Details of the Researcher

PHOTO

Hidemi Kato
Section
Institute for Materials Research
Job title
Professor
Degree
  • 博士(工学)(東北大学)

  • 修士(工学)(東北大学)

Research History 2

  • 2017/04 - 2020/03
    Changchun University of Technologies 客員教授

  • 2005/03 - 2006/02
    マサチューセッツ工科大学 客員研究員

Education 1

  • Tohoku University Graduate School, Division of Engineering 材料加工学

    - 1999/03

Committee Memberships 2

  • (公社)日本金属学会 東北支部長

    2025/04 - Present

  • 日本金属学会 東北支部評議員

    2016/04 - 2018/03

Professional Memberships 4

  • The Society of Materials Science, Japan

  • 粉体粉末冶金協会

  • 米国材料学会(MRS)

  • 日本金属学会

Research Interests 4

  • dealloying

  • porous metal

  • relaxation

  • metallic glass

Research Areas 1

  • Nanotechnology/Materials / Metallic materials /

Awards 7

  1. 第68回 日本金属学会論文賞 物性部門

    2020/09 公益社団法人日本金属学会 Solid Solutions with bcc, hcp, and fcc Structures Formed in a Composition Line in Multicomponent Ir-Rh-Ru-W-Mo System

  2. 第68回 日本金属学会論文賞 材料プロセシング部門

    2020/09 公益社団法人日本金属学会 High-Entropy Alloys with Hexagonal Close-Packed Structure in Ir26Mo20Rh22.5Ru20W11.5 and Ir25.5Mo20Rh20Ru25W9.5 Alloys Designed by Sandwich Strategy for the Valence Electron Concentration of Constituent Elements in the Periodic Chart

  3. 平成30年度協会賞 研究進歩賞

    2019/06 ⼀般社団法⼈粉体粉末冶⾦協会 金属溶湯脱成分法を用いたポーラス金属粉末の開発

  4. 第74回日本金属学会功績賞

    2016/03/23 日本金属学会 物性部門

  5. (財)青葉工学振興会研究奨励賞

    2004/12/08 (財)青葉工学振興会

  6. Best Poster Award

    2002/11/04 MRS Nanoporous Behavior Induced by Excess Vacancy Clustering in Rapidly-solidified B2 FeAl Ribbons

  7. 第12回日本金属学会奨励賞

    2002/11/02 日本金属学会 力学特性部門

Show all ︎Show 5

Papers 394

  1. Silicon effects on the formation of heterogeneous intermetallic compound phases in Cu-Ni-Si(-Mn) alloys under homogenization treatment

    Hyun Woo Jeong, Ji Yong Shin, Se Hun Kwon, Hidemi Kato, Eun-Ae Choi, Seung Zeon Han

    Intermetallics 2025/10

    DOI: 10.1016/j.intermet.2025.108913  

  2. Development of 3D interconnected heterogeneous high-entropy alloy composites with enhanced multifunctionality via liquid metal dealloying

    Munsu Choi, Gang Hee Gu, Jongun Moon, Jae Wung Bae, Hidemi Kato, Seung Zeon Han, Hyoung Seop Kim, Yongseok Choi, Soo-Hyun Joo

    Journal of Materials Research and Technology 2025/07

    DOI: 10.1016/j.jmrt.2025.07.158  

  3. Exploring the impact of hard-to-soft domain ratios in a heterostructured multi-principal element alloy Peer-reviewed

    Peyman Asghari-Rad, Yongju Kim, Gang Hee Gu, Hidemi Kato, Hyoung Seop Kim

    Materials Science and Engineering: A 2025/04

    DOI: 10.1016/j.msea.2025.148024  

  4. Development of 3D interconnected nanoporous TiZrHfNbTaNi high-entropy alloy via liquid metal dealloying and subsequent synthesis of (TiZrHfNbTaNi)O high-entropy oxide Peer-reviewed

    Jae Hyuk Lee, Soo Vin Ha, Jihye Seong, Akira Takeuchi, Ruirui Song, Hidemi Kato, Soo-Hyun Joo

