R&D in Japan

    T. Narushima

    Japan Institute of Titanium 2023 Meeting (3rd)　2023/11/02

  7. Advancements of Ti research and development in Japan Invited

    T. Narushima

    2023 Fall Conference of the Korean Institute of Metals and Materials　2023/10/26

  8. Recent Activities of Titanium Research and Development in Japan Invited

    T. Narushima

    Titanium Technology Class　2023/08/24

  9. Recent Research and Development Activities on Titanium in Japan Invited

    T. Narushima, T. Hirose

    The 15th World Conference of Titanium (Ti-2023)　2023/06/12

  10. Antibacterial Functionalization of Titanium Surface Using Photocatalytic Activity of TiO2 Films Invited

    Takayuki Narushima

    Japan Institute of Metals 2022 Autumn Meeting (171st)　2022/09/21

  11. Antibacterial functionalization by surface treatment of titanium Invited

    T. Narushima

    2021 Joint Workshop of Institute of Materials Research, Tohoku University and Tohoku Block Meeting of the Japanese Society for Biomaterials　2021/09/29

  12. Thermodynamics of titanium and its alloys from the viewpoint of high temperature oxidation reaction Invited

    Takayuki Narushima

    Jointly hosted by the Japanese Institute of Titanium and the Industry-Academia Collaboration Committee of the Japan Titanium Society, the first web-based educational lecture on the fundamentals and applications of titanium in 2021.　2021/06/18

  13. Oxygen Removal from Ti melts using plasma Invited

    Takayuki Narushima

    The 8th Research Exchange Meeting for Titanium Researchers and Engineers　2021/03/04

  14. 金属系バイオマテリアルの表面・組織制御

    成島尚之

    東北大学材料科学ウェビナー　2020/09/07

  15. Thermodynamics in Materials Science and Engineering Invited

    2020/01/29

  16. 日本におけるチタン研究の動向 Invited

    成島尚之

    東邦チタニウム講演会　2020/01/22

  17. 金属チタン研究の最先端 Invited

    NARUSHIMA Takayuki

    日本機械学会2019年度年次大会　2019/09/09

  18. Preparation of bioceramic coatings on Ti and its alloys by dry processes and their antibacterial activity International-presentation Invited

    NARUSHIMA Takayuki

    the 10th Pacific Rim International Conference on Advance Materials and Processing (PRICM-10)　2019/08/21

  19. Recent Activities of Titanium Research and Development in Japan International-presentation Invited

    T. Narushima, Y. Sugizaki

    The 14th World Conference of Titanium (Ti-2019)　2019/06/11

  20. 日本チタン研究の最先端

    成島 尚之

    一般社団法人日本チタン協会, 2019年度通常総会記念講演会　2019/05/28

  21. 水素プラズマを利用したチタン融体からの酸素除去の可能性

    成島 尚之

    本金属学会チタン製造プロセスと材料機能研究会第5回講演会　2019/01/25

  22. Formation and Antibacterial Activity of TiO2 Layers on Ti-Au Alloys International-presentation Invited

    Takayuki Narushima, Kyosuke Ueda, Takatoshi Ueda, Naoki Sato

    15th International Symposium on Functionally Graded Materials　2018/08/07

  23. Antibacterial activity of TiO2 layers formed on Ti-Au alloys by thermal oxidation International-presentation Invited

    T. Narushima, T. Ueda, N. Sato, K. Ueda, K. Ito, K. Ogasawara, H. Kanetaka

    Finland-Japan Workshop: The next generation medical engineering in biomaterials, Joint with 3rd Bone and Biomaterials Workshop　2018/06/20

  24. Tiの高温酸化に及ぼすSiの影響に関する実験的・計算材料学的研究

    成島尚之, 上田恭介, 鈴木聡, 佐原亮二, Somesh Kr. Bhattacharya

    本金属学会チタン製造プロセスと材料機能研究会第4回講演会　2018/01/26

  25. ドライプロセスによる 金属系バイオマテリアル表面処理 の現状と展望

    成島尚之, 上田恭介, 鈴木聡, 佐原亮二, Somesh Kr. Bhattacharya

    日本金属学会2017秋期（第161回）講演大会　2017/09/06

  26. バイオマテリアルｰからだの中で活躍する材料ｰ

    成島 尚之

    東北大学 工学部・工学研究科技術一般研修　2017/08/01

  27. ステント用金属系バイオマテリアルの機械的特性

    成島尚之, 上田恭介, 鈴木聡, 佐原亮二, Somesh Kr. Bhattacharya

    SMAシンポジウム2016　2016/11/11

  28. NiTi and Co-Cr alloys used in biomedical stents International-presentation

    T. Narushima, Alfirano, K. Ueda

    National Seminar of Metallurgy and Materials IX (SENAMM IX)　2016/10/11

  29. Formation and evaluation of TiO2 layers on Ti alloys prepared by thermal oxidation

    成島 尚之

    4th AMED-CNPq project seminar and meeting　2016/09/05

  30. Surface modification of Ti using bio-ceramic coating International-presentation

    Takayuki Narushima, Takatoshi Ueda, Shota Sado, Kyosuke Ueda

    2nd Bone and Biomaterials Workshop Hotelli Inari, Inarintie 40, 99870 Inari, Finland　2016/08/07

  31. Biomaterials, Smart Materials and Structures International-presentation

    Takayuki Narushima

    The Ninth Pacific Rim International Conference on Advanced Materials and Processing (PRICM 9)　2016/08/01

  32. Precipitates and mechanical properties of metallic biomaterials International-presentation

    Takayuki Narushim

    Thermec’ 16, Intl’ Conf. on Processing & Manufacturing of Advanced Materials　2016/05/30

  33. ドライプロセスを用いたチタンの生体用表面改質

    成島尚之

    軽金属学会第130回春期大会　2016/05/28

  34. Fatigue properties of NiTi wires used in biomedical applications International-presentation

    Takayuki Narushima

    The 6th International Symposium for Interface Oral Health Science　2016/01/18

  35. レアメタル一次資源部門

    成島 尚之

    東北大学レアメタル・グリーンイノベーション研究開発センター 第一回フォーラム　2015/12/22

  36. 生体材料としてのチタン

    成島 尚之

    仙台青葉工業クラブ第42回講演会　2015/10/18

  37. 金属系バイオマテリアルと軽元素との反応

    成島尚之

    東北大学金属材料研究所共同研究ワークショップ、日本バイオマテリアル学会東北地域講演会　2015/09/07

  38. Formation and evaluation of thermally-oxidized titania layer on Ti and Ti alloys International-presentation

    Takayuki Narushima, Takatoshi Ueda, Shota Sado, Kyosuke Ueda

    Ti-2015: The 13th World Conference on Titanium　2015/08/16

  39. 金属系バイオマテリアルの表面・組織制御

    成島尚之

    第65回日本歯科理工学会学術講演会　2015/04/16

  40. 生体用NiTiの晶析出物と疲労特性

    成島 尚之, 原 健治, 上田 恭介, 山下 史祥, 石川 浩司

    東北大学金属材料研究所共同研究ワークショップ、日本バイオマテリアル学会東北地域講演会　2014/10/06

  41. 二段階熱酸化プロセスを利用した生体用チタンの表面処理

    成島尚之, 佐渡翔太, 近藤なつ美, 上田恭介

    第181回腐食防食シンポジウム　2014/09/16

  42. Reaction between light elements and metallic biomaterials: thermal oxidation and precipitation International-presentation

    T. Narushima

    156th IBB Seminar, JST-CNPq Project　2014/09/16

  43. 金属系バイオマテリアルの軽元素メタラジー

    成島尚之

    北海道大学工学研究院材料科学専攻 第51回マテリアルセミナー　2014/05/27

  44. Photocatalytic evaluation of TiO2 layer formed on titanium by thermal oxidation International-presentation

    T. Narushima, S. Sado, K. Ueda, M. Kawano, K. Ogasawara

    Innovative Research for Biosis-Abiosis Intelligent Interface Symposium　2014/01/20

  45. Formation of anatase layer using two-step thermal oxidation and its evaluation International-presentation

    T. Narushima, K. Ueda, S. Sado

    5th International Symposium on Advanced Ceramics (ISAC-5)　2013/12/09

  46. Precipitates and properties of biomedical Co-Cr-W-Ni alloys International-presentation

    T. Narushima, Y. Kurihara, K. Ueda

    International Conference on Processing & Manufacturing of Advanced Materials (THERMEC’ 2013)　2013/12/02

  47. 金属材料のセラミックスコーティング

    成島尚之, 上田恭介

    学振第176委員会（加工プロセスによる材料機能発現）第24回研究会　2013/11/01

  48. Surface treatments of titanium using thermal oxidation International-presentation

    T. Narushima, K. Ueda, S. Sado

    The Eighth Pacific Rim International Conference on Advanced Materials and Processing (PRICM-8)　2013/08/04

  49. チタン系融体の脱酸と析出物への影響

    成島尚之, 上田恭介, 伊藤大介, 西脇成彦

    日本金属学会機能性チタン合金研究会　2013/01/28

  50. ドライプロセスによるバイオセラミックス被覆

    成島尚之

    日本バイオマテリアル学会シンポジウム2012　2012/11/26

  51. Bioceramic Coating on Titanium Using Dry Process International-presentation

    T. Narushima

    The 5th International Symposium on Designing, Processing and Properties of Advanced Engineering Materials ISAEM-2012　2012/11/05

  52. Precipitates in biomedical Co-Cr-Mo alloys International-presentation

    T. Narushima

    Korea-Japan Joint Work Shop on Biomaterials　2012/09/25

  53. 生体用Co-Cr-Mo合金における晶析出挙動

    成島尚之

    日本金属学会 2012年秋季（第151回）大会 公募シンポジウム「体用Co-Cr合金研究の現状と将来展望」　2012/09/17

  54. 熱酸化法によるチタン表面へのアナターゼ形成と評価

    成島尚之

    東北大学金属材料研究所共同研究ワークショップ、日本バイオマテリアル学会東北地域講演会　2012/09/03

  55. Precipitation in biomedical Co-Cr and NiTi alloys International-presentation

    T. Narushima

    The Japan-Finland Joint Workshop on Future Implant, Research Seminar in Oulu　2012/08/08

  56. Surface modification of titanium using dry process International-presentation

    T. Narushima

    The Japan-Finland Joint Workshop on Future Implant, Research Seminar in Helsinki　2012/08/06

  57. 金属系生体材料における軽元素メタラジー

    成島尚之

    東北大学学際科学国際高等研究センター 第48回インフォーマルセミナー　2012/02/24

  58. Precipitates in biomedical Co-Cr-Mo and NiTi alloys International-presentation

    T. Narushima

    Workshop on a foreign experts academic exchange project　2011/11/02

  59. Fabrication and Evaluation of Amorphous Calcium Phosphate Film on Titanium International-presentation

    T. Narushima, K. Ueda, T. Goto, N. Nishiwaki, S. Yokota, H. Kawamura

    Workshop on Materials Science in Tianjin University Day　2011/10/11

  60. 金属系バイオマテリアル中の析出相

    成島尚之

    東北大学金属材料研究所共同研究ワークショップ、日本バイオマテリアル学会東北地域講演会　2011/09/29

  61. Deoxidation of NiTi alloys using metallic barium and their microstructures International-presentation

    T. Narushima, D. Ito, K. Ueda

    The 12th World Conference on Titanium　2011/06/20

  62. Precipitates in Metallic Biomaterials International-presentation

    T. Narushima

    The 4th International Symposium for Interface Oral Health Science　2011/03/07

  63. ドライプロセスを利用したチタン系材料の表面・バルク処理

    成島尚之

    日本鉄鋼協会・日本金属学会関西支部 材料開発研究会 平成２２年度第４回研究会　2011/01/20

  64. Surface Modification of Titanium for Biomedical Applications International-presentation

    Takayuki Narushim

    The 1st Joint Workshop on Advanced Materials Research & Application, Dalian University of Technology - Tohoku University　2010/11/03

  65. 生体用Co-Cr-Mo合金中の析出物形成および溶解挙動

    成島尚之, 峯田真悟, Alfirano, 難波茂信, 米田隆志, 上田恭介

    東北大学金属材料研究所共同研究ワークショップ、日本バイオマテリアル学会東北地域講演会、金属系バイオマテリアルの力学的および生物学的生体機能性の付与－骨機能再建・再生マテリアルの創製に向けて－　2010/08/30

  66. Calcium Phosphate Coating on Titanium Using Dry Process International-presentation

    Takayuki Narushima

    The Seventh Pacific Rim International Conference on Advanced Materials and Processing (PRICM7)　2010/08/01

  67. Research and Development of Metallic Biomaterials in Japan International-presentation

    Takayuki Narushima

    Special Seminar in Research Center for Metallurgy　2010/07/16

  68. Research and Development of Metallic Biomaterials in Japan International-presentation

    Takayuki Narushima

    4th National Seminar of Metallurgy and Material　2010/07/14

  69. Surface treatment of titanium by gas processes International-presentation

    Takayuki Narushima

    International Cooperation between KITECH and Tohoku University　2010/02/25

  70. 金属系生体材料の高機能化

    成島尚之

    MAST21 第14回フォーラム　2009/11/27

  71. ガス法によるチタン材料の表面硬化処理

    成島尚之

    日本金属学会 機能性チタン合金研究会第２回講演会　2009/11/20

  72. Surface modification of titanium by dry process for biomedical applications International-presentation

    T. Narushima, K. Ueda, T. Goto

    the 9th International Symposium on Biomaterials　2009/10/29

  73. ユビキタス時代に向けたチタンの元素戦略と新しい用途展開 『新しい用途展開(Ⅳ) 生体・医療用途』

    成島尚之

    第61回白石記念講座　2009/10/09

  74. 骨/リン酸カルシウムコーティング膜/チタンインプラント界面の力学特性

    成島尚之, 上田恭介, 後藤孝

    日本金属学会 2009年秋季（第145回）大会 公募シンポジウム「力学的生体適合性」　2009/09/15

  75. Surface modification of titanium by pack cementation process for biomedical applications International-presentation

    Takayuki NARUSHIMA

    The third International Conference on Processing, Manufacturing of Advanced Materials (ICAM-2009)　2009/07/08

  76. Fabrication and Evaluation of Calcium Phosphate Films Coated on Blast-treated Ti-6Al-4V Substrate International-presentation

    Takayuki NARUSHIMA

    International Conference on Materials for Advanced Technologies (ICMAT 2009)　2009/06/28

  77. 金属系生体材料製造プロセスにおける軽元素の挙動

    成島尚之

    第126回特殊鋼部会大会　2009/06/04

  78. Calcium phosphate coating on titanium by RF magnetron sputtering International-presentation

    KIM-JIM Symposium　2009/03/29

  79. 酸素を利用したチタンの表面・組織制御

    成島尚之

    第34回 材質制御研究会―歯科材料を中心した生体材料開発の最前線―　2008/12/26

  80. In vivo and in vitro evaluation of amorphous calcium phosphate films coated on titanium implants by RF magnetron sputtering International-presentation