    Journal of Materials Research and Technology 35 5204-5215 2025/03

    Publisher: Elsevier BV

    DOI: 10.1016/j.jmrt.2025.02.152  

    ISSN: 2238-7854

  5. Strain-induced and thermally-reversible BCC to FCC phase transformation in a heavily deformed Fe–Mn–Co–Ni–Cu–Al–C alloy Peer-reviewed

    D.V. Louzguine-Luzgin, Y. Hamasaki, M. Mori, K. Yamanaka, R. Umetsu, H. Kato, Y. Miyajima

    Materials Science and Engineering: A 147991-147991 2025/02

    Publisher: Elsevier BV

    DOI: 10.1016/j.msea.2025.147991  

    ISSN: 0921-5093

  6. The effect of some late 3d transition metals additions to a Fe–Mn–Al–C alloy on the development of high-entropy alloys Peer-reviewed

    V. O. Semin, R. Yamada, Y. Hamasaki, Y. Miyajima, K. Ishikawa, A. Watanabe, H. Kwon, H. S. Kim, H. Kato, D. V. Louzguine-Luzgin

    Intermetallics 177 2025/02

    DOI: 10.1016/j.intermet.2024.108589  

    ISSN: 0966-9795

  7. Mechanical properties of Ti/Mg bicontinuous composite by liquid metal replacement Peer-reviewed

    Yusuke Ohashi, Hidemi Kato

    Scripta Materialia 256 2025/02/01

    DOI: 10.1016/j.scriptamat.2024.116413  

    ISSN: 1359-6462

  8. Structural and dynamical changes in a Gd-Co metallic glass by cryogenic rejuvenation Peer-reviewed

    Shinya Hosokawa, Jens R. Stellhorn, László Pusztai, Yoshikatsu Yamazaki, Jing Jiang, Hidemi Kato, Tetsu Ichitsubo, Eisuke Magome, Nils Blanc, Nathalie Boudet, Koji Ohara, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q.R. Baron

    Acta Materialia 284 2025/01/01

    DOI: 10.1016/j.actamat.2024.120616  

    ISSN: 1359-6454

  9. Anelastic relaxation considering physical aging effects in a high-entropy metallic glass Peer-reviewed

    Ya Juan Duan, Zong Rui Xu, Lang Ting Zhang, Mehran Nabahat, Yun Jiang Wang, Yong Yang, Takeshi Wada, Hidemi Kato, Jean Marc Pellerier, Ji Chao Qiao, Eloi Pineda

    Science China Technological Sciences 67 (12) 3967-3975 2024/12

    DOI: 10.1007/s11431-024-2737-2  

    ISSN: 1674-7321

    eISSN: 1869-1900

  10. On the kinetics of structural evolution in metallic glasses Peer-reviewed

    S. Y. Liang, F. Zhu, Yun Jiang Wang, E. Pineda, T. Wada, H. Kato, J. C. Qiao

    International Journal of Engineering Science 205 2024/12/01

    DOI: 10.1016/j.ijengsci.2024.104146  

    ISSN: 0020-7225

  11. Mechanical memory and relaxation decoupling of metallic glasses in homogenous flow Peer-reviewed

    L. T. Zhang, Y. J. Wang, Y. Yang, T. Wada, H. Kato, J. C. Qiao

    International Journal of Mechanical Sciences 281 2024/11/01

    DOI: 10.1016/j.ijmecsci.2024.109661  

    ISSN: 0020-7403

  12. Oxidation and Mechanical Properties of Ultrafine-Grained MoSiBTiC Alloy Produced by Rapid Solidification Peer-reviewed

    Kyosuke Yoshimi, Naoma Abe, Xi Nan, Shuntaro Ida, Takeshi Wada, Hidemi Kato

    Advances in Materials Technology for Power Plants 84871 1279-1288 2024/10/15

    Publisher: ASM International

    DOI: 10.31399/asm.cp.am-epri-2024p1279  

    ISSN: 2994-4023

    eISSN: 2994-4031

    More details Close

    Abstract The microstructural evolution of the MoSiBTiC alloy by rapid solidification and its effect on oxidation and mechanical properties were investigated in this study. A Mo-5Si-10B-10Ti-10C (at%) alloy was produced by a conventional arc-melting technique in an Ar atmosphere, and then it was rapidly solidified by tilt-casting into a rod-shaped copper hearth. Vickers hardness values increased drastically above 1000 Hv due to the microstructure refinement through rapid solidification. They rose from the center toward the outer surface, ranging from about 1100 to 1300 Hv. Interestingly, the oxidation resistance of the rapidly solidified MoSiBTiC alloy at 1100 °C was dramatically improved, probably due to the microstructure refinement effect with ultrafine grains. However, the fracture toughness value of the rapidly solidified MoSiBTiC alloy was about 8 MPa·m1/2, less than half of the cast and heat-treated MoSiBTiC alloy previously reported. Heat treatment and composition optimization will further improve the performance of the rapidly solidified MoSiBTiC alloy.