    T. Narushima

    4th International Symposium on Designing,Processing and Properties of Advanced Engineering Materials (ISAEM-2008)　2008/11/18

  81. Calcium phosphate formation on NaOH-treated titanium in simulated body fluids International-presentation

    Takayuki Narushima, Shuntaro Watanabe, Kenichi Kato, Kyosuke Ueda

    the 2008 Fall Annual Meeting of the KIM, 2008 Fall Conference　2008/10/23

  82. Amorphous Calcium Phosphate Thin Film Coated on Titanium Implant by RF Magnetron Sputtering International-presentation

    T. Narushima

    2nd PNU – IMR Joint Workshop on Advanced and Bio Materials　2008/06/06

  83. リン酸カルシウムコーティングを施したチタン材料の生体内外評価

    成島尚之

    社団法人軽金属学会第１１３回大会　2007/11/10

  84. In vivo and In vitro Evaluation of Calcium Phosphate Coating Films on Blast-treated Titanium Substrate International-presentation

    T. Narushima, K.Ueda, T.Goto, H.Kawamura, T.Katsube

    Symposium on the Nano Particles and Highly-functional Interface Science　2007/08/09

  85. Fatigue Properties of Titanium Wires for Medical Applications International-presentation

    K.Ueda, T.Kinami, H.Kimura, C.Ouchi, Y.Iguchi

    The 11th World Conference on Titanium　2007/06/03

  86. Calcium Phosphate Coating on Titanium by RF Magnetron Sputtering for Medical Applications International-presentation

    T. Narushima

    The joint symposium on advanced materials between Pusan nationals university and Tohoku university　2007/05/07

  87. チタン上に作製したリン酸カルシウムスパッタリング膜の生体内外評価

    成島尚之

    東北大学金属材料研究所共同研究ワークショップ　2006/12/13

  88. Evaluation of Calcium Phosphate Coating Films on Titanium Fabricated Using RF Magnetron Sputtering International-presentation

    T. Narushima, K. Ueda, T. Goto, M. Taira, T. Katsube

    the 4th Korea-China Symposium on Biomaterials and Nano-bio Technology　2006/10/19

  89. Evaluation of RF-magnetron-sputtered calcium phosphate films on titanium for implant applications International-presentation

    T. Narushima

    The 2nd. Korean-Japan joint workshop on biomedical materials　2006/10/09

  90. Calcium Phosphate Coating on Titanium by RF Magnetron Sputtering for Medical Applications International-presentation

    T. Narushima

    Thermec’2006, International Conference on Processing & Manufacturing of Advanced Materials　2006/07/04

  91. Calcium Phosphate Coating on Titanium by RF Magnetron Sputtering for Medical Applications International-presentation

    T. Narushima

    Non-ferrous Metal Seminar between China and Japan　2006/03/15

  92. Calcium Phosphate Films Coated on Titanium by RF Magnetron Sputtering International-presentation

    T. Narushima

    Korea-Japan Symposium on Nano-Bio Technology –Interdisciplinary Science of Nanomaterials for Asia Core Program-　2006/02/14

  93. リン酸カルシウムコーティングによるチタン材料の生体機能化

    成島尚之

    学術討論会 若手生体材料研究者が目指す金属とセラミックス、高分子とのインテグレート生体機能材料　2006/01/16

  94. Characterization of Calcium Phosphate Films Prepared by RF Magnetron Sputtering International-presentation

    T. Narushima

    The 1st Korean-Japan joint workshop on biomedical materials　2005/12/12

  95. Characterization of Calcium Phosphate Films Prepared by RF Magnetron Sputtering International-presentation

    T. Narushima

    2005 MRS Fall Meeting　2005/11/28

  96. 東北大学先進医工学研究機構における生体材料に関する研究

    成島尚之

    東北大学 素材・材料開発研究会　2005/06/10

  97. Evaluation of Fatigue Property of Titanium Wires by Rotating-bending Testing in 1mass% Lactic Acid Solution International-presentation

    T. Narushima, K.Ueda, M.Yamashita, T.Murakami, C.Ouchi, Y.Iguchi

    The 9th Annual Conference of the International Functional Electrical Stimulation Society　2004/09/05

  98. Bio-materials Researches at Tohoku University International-presentation

    T. Narushima, T.Katsube, C.Ouchi, Y.Iguchi

    Symposium on Materials Science in Japan, China, and Korea　2004/06/15

  99. 新しい生体用チタン合金の研究開発動向とその課題

    成島尚之

    第17回歯科チタン学会　2004/02/14

  100. Nitridation of Titanium-Tin Alloys during Heating in Air International-presentation

    T. Narushima, K.Suzuki, S.Kimura, Y.Iguchi, C.Ouchi

    The 10th World Conference on Titanium　2003/07/13

  101. Refinement of β Grain Size Due to TiB or Y2O3 Precipitates in Titanium Alloy International-presentation

    T. Narushima, K.Suzuki, S.Kimura, Y.Iguchi, C.Ouchi

    The 10th World Conference on Titanium　2003/07/13

  102. Calorimetric Study on Hydration of CaO-based Oxides International-presentation

    T. Narushima, Y.Iguchi, C.Izumi

    Kleppa Symposium, 2000 Annual Spring Meeting, TMS　2000/03

  103. Oxygen Distribution between Molten B2O3 Flux and Indium or Gallium International-presentation

    T. Narushima, Y.Iguchi, M.Kinoshita, Y.Hino

    The 5th International Conference on Molten Slags, Fluxes and Salts　1997/01

  104. Determination of Free Lime Contents in Slags by Solution Calorimetry International-presentation

    T. Narushima, Y.Muraki, Y.Iguchi

    ICS'96　1996/04

  105. In situ Observation of Oxide Films Formed during Thermal Oxidation of SiC-B4C Composite International-presentation

    T. Narushima, M.Maruyama, H.Arashi, T.Goto, T.Hirai, Y.Iguchi

    European Ceramic Society 4th Conference　1995/09

  106. High-Temperature Active Oxidation of CVD-Si3N4 in N2-O2 Atmosphere International-presentation

    T. Narushima

    Advanced Materials '93　1993/10

  107. High-Temperature Active Oxidation of CVD-Si3N4 in Ar-O2 Atmosphere International-presentation

    T. Narushima, Y.Iguchi, T.Goto, T.Hirai, Y.Yokoyama

    SSI-8　1991/10

  108. High-Temperature Oxidation of CVD-SiC in CO-CO2 Atmosphere International-presentation

    T. Narushima, T.Goto, Y.Iguchi, T.Hirai

    High Temperature Corrosion of Advanced Materials and Protective Coatings　1990/11

  109. Active to Passive Transition in the Oxidation of CVD-SiC International-presentation

    T. Narushima, T.Goto, T.Hirai

    MRS International Meeting on Advanced Materials　1988/06

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Industrial Property Rights 13

  1. NiTi系合金材料、NiTi系合金の製造方法、NiTi系合金材料からなる線材または管材、およびその製造方法

    山下史祥、喜瀬純男、藤井美里、石川浩司、成島尚之、上田恭介、加藤卓

    Property Type: Patent

    Holder: 国立大学法人東北大学、株式会社古河テクノマテリアル

  2. チタン素材の脱酸方法

    松若大介, 成島尚之, 上田恭介

    Property Type: Patent

    Holder: 株式会社神戸製鋼所

  3. METHOD FOR PURIFYING TITANIUM MATERIAL

    MATSUWAKA Daisuke, NARUSHIMA Takayuki, UEDA Kyosuke

    Property Type: Patent

    Holder: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)

  4. 光触媒機能性部材およびその製造方法

    成島尚之, 上田恭介, 上田隆統志, 佐渡翔太, 小笠原康悦, 伊藤甲雄, 金高弘恭

    Property Type: Patent

    Holder: 国立大学法人東北大学

  5. 耐熱Ti合金および耐熱Ti合金材

    成島尚之, 上田恭介, 前田幸大, 鈴木聡

    Property Type: Patent

    Holder: 国立大学法人東北大学

  6. Ti-Si系合金の脱酸方法

    松若大介, 成島尚之, 上田恭介, 渡辺将仁

    Property Type: Patent

  7. NiTi系超弾性合金材料または形状記憶合金材料及びこれを用いた線材または管材

    成島尚之, 上田恭介, 原健治, 山下史祥, 石川浩司

    Property Type: Patent

  8. チタン合金とアルミニウム材料の接合方法

    村上太一, 大内千秋, 成島尚之, 井口泰孝

    Property Type: Patent

  9. 自動骨延長用装置及びその使用方法

    成島尚之, 勝部朝之, 川村仁

    Property Type: Patent

  10. 酸化物の還元反応を利用した発泡金属製造法

    村上太一, 成島尚之, 井口泰孝, 大内千秋

    Property Type: Patent

  11. 産業副生成物からのマグネシウム及びカルシウム除去回収とA型ゼオライト製造方法

    村上太一, 成島尚之, 井口泰孝, 大内千秋, 菅野善之

    Property Type: Patent

  12. ゼオライトの製造方法

    成島尚之, 井口泰孝, 大内千秋, 木浪常利, 菅野善之

    Property Type: Patent

  13. Ca-βアルミナとジルコニア固体電解質よりなる結合型ガスセンサー

    鹿野弘, 会田広治, 井口泰孝, 成島尚之, 中澤壮三

    Property Type: Patent

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Research Projects 36

  1. Development of photo-functional antibacterial and antiviral material surfaces considering bacterial adhesion and virus adsorption

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2025/04/01 - 2028/03/31

  2. Development of antibacterial-expressing self-maintenance implant surfaces using biological window

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2024/04/01 - 2028/03/31

  3. ノンパラメータ階層計算技術による耐熱材料設計

    佐原 亮二, 成島 尚之, 大野 かおる, 上田 恭介

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 国立研究開発法人物質・材料研究機構

    2024/04/01 - 2027/03/31

  4. Innovation of titanium smelting and refining process using hydrogen plasma

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Pioneering)

    Institution: Tohoku University

    2022/06/30 - 2025/03/31

  5. Materials surface design to inactivate coronaviruses by focusing on spike proteins

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2021/04/05 - 2025/03/31

  6. 表面化学反応機構の理論的解明による耐熱材料の高精度制御

    佐原 亮二, 成島 尚之, 上田 恭介

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 国立研究開発法人物質・材料研究機構

    2021/04/01 - 2024/03/31

  7. Functionalization of implant by bio-active coating with ion release and high bonding strength

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2020/04/01 - 2024/03/31

  8. Creation of optically-functional titanium surface with compatibility of bone forming ability and antibacterial activity and its application to implants

    Narushima Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2018/04/01 - 2022/03/31

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    We succeeded in fabricating a Ti surface with both osteogenic and antibacterial properties for application to dental implants. The Au-containing TiO2 layers prepared on the Ti surface by an original process based on Au-sputtering and thermal oxidation showed antibacterial activity against E. coli under visible-light irradiation. The photofunction of the Au-containing TiO2 layers obtained in this study is considered to be an achievement to realize the “self-maintenance function” in which the implant itself plays a role in “healing” by reattaching to bone tissue and also enables “prevention” by patients themselves. These results, together with the excellent adhesion between the TiO2 layers and the Ti substrates, are expected to be applied not only to dental implants but also to the prevention of contact infection of the new coronavirus (SARS-CoV-2).

  9. Removal of oxygen from titanium melt using hydrogen plasma arc: Challenge to 300 ppm

    Narushima Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2018/06/29 - 2020/03/31

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    The oxygen removal process from titanium melt, which was considered difficult in the past, has been established. The process consists of hydrogen plasma arc melting (first-step melting) and argon plasma arc melting (second-step melting). Oxygen removal from 0.127 mass% (1270 mass ppm) to 0.034 mass% (340 mass ppm) was achieved in the titanium melt by optimizing in melting conditions such as hydrogen partial pressure, melting time, gas flow rate and plasma current. Thermodynamic consideration suggested that the dissolved hydrogen introduced into titanium melt in response to the high hydrogen potential of active atomic hydrogen in plasma functions as a deoxidizer in the second-step melting. An international patent application was filed based on the results of this research.

  10. Release Release of bone morphogenetic protein using amorphous calcium phosphate film as a carrier

    UEDA KYOSUKE

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2017/04/01 - 2020/03/31

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    The surface treatment process for both improving the bone compatibility and achieving antibacterial property on Ti implants was established by focusing on the dissolution of amorphous calcium phosphate (ACP). Bone morphogenetic protein (BMP) was loaded on the surface of the ACP coating films fabricated by RF magnetron sputtering. Sustained release of BMP through the dissolution of ACP coating film was observed. Ag- and Ta- co-added ACP coating film was fabricated by controlling the composition of the target during the sputtering process. The dissolution of Ag-added ACP coating films in simulated body fluids was suppressed by the addition of Ta in the coating film. It was estimated that the long-term antibacterial activity and improving the bone formation of the Ti implants by the release of Ag ion and ACP coating films, respectively.

  11. Fabrication of drug-release type implant using amorphous calcium phosphate film as a carrier

    Ueda Kyosuke, KANETAKA Hiroyasu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04/01 - 2017/03/31

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    Bone morphogenetic protein (BMP) was loaded on amorphous calcium phosphate (ACP) film by immersion in BMP-2 solution. The releasing behavior of BMP-2 from ACP film was evaluated. The amount of BMP-2 loaded on ACP film by immersion in PBS(-) without heparin was higher than that with heparin. The BMP-2 loaded on ACP film by immersion in PBS(-) without heparin was released continuously for 12 h.

  12. Construction of a new implant recovery system by low-temperature plasma jet irradiation

    Kanetaka Hiroyasu, SASAKI Keiichi, NARUSHIMA Takayuki, KANEKO Toshiro, KAWASHITA Masakazu, KUDO Tada-aki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    The aim of this study was to construct dental implant recovery system in the oral cavity due to a completely new approach based on three pillars; ① powerful sterilization and infected tissue removal, ② re-activation treatment of the implant surface, ③ tissue regeneration, as a method of obtaining a functional and morphological recovery in the oral cavity without removing the dental implant with peri-implant inflammation. As research results, by application of the latest technology of low-temperature plasma jet, the base of the dental implant recovery system to promote good tissue regeneration was constructed by carrying out the safe sterilization and surface re-activation treatment in the oral cavity for the implant which has lost its biological activity.

  13. Biofunctionalization of metallic biomaterials by forming ceramic interface layers

    NARUSHIMA Takayuki, KASUGA Toshihiro, OGASAWARA Kouetsu, UEDA Kyosuke

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    Ceramic coating layers of amorphous calcium phosphate (ACP) and TiO2 were prepared on Ti, and their antibacterial activities were evaluated. Ag-containing ACP layers fabricated by RF magnetron sputtering exhibited antibacterial activity through the continuous release of Ag ions, caused by the resorbability of ACP. TiO2 layers fabricated by thermal oxidation processes showed photodegradation of organic compounds and antibacterial activity under both UV- and visible-light irradiation. The introduction of Au into TiO2 layers from Ti-Au alloy substrates contributed to the expression of visible-light response. The optimized fabrication processes provided the coating films with both the bone forming ability and antibacterial activity.