  13. CREEP MECHANISM OF Pd<inf>20</inf>Pt<inf>20</inf>Cu<inf>20</inf>Ni<inf>20</inf>P<inf>20</inf> HIGH ENTROPY AMORPHOUS ALLOY Peer-reviewed

    Yajuan Duan, Zongrui Xu, Qi Hao, H. Kato, Jichao Qiao

    Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics 56 (10) 2913-2923 2024/10

    DOI: 10.6052/0459-1879-24-092  

    ISSN: 0459-1879

  14. Self-Supported Metallic Glass as a Highly Durable HER Electrode under Fluctuating Renewable Power Peer-reviewed

    Liandong Li, Bing Lin, Hailong Zhang, Jichao Qiao, Takeshi Wada, Hidemi Kato, Junlei Tang

    ACS Sustainable Chemistry and Engineering 12 (39) 14425-14434 2024/09/30

    DOI: 10.1021/acssuschemeng.4c04017  

    eISSN: 2168-0485

  15. The high-temperature deformation behavior of Pd20Pt20Cu20Ni20P20 metallic glass Peer-reviewed

    J. B. Cui, G. J. Lyu, Q. Hao, F. Zhu, V. A. Khonik, Y. J. Duan, T. Wada, H. Kato, J. C. Qiao

    Mechanics of Materials 196 2024/09

    DOI: 10.1016/j.mechmat.2024.105078  

    ISSN: 0167-6636

  16. Dual-gradient structure induced spreadable phase transformation for simultaneously improving strength and ductility Peer-reviewed

    Rae Eon Kim, Gang Hee Gu, Soung Yeoul Ahn, Yoon Uk Heo, Jongun Moon, Qingfeng Wu, Hobyung Chae, Youl Baik, Wanchuck Woo, Hyeonseok Kwon, Hidemi Kato, Hyoung Seop Kim

    Acta Materialia 275 2024/08/15

    DOI: 10.1016/j.actamat.2024.120060  

    ISSN: 1359-6454

  17. Degradation mechanism of self-supported high-entropy metallic glass cathode in fluctuating renewable energy-powered acid water electrolysis Peer-reviewed

    Yangzheng Li, Liandong Li, Bing Lin, Jichao Qiao, Hailong Zhang, Taigang Zhou, Yingying Wang, Junlei Tang, Takeshi Wada, Hidemi Kato

    Corrosion Science 236 2024/08/01

    DOI: 10.1016/j.corsci.2024.112223  

    ISSN: 0010-938X

  18. Exploring equilibrium conditions in liquid metal dealloying of powders by in situ synchrotron X-ray diffraction Peer-reviewed

    Louis Lesage, Christophe Le Bourlot, Eric Maire, Takeshi Wada, Hidemi Kato, Wolfgang Ludwig, Nicolas Mary, Pierre Antoine Geslin

    Materialia 36 2024/08

    DOI: 10.1016/j.mtla.2024.102177  

    eISSN: 2589-1529

  19. Ti/Mg dissimilar joining by eutectic-melting-induced liquid metal dealloying Peer-reviewed

    Yusuke Ohashi, Kota Kurabayashi, Takeshi Wada, Hidemi Kato

    Materials & Design 2024/08

    DOI: 10.1016/j.matdes.2024.113095  

  20. Magnetic behavior of 3D interconnect nanoporous FeCo synthesized by liquid metal dealloying Peer-reviewed

    Benjamin Ducharne, Jae-Hyuk Lee, Soo-Hyun Joo, Pierre-Antoine Geslin, Eric Wasniewski, Hidemi Kato