  14. Formation of porous surface on NiTi and suppression of Ni ion release

    UEDA Kyosuke, NARUSHIMA Takayuki, KATO Hidemi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2012/04/01 - 2014/03/31

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    A dealloying Ni surface having a porous structure was prepared from NiTi alloys through immersion in molten metals. The concentration of Ni from the NiTi substrate to the surface was decreased in a stepwise manner forming an inner Ti2Ni layer and outer alpha-Ti layer on the substrate. The amounts of metallic ions eluted from these specimens to 1mass% lactic acid solution were evaluated. Despite the increased surface area of the dealloyed specimen, Ni ion elution was suppressed to the same level as that in the non-treated NiTi substrate. The anatase layer formed by two-step thermal oxidation suppressed the Ni ion release from the dealloyed substrate.

  15. Osteogenesis by gradually expanding the interface between bone surface and periosteum

    KAWAMURA HIROSHI, NARUSHIMA Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2011/04/01 - 2014/03/31

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    We are investigating to regenerate bone by osteogenesis using gradually expanding the interface between bone surface and periosteum. In this study we developed the new dental implant system to obtain quick and broad adherence to surrounding bone to use for the regenerated bone. We evaluated thin amorphous calcium phosphate films coated on the surface of titanium dental implants using magnetron sputtering. The coated thin amorphous phosphate films induced early not only distance osteogenesis from the bone surrounding implants but also inner osteogenesis in the surface layers of the films. The implants showed early good mechanical fixation.These results suggested that implants coated with thin amorphous phosphate layers improve implant fixation and accelerate bone response.

  16. Development of bone-compatible interface using bioresorbable calcium phosphate coating film

    NARUSHIMA Takayuki, UEDA Kyosuke, KAWAMURA Hiroshi, KASUGA Toshihiro, TAIRA Masayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2010 - 2012

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    In vivo and in vitro evaluations of an amorphous calcium phosphate film formed on commercially pure titanium were conducted. Titanium implants coated with amorphous calcium phosphate were given to the femur and tibia of white rabbits. The implant stability quotient (ISQ) and bone implant contact for titanium implants were statistically improved by the coating of amorphous calcium phosphate. The coating film was absorbed during an implantation period of two-weeks; the release of Ca and P-related ions due to this absorption was suggested to play an important role in the improvement of bone compatibility. Further, the addition of Nb to the amorphous calcium phosphate film was an effective technique to control its resorbability in biological environments.

  17. Surface modification of titanium by pack cementation process for improvement of bone compatibility

    UEDA Kyosuke, NARUSHIMA Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2009 - 2010

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    Calcium phosphate reaction layers were fabricated on titanium by pack cementation process, isobaric-isothermal process and their combination process to improve the bonecompatibility of titanium. The phase of the reaction layer was hydroxyapatite (HAp) and Ca-P-O-Ti graded layer, and its thickness was several μm. The reaction layer showed high bonding strength to the substrate and high ALP activity by the cell culture test. These results suggested that the new process effectively improved the bone compatibility of titanium.

  18. Ceramic surface modification of titanium for controlling bone-forming ability

    NARUSHIMA Takayuki, UEDA Kyosuke

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2007 - 2009

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    The formation and evaluation of bio-ceramic layer for improving bone-forming ability of titanium have been investigated, and the following results were obtained. (1) The bioresorbable amorphous calcium phosphate coating fabricated using RF magnetron sputtering improved the bone-compatibility of titanium implants. (2) The anatase-rich film with high bone-forming ability was fabricated on titanium by the newly developed two-step thermal oxidation process with low-cost and simplicity.

  19. 生体吸収性材料とチタン合金を用いた自家骨再生・修復デバイス開発-治験申請を目指す

    成島 尚之, 勝部 朝之, 川村 仁, 後藤 孝, 井口 泰孝, 大内 千秋

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2005 - 2006

    More details Close

    本年は、生体吸収性を有するリン酸カルシウムコーティング膜として、擬似体液中における迅速なアパタイト形成及びカルシウムイオン溶出が確認された非晶質リン酸カルシウム(ACP)に着目し、その生体内外評価を行うと共に、β型チタン合金の人工歯根としての可能性を検討した。 (1)ACP膜の生体外評価: ACPコーティング膜のチタン基板との密着力をアルミニウムスタッド引き抜き法により評価した。コーティングままでは、60MPa以上の密蒲力が得られたが、擬似体液中へ浸漬後の密着力は30MPaへと低下した。これに対し、ブラスト処理を施したチタン基板においては、擬似体液浸漬後においてもコーティングままと同等以上の密着力が得られた。インプラント用コーティング膜の密着力としては50MPa以上が必要とされているが、それを満足するものと評価できる。 (2)ACP膜の生体内評価: 前年にビーグル犬下顎骨に埋入したACPコーティングを施したチタンシリンダーと骨界面の骨接触率を評価した。その結果、8-12週埋入後において、ACPコーティング膜の存在が骨接触率を有意(P<0.05)に上昇させることを見出した。また、インプラント-骨界面における新生骨量に関しても、ACPコーティング材において有意(P<0.05)に大きいことがわかった。 (3)コーティング膜総合的評価: 生体内外評価によりRFマグネトロンスパッタリング法により作製した生体吸収性ACPコーティング膜はチタンの骨適合性を向上させることが明らかとなった。 (4)β型チタン合金の人工茜根への応用: Ti-6at%Mo-4at%Snを素材とした人工歯根のビーグル犬下顎骨への埋入実験を行い、骨接触率に関してCPチタン材と大きな差異のないことを確認した。

  20. Surface hardening process accompanying with grain refinement in titanium materials using methane gas

    NARUSHIMA Takayuki, MURAKAMI Taichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    2005 - 2006

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    (1) Methane gas treatment Maximum surface hardness and hardening layer depth were 850Hv and 230gm, respectively, for Ti-6A1-4V alloy after the treatment in Ar-5%CH_4 mixture gas at 1198 K for 10.8 ks. As for Ti-4.5A1-3V-2Fe-2Mo (SP-700) alloy, the maximum surface hardness of 880 Hv and the hardening layer depth of 130gm were obtained after the treatment in Ar-5%CH_4 mixture gas at 1073 K for 21.6 ks. It was suggested that the use of methane gas is effective for hardening in titanium materials. However, the amounts of dissolved hydrogen into the titanium alloys were not sufficient for grain refinement. (2) Treatment in methane-hydrogen mixture gas Both alloys were treated in the atmosphere of CH_4:H_2=1:1 at 1023 K for 1.8 ks, followed by aging and dehydration treatments. However, no grain refinement was obtained for both the alloy after these treatments, though the hydrogen content of 1 mass% was achieved. (3) Treatment in hydrogen gas In order to understand the interaction between titanium and hydrogen, the microstructure change of the titanium alloys was investigated under the conditions of hydrogen dissolution at 1023 K for 1.8 ks, aging at 523-873 for 28.8 ks and dehydration at 973-1173 for 3.6 ks. The grain refinement was achieved in Ti-6A1-4V alloy with aging at 773 K and dehydration at 973 to 1173 K. On the other hand, acicular alpha phase was observed instead of fine alpha grain for SP-700 alloy. The beta transus of SP-700 is 100 K lower than that of Ti-6A1-4V. Therefore, the strain introduced during hydrogen dissolution and aging processes in SP-700 alloy was not enough for recrystallization or recovery. The further study upon the hydrogen dissolution conditions is required.

  21. Development of titanium wire ropes for implantable stimulation electrode and their evaluation.

    NARUSHIMA Takayuki, OUCHI Chiaki, IGUCHI Yasutaka, TAIRA Masayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    2004 - 2005

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    Wear property and related issues such as wear debris formation, ion elution, surface hardening using gas, reaction between cell and titanium powder were investigated using biomaterials for medical applications. (1) Wear properties of implant materials in simulated body fluids 1. Ion elution into 1 mass% lactic acid solution during pin-on-disk wear test of titanium materials was more significant than that into Hanks' solution. 2. Wear loss calculated from mass loss was almost constant with sliding distance or contact pressure for biomaterials examined, while elution rate of metal ions increased with increasing sliding distance. 3. When CP titanium pin and disk were used for wear test, the wear loss was higher than that of α+β titanium alloys. It was suggested that adhesive wear occurred at the interface between CP Ti pin and disk. 4. When PSZ or Si_3N_4 pin and CP Ti disk were used, wear loss was lower than that using other ceramic pin, and elution rate was higher. (2) Effect of the surface hardening on wear property of titanium 1. Mass loss during pin-on-disk wear test for CP titanium or β-type Ti-14Mo-3Nb-1.5Zr alloy was decreased by surface hardening using CO gas. 2. The surface hardening using CO gas for CP titanium was more effective than that for β-type Ti-14Mo-3Nb-1.5Zr alloy, because solubility of oxygen or carbon in CP titanium with α type structure was much higher than in β-type titanium alloys. (3) In vivo and in vitro evaluation of wear debris 1. Titanium powder caused the ion elution in simulated body fluids, but the ion elution is relatively low in total ion elution during wear test. 2. RAW 264 cell viability was decreased by titanium ion, and the titanium ion affected the SOD activity and TNF-α formation. 3. It was observed that RAw264 cells phagocytosed titanium powder with 10 μm in diameter, which suggested the active interaction between the cell and titanium powder.

  22. Development of titanium wire ropes for implantable stimulation electrode and their evaluation

    IGUCHI Yasutaka, OUCHI Chiaki, NARUSHIMA Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    2004 - 2005

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    1. Development of titanium wore for implantable stimulation electrodes (1) α+β type Ti-4.5Al-6Nb-2Fe-2M titanium alloy was drawn to the wire with 100 μm in diameter. Anodic oxidation was effective to the oxide formation on the surface for wire drawing. In the atmospheric oxidation for oxide formation process, it was suggested that the low temperature process was preferred. (2) β type Ti-14Mo-3Nb-1.5Zr titanium alloy was drawn to the wire with 42 μm in diameter. The low temperature atmospheric oxidation was used for oxide formation process on the surface. In addition to that, the β type alloy was drawn to 100 μm in diameter using anodic oxidation, which showed the smooth surface after drawing. (3) CP titanium (4N) was drawn to the wire with 47 μm in diameter. The surface morphology of this wire was better than that of commercially available CP titanium wire with 46 μm in diameter. (4) α type Ti-10Zr titanium alloy was drawn to the wire with 51 μm in diameter, which exhibited the excellent surface smoothness and mechanical properties. The wire ropes with 7 and 7x7 strands made of Ti-10Zr titanium alloy were successfully developed. 2. Evaluation (1) The maximum tensile strength and total elongation of CP titanium wire with 47 μm in diameter were 980 MPa and 3.5 %. The mechanical properties of the β type Ti-14Mo-3Nb-1.5Zr titanium alloy wire and the α type Ti-10Zr titanium alloy wire were measured. (2) The fatigue limits of the developed CP titanium wire with 47 μm in diameter and commercially available CP titanium wire with 46 μm in diameter were 200 MPa and 300 MPa, respectively. The difference of fatigue limit may be caused by the surface roughness after fatigue testing. The commercially available CP titanium wire exhibited the smoother surface than developed CP titanium wire after 10^7 cycles.

  23. 低温プラズマ・水素還元法による高純度チタン粉末製造プロセスの研究

    井口 泰孝, 成島 尚之, 大内 千秋

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2003 - 2003

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    これまでSiF_4を原料とした太陽電池用シリコン粉末製造に使用されていた同軸マグネトロン型プラズマ処理法を応用して、クロール法と同じ原料の液体TiCl_4からのチタン製造プロセスの検討を行い、以下の結果を得た。 1.原料としてはTiCl_4の液体を用いるので、同軸マグネトロン型プラズマ処理装置のガス導入系を改良して液体原料を保持する容器を据え付けると共に、その蒸気をチャンバー内に搬送することができるようにした。 2.TiCl_4気化温度100〜150℃、水素流量80sccm、チャンバー圧力4Torr、RF入射電力1.5〜2kW、反射電力0.1KWとした合成条件下における2時間の反応により約20〜30%の収率で、主にTiCl_3粉末が得られた。TiCl_3は大気中の水蒸気の反応によりTicl_3・6H_2Oとして存在していた。また、一部TiO_xの存在もX線回折により確認された。 3.TiO_xの存在は、チタン金属粉末が大気中の酸素または水蒸気と反応して形成されたものと予想される。従って、原理的には、低温プラズマを利用した本方法によりTiCl_4(1)から金属チタンの製造は可能と思われる。Ticl_4の還元を十分進行させ、金属チタンの収率を向上させるためには、(i)水素ガスの供給量(分圧)を向上させる、(ii)チャンバー中の反応領域の体積を増加させるなどの対応が有効と考えられる。

  24. Anisotropy of silicon carbide crystal : Approaches in terms of surface process and high-temperature oxidation

    NARUSHIMA Takayuki, IGUCHI Yasutaka, OUCHI Chiaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2002 - 2003

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    The anisotropy of physical and chemical properties of silicon carbide (SiC) crystal was investigated with the approaches in terms of surface process and high-temperature oxidation. 1.Oxidation of SiC Oxidation kinetics of CVD-SiC and single crystalline SiC in ozone-containing atmospheres at temperatures from 573 to 1273K up to 345.6ks were evaluated by the measurement of oxide thickness on the specimen. The oxidation rate of (0001^^_) C face in the ozone-containing atmospheres was much higher than that of (0001) Si face as well as in oxygen atmosphere previously reported. The measurement of the oxidation rates of single crystalline SiC revealed that the order of the oxidation rates was (0001^^_)> (12^^_10) >(101^^_0)> (0001). This order well corresponds to the density of carbon on the individual face. The oxidation rate on (0001) Si face in the ozone-containing atmospheres relatively increased compared with that in other oxidation atmospheres such as dry oxygen or wet oxygen. This result suggests that the use of ozone gas as oxidant in semiconductor device fabrication process might be effective for rapid oxidation at low temperatures. 2.Surface process in SiC Negative crystal was introduced into the SiC single crystal. The shape change of the negative crystal was measured at 2473 K. The faceting of the negative crystal suggested that {0001} was stable face, a part of the Wulff shape, while {121^^_0} was unstable face, not a part of Wulff shape. The rate of shape change of the negative crystals obtained in the experiments was compared with that calculated using the model, in which the driving force of shape change assumed to be the difference of chemical potential on the surface. The rate controlling process of shape change was the surface attachment limited kinetics (SALK) for on-axis face, while the. contribution of surface diffusion on the rate controlling process was suggested for off-axis face.