    Materialia 2024/08

    DOI: 10.1016/j.mtla.2024.102157  

  21. Wear resistance of spark plasma sintered Fe-based BMG reinforced with Al2O3 Peer-reviewed

    L. Zarazúa-Villalobos, T. Yamaguchi, K. Ogawa, P. Piriyakulkij, H. Kato, N. Mary

    Journal of Non-Crystalline Solids 636 2024/07/15

    DOI: 10.1016/j.jnoncrysol.2024.123010  

    ISSN: 0022-3093

  22. Accelerated structural ordering during liquid metal dealloying and its effect on thermal coarsening of nanoporous refractory alloys Peer-reviewed

    Takeshi Wada, Akira Nakata, Ruirui Song, Hidemi Kato

    Scripta Materialia 2024/07

    DOI: 10.1016/j.scriptamat.2024.116120  

    ISSN: 1359-6462

  23. A diffusion model for liquid metal dealloying. Application to NiCu precursors dealloyed in liquid Ag Peer-reviewed

    Louis Lesage, Takumi Suga, Takeshi Wada, Hidemi Kato, Christophe Le Bourlot, Eric Maire, Nicolas Mary, Pierre-Antoine Geslin

    Acta Materialia 2024/06

    DOI: 10.1016/j.actamat.2024.119908  

    ISSN: 1359-6454

  24. Bicontinuous microstructure formation of immiscible phases by the liquid metal replacement method and its application to Ti/Mg dissimilar joining Peer-reviewed

    Yusuke Ohashi, Kota Kurabayashi, Rui Yamada, Takeshi Wada, Hidemi Kato

    Journal of Alloys and Compounds 983 2024/05/05

    DOI: 10.1016/j.jallcom.2024.173857  

    ISSN: 0925-8388

  25. Electric-thermal-mechanics modeling for in-process phenomena during micro resistance spot welding spark plug of Pt and Inconel600 Peer-reviewed

    Paponpat Chaimano, Ninshu Ma, Kunio Narasaki, Tetsuo Suga, Sendong Ren, Hidemi Kato

    Journal of Materials Research and Technology 30 2630-2641 2024/05/01

    DOI: 10.1016/j.jmrt.2024.03.218  

    ISSN: 2238-7854

  26. Correlating dynamic relaxation and viscoelasticity in metallic glasses Peer-reviewed

    Guang Hui Xing, Qi Hao, Fan Zhu, Yun Jiang Wang, Yong Yang, Hidemi Kato, Eloi Pineda, Si Lan, Ji Chao Qiao

    Science China: Physics, Mechanics and Astronomy 67 (5) 2024/05

    DOI: 10.1007/s11433-023-2345-3  

    ISSN: 1674-7348

    eISSN: 1869-1927

  27. Effects of Cr addition on structure, magnetic properties and corrosion resistance of a Fe85.5B13Cu1.5 nanocrystalline alloy Peer-reviewed

    Mingyue Guo, Junsheng Xue, Yanhui Li, Li Jiang, Lin Qi, Rie Y. Umetsu, Hidemi Kato, Wei Zhang

    Journal of Materials Research and Technology 30 2902-2910 2024/05/01

    DOI: 10.1016/j.jmrt.2024.04.032  

    ISSN: 2238-7854

  28. 金属溶湯脱成分法を用いたポーラス金属開発の新展開

    加藤秀実, 和田武

    金属(アグネ技術センター) 94 (4) 301-310 2024/04

  29. High entropy Fe–Mn–Ni–Co–Al–C alloys from an industrial steel

    Victor O. Semin, Jing Jiang, Erzhena N. Zanaeva, Daixiu Wei, Rui Yamada, Takeshi Wada, Hidemi Kato, Dmitri V. Louzguine-Luzgin

    Materials Science and Technology (United Kingdom) 40 (4) 275-287 2024/03

    DOI: 10.1177/02670836231214399  

    ISSN: 0267-0836

    eISSN: 1743-2847

  30. Unraveling influence of entropy on thermal stability and glass-forming ability of (Fe, Co)–(Ta)–B amorphous alloys: Insights from local atomic structure simulated by ab initio molecular dynamics Peer-reviewed

    Liliang Pan, Yanhui Li, Mao Cheng, Shuang Ma, Xinyu Duan, Takeshi Wada, Hidemi Kato, Wei Zhang