  25. Development of the adsorbent for heat storage system using iron and steel making slag as source material

    OUCHI Chiaki, SAHARA Ryoji, NARUSHIMA Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: TOHOKU UNIVERSITY

    2002 - 2003

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    The heat storage system using water vapor adsorption to zeolite materials is getting much attention because of extremely high energy density and flexibility of process. The composition of zeolite A can be shown as M_XAl_XSi_<1-X>・nH_O. The hydrophiic property of zeolite A is excellent because of high Al/Si ration in the zeolite A. The blast furnace slag mainly consists of SiO_2, Al_2O_3, CaO and MgO. Since Ca and Mg can be introduced to zeolite A as M, the blast furnace slag is a promising candidate for source materials of zeolite A. In the present work, the alkali hydrothermal process for production of zeolite A from the blast furnace slag as a source material was investigated. The following results were obtained; 1.Zeolite A can be synthesized from SiO_2-Al_2O_3-CaO slag by hydrothermal treatment in the conditions; Temperature: 328-393 NaOH: 0.5-3 M NaOH solution : slag (source material): 15 (mug) 2.The zeolite A synthesized by the hydrothermal process was thermally stable up to 873 K. 3.In order to obtain zeolite A from blast furnace slag in the hydrothermal process, the adjustment of composition was needed. It was required to decrease the content of CaO+MgO in the blast furnace slag. The less the content of CaO+MgO, The more the ratio of zeolite A to total products after hydrothermal synthesis. 4.The rate of the hydrothermal reaction increased by using the ball-mill-type chamber. 5.It was confirmed that the zeolite A obtained in the present work was applicable to the heat storage system because endothermic reaction was observed during the heating of the zeolite A.

  26. Abrasion and ion elution of implantable metallic electrode in bending-rotating fatigue testing

    IGUCHI Yasutaka, NARUSHIMA Takayuki, OUCHI Chiaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    2002 - 2003

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    The fatigue properties of stainless steel wire ropes and titanium wires in simulated body fluids at 310 K were investigated in rotating-bending testing as a fundamental study for applications to the FES (Functional Electrical Stimulation) electrode. 1.Stainless steel wire rope (1)The new stainless steel (Fe-22Cr-10Ni-6Mn-2Mo-0.4N) wire rope exhibited the higher fatigue strength and wear corrosion resistance than the type SUS3 16L stainless steel wire rope under low maximum bending stress level. (2)The metal ion concentrations in the lactic acid solution increased with increasing of number of cycles in fatigue testing, which agreed with the chemical composition of the stainless steels. On the other hand, in Hanks' solution, they are suppressed at the low level, and the order of the amounts of ion elution was Ni>Cr>Fe. (3)The ferric oxyhydroxides (β-FeOOH) was formed in Hanks' solution as corrosion products during fatigue testing, which might keep iron and chromium ions at low concentration in Hanks' solution. 2.Titanium wires (1)The wire made of the new β-type titanium alloy, Ti-14Mo-3Nb-1.5Zr, had excellent fatigue strength compared with the C.P.Ti wire. (2)The ratio of fatigue limit (σ_f) to tensile strength (σ_U) of the C.P.Ti wire was less than 30 percent, which might be caused by the surface flaws introduced during the cold working process. (3)The C.P.Ti wire with diamond like carbon (DLC) coating exhibited the relatively high value of σ_f/ σ_U. This result suggests that the fatigue life of the titanium wire can be improved by the optimization of the DLC coating process.

  27. Oxidation mechanism of silicon and silicon-based ceramics in ozone-containing atmosphere.

    NARUSHIMA Takayuki, IGUCHI Yasutaka

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: TOHOKU UNIVERSITY

    1999 - 2000

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    Introduction The oxidation kinetics of silicon and silicon carbide were investigated in an oxygen-ozone atmosphere at 973 K, and the possible oxidation mechanism of silicon-based materials is discussed. Experimental The samples used for oxidation tests were single crystalline silicon, polycrystalline silicon carbide (CVD), and single crystalline α(6H)-silicon carbide. An oxygen-ozone mixture gas (ozone gas partial pressure : 2-7 kPa, total pressure : 0.1 MPa) was generated with a silent discharge ozonizer system using dry oxygen as a source gas. Oxidation temperature was 973 K.Thickness of the oxide film formed on a sample was measured by ellipsometry at a fixed refractive index (1.462). The oxide films were examined by secondary ion mass spectroscopy (SIMS). Results and discussion (1) Oxidation kinetics Parabolic behavior was observed at 973 K in oxygen-ozone mixture gas for the oxidation of silicon carbide C-face, Si-face and silicon. The oxidation rates of silicon and silicon carbide were much higher than those in pure oxygen. Atomic oxygen supplied by the dissociation of ozone gas seems to cause the increasing of oxidation rates, and the atomic oxygen diffusion through silica film is a rate-controlling process for oxidation because parabolic rate constant increased linearly with ozone gas partial pressure. (2) High oxidation rate of SiC C-face The oxidation rates of silicon carbide C-face in ozone-containing atmospheres are higher than those of Si-face and silicon. The higher oxidation rates of C-face than those of silicon may be caused by carbon in silica film formed on C-face detected with SIMS.

  28. Development and Evaluation of Alloys for the Electrodes for Functional Electrical Stimulation to Appropriate for the Long Term Implantation

    IGUCHI Yasutaka, IIKUBO Tomohito, HANDA Yasunobu, HOSHIMIYA Nozomu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tohoku University

    1998 - 2000

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    Alloys for the electrodes for FES(Functional Electrical Stimulation)were developped and evaluated to appropriate for thelLong term implantation. And following results were obtained. 1. Development of New Alloy : A database for alloy designing was created. And ingots of some high-manganese high-nitrogen austenitic stainless steels were producted experimentaly. Relation between reduction and elongation or reduction of area of these alloys were tested. And, it was confirmed that the alloy named NAS106N(6mass%Mn, 10mass%Ni, 22mass%Cr, 2mass%Mo, 0.4mass%N)shows the most superior properties. And thin wire rope for FES electrodes were made by this alloy. 2. Evaluation of FES Electrodes made by New Alloy : Magunetization curves of FES wires made by newly developed alloy NAS106N, stainless steell SUS316L and cobalt-chromium based alloy NAS604PH were measured. NAS106N and NAS604PH shows the superior non-magnetic properties than SUS316L, Fatigue life of electrodes made by NAS106N, NAS605PH, SUS316L in air and 0.9%NaCl saline solution were also measured by dual-driven rotating-bending test. NAS106N has higher fatigue life than SUS316L and NAS604PH at all experimental condition in air and high at stress conditions in saline solution. On the other hand, fatigue lives of SUS316L and NAS106 were lower than NAS604PH at low stress condition in saline solution. Accordingly, NAS106N will be promising material for FES electrodes but to prevent the fretting corrosion should be the problem to be solved.

  29. オゾンガスによるシリコンおよびシリコン基セラミックスの酸化機構解明

    成島 尚之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 東北大学

    1998 - 1998

  30. In-situ Observation of Oxide Films Formed During Thermal Oxidation of Liquid Al Alloy Using Raman Spectroscopy

    NARUSHIMA Takayuki, IGUCHI Yasutaka

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: TOHOKU YNIVERSITY

    1996 - 1997

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    The formation of oxide films on liquid Al and al alloys was observed during oxidation process at 1273 K in an oxygen atmosphere by Raman spectroscopy, and the mass change due to the oxidation was measured. The following results were obtained ; 1.The oxidation process of liquid Al alloys was consisted of three stages, initial, incubation and accelerating. However, the accelerating stage was not observed for pure Al, Al-4mass% Mg, Al-4mass%Mg-1mass%Si and Al-4mass%Mg-4mass%Si. 2.MgO and spinel (MgO・Al_20_3) were formed in the initial stage of oxidation by the reaction between Mg vapor and oxygen gas. The oxidation reaction is sustained in the incubation stage by the wicking of a liquid metal through the spinel layr formed in the initial stage. Completing of the wicking may lead the accelerating stage, in which alpha-Al_20_3 was mainly formed and remarkable mass gains were observed. 3.In situ Raman spectra of oxide filmed were obtained during oxidation process of Al-1mass%Mg (with accelerating stage) and Al-4mass%Mg (without accelerating stage). The Raman peaks of spinel (MgO・Al_20_3) and alpha-Al_20_3 appeared for Al-1mass%Mg during holding at 1273 K.Both of the Raman peaks periodically disappear during the holding, which was caused by the presence of the liquid metal on the surface of the oxide film. The liquid metal flowed over the surface through cracks of the oxide films. The formation of cracks was confirmed by in situ observation of oxidation process using optical microscopy. On the other hand, the formation of spinel was observed for Al-4mass%Mg during holding at 1273 K,and the other Raman peaks were not detected for 5 hours, which means that the wicking of liauid metal through the spinel phase has not completed yat.

  31. Development of Implantable Electrode for Functional Electrical Stimulation.

    IGUCHI Yasutaka, NARUSHIMA Takayuki, HANDA Yasunobu, HOSHIMIYA Nozomu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: TOHOKU UNIVERSITY

    1994 - 1996

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    The functional electrical stimulation (FES) system is very effective in order to restore motor functions of the paralyzed extremities in spinal cord injury and carebral disease patients. The applicants have been developed as stimulator with percutaneous intramuscular electrodes and have been utilizing clinically the system. However, this system has unavoidable problems such as infection and breakage at the position where electrodes go through skin, careful daily maintenance, and cosmetically unfavorable upon patients. Therefore, development of a totally implanted FES system is necessary. In this study more reliable electrodes have been developed than the present percutaneous electrodes. The obtained results are as follows : 1. Chromium-cobalt alloy was refined by electro-slag remelting and 25 mum diameter wire was drawn as well as SUS316L stainless steel. The mechanical properties were well satisfied. 2. Pitting corrosion was observed on the SUS316L wire in saline solution with accelerated corrosion test by applying electric current, on the contrary, no pitting corrosion on the 604PH wire. 3. In order to easily and stably connect electrodes with the stimulator during operation, design of connectors and electrode tip were developed. 4. Prototype systems of totally implanted FES with the electrodes of two kinds of materials (SUS316L and 604PH) were implanted in sheep and operating check of the system has been carried out. Useful information has been expected for development of the final system.

  32. Hydrogen Analysis by Using of Secondary Ion Mass Spectroscopy

    NARUSHIMA Takayuki, IGUCHI Yasutaka

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for General Scientific Research (C)

    Institution: TOHOKU UNIVERSITY

    1994 - 1995

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    (1) Hydrogen analysis Hydrogen analysis by using of secondary ion mass spectroscopy (SIMS) was carried out for the standard sample (SiO_2 on silicon) in which proton was implanted, and the optimum analytical conditions for hydrogen analysis were clarified. It is important for hydrogen analysis to control the raster size of an ion beam, neutralization, signal gating and so on. (2) Wet oxidation rate Wet oxidation rates of chemically-vapor-deposited silicon carbide (CVD-SiC) and silicon nitride (CVD-Si_3N_4) were measured by a thermogravimetric technique. The oxidation films were analyzed by XRD and Raman spectroscopy. The oxidation rate was increased with increasing of water vapor pressure and decreasing of oxygen pressure in the atmosphere. This may be lead by the change of micro-defects in the oxide film (silica). Water vapor in the atmosphere accelerated the crystallization of oxide film at lower-temperatures (around 1373 K) and non-crystallization at higher-temperatures (>1873 K). It was clarified by laser Raman spectroscopy that amorphous silica was at around oxide/gas interface and cristobalite was at around oxide/ceramics interface, i.e., the oxide film formed was a duplex one. These results suggested that the formation of amorphous silica lowered the oxidation resistance of siliconbased ceramics for wet oxidation.

  33. Development of"in situ"measuring system for an oxidization process of metals by using Raman spectroscopy

    ARASHI Haruo, SHIMIZU Ryousuke, NARUSHIMA Takayuki, IGUCHI Yasutaka

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Developmental Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    1993 - 1994

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    Laser Raman spectroscopy is one of the most suitable methods for"in situ"observation of the oxidization process of metals from the following points of view ; specimens are not destroyed and a small area can be analyzed by micro-Raman spectroscopy. We developed the "in situ"measuring system, which has a triple monochromator, a CCD detector, and a heating stage which can change the environmental conditions, for an oxidization process of metals by using Raman spectroscopy. This system clarified that the growth process of oxide films during thermal oxidization of Fe-6.5mass%Si alloy at 1073K in O_2 and CO_2 atmospheres depends on the concentration of the oxygen defects in the SiO_2 surface layr. This system also performed to observe the oxidization of the liquid Al and Al-Mg alloys at 1273K. This system developed in this study is the suitable method for"in situ"observation of oxidization especially at high temperatures.

  34. Distribution of impurity elements between flux and melt during the growth of III-V compound semiconductor single crystals.

    YASUTAKA Iguchi, WATANABE Masatoshi, NARUSHIMA Takayuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for General Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    1993 - 1994

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    1. Phase diagrams of III group oxide-B_2O_3 binary systems. No phase diagrams has been reported in Ga_2O_3-B_2O_3 and In_2O_3-B_2O_3 systems, and one phase diagram in Al_2O_3-B_2O_3 system. In the present work, solubility of III group oxide (Ga_2O_3, In_2O_3, Al_2O_3) in B_2O_3 melt and the solid phase equilibrated with the melt were determined. The phase diagrams of Ga_2O_3-B_2O_3, In_2 O_3-B_2O_3, and Al_2O_3-B_2O_3 binary systems were constructed with high accuracy using these data. 2. Oxygen solubility in liquid gallium and liquid indium. The oxygen solubility in liquid gallium or liquid indium equilibrated with solid Ga_2O_3 or In_2O_3, respectively was determined as follows : log (O/mass% in liquid gallium) =-6200/T+2.61 (T : 1123-1523 K) log (O/mass% in liquid indium) =-6600/T+3.77 (T : 1073-1373 K) Using the temperature dependence of the oxygen solubility, the standard free energy change for oxygen dissolution in liquid gallium or liquid indium could be represented as follows : 1/20O_2 (g) =O (mass% in liquid gallium) , DELTAGﾟ=-2.45x10^5+59.6T (J) 1/20O_2 (g) =O (mass% in liquid indium) , DELTAGﾟ=-1.79x10^5+33.8T (J) 3. Oxygen distribution between flux and melt Oxygen distribution between III group metal oxide (Ga_2O_3 or In_2O_3) -B_2O_3 binary flux and liquid III group metal (Ga or In) was investigated in the view point of fundamental study for LEC method. Distribution ratio of oxygen for the Ga system at 1423 K and the In system at 1373 to 1473 K were determined. The activity of Ga_2O_3 and In_2O_3 in B_2O_3 flux were found to be small, which suggested that oxygen content in III-V compound melts might be suppressed to be lower level in the LEC process.

  35. ラマン分光法によるシリカ酸化皮膜の結晶化のその場観察とその酸化速度に及ぼす影響

    成島 尚之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1991 - 1991

  36. シリコン基セラミックスの超高温低酸素分圧下における酸化機構

    成島 尚之

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東北大学

    1989 - 1989

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