    Intermetallics 166 2024/03

    DOI: 10.1016/j.intermet.2023.108179  

    ISSN: 0966-9795

  31. Connection between Mechanical Relaxation and Equilibration Kinetics in a High-Entropy Metallic Glass Peer-reviewed

    Y. J. Duan, M. Nabahat, Yu Tong, L. Ortiz-Membrado, E. Jiménez-Piqué, Kun Zhao, Yun Jiang Wang, Y. Yang, T. Wada, H. Kato, J. M. Pelletier, J. C. Qiao, E. Pineda

    Physical Review Letters 132 (5) 2024/02/02

    DOI: 10.1103/PhysRevLett.132.056101  

    ISSN: 0031-9007

    eISSN: 1079-7114

  32. 金属溶湯脱成分による新規ナノポーラス金属作製

    和田武, 加藤秀実

    ぷらすとす(日本塑性加工学会論文誌) 7 (74) 81-86 2024/02

    DOI: 10.32277/plastos.7.74_81  

  33. Magnetic Behavior of Nanoporous FeCo, Fully and Partially Dealloyed by Liquid Metal

    Benjamin Ducharne, Soo Hyun Joo, Pierre Antoine Geslin, Eric Wasniewski, Hidemi Kato

    2024 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2024 - Proceedings 2024

    DOI: 10.1109/INTERMAGShortPapers61879.2024.10576760  

  34. Mechanically Robust Self-Organized Crack-Free Nanocellular Graphene with Outstanding Electrochemical Properties in Sodium Ion Battery Peer-reviewed

    Wong Young Park, Jiuhui Han, Jongun Moon, Soo Hyun Joo, Takeshi Wada, Yuji Ichikawa, Kazuhiro Ogawa, Hyoung Seop Kim, Mingwei Chen, Hidemi Kato

    Advanced Materials 2024

    DOI: 10.1002/adma.202311792  

    ISSN: 0935-9648

    eISSN: 1521-4095

  35. Exceptional abrasive wear resistance of immiscible Mg-Fe<inf>80</inf>Cr<inf>20</inf> composites with 3D interconnected structure developed by liquid metal dealloying Peer-reviewed

    Seung Yeon Hong, Soo Vin Ha, Chan Woo Jung, Ki Jeong Shin, Jae Hyuk Lee, Jihye Seong, Munsu Choi, Sung Hyuk Park, Takeshi Wada, Hidemi Kato, Hyoung Seop Kim, Soo Hyun Joo

    Journal of Alloys and Compounds 968 2023/12/15

    DOI: 10.1016/j.jallcom.2023.172019  

    ISSN: 0925-8388

  36. Effects and mechanisms of Nb and Fe additions on glass-forming ability and magnetic properties of a Co<inf>71.5</inf>Gd<inf>3.5</inf>B<inf>25</inf> metallic glass Peer-reviewed

    Junyu Zhang, Shuang Ma, Hao Wang, Takeshi Kubota, Yanhui Li, Hidemi Kato, Rie Y. Umetsu, Man Yao, Wei Zhang

    Journal of Alloys and Compounds 968 2023/12/15

    DOI: 10.1016/j.jallcom.2023.171875  

    ISSN: 0925-8388

  37. Partial liquid metal dealloying to synthesize nickel-containing porous and composite ferrous and high-entropy alloys Peer-reviewed

    Takeshi Wada, Pierre-Antoine Geslin, Daixu Wei, Hidemi Kato

    Communications Materials 4 (1) 2023/06/05

    Publisher: Springer Science and Business Media {LLC}

    DOI: 10.1038/s43246-023-00374-3  

    ISSN: 2662-4443

    More details Close

    <jats:title>Abstract</jats:title><jats:p>Liquid metal dealloying is a promising technique to produce bicontinuous porous metals with high specific surface areas. This processing technique relies on the selective dissolution of a component from a precursor alloy into a metal bath while the remaining insoluble component self-assembles into an interconnected structure. However, it has not been applied to produce nickel-containing porous metals because of the lack of a suitable metallic bath. Here we show that nickel-containing porous metals can be produced by partial liquid metal dealloying. The amount of soluble component in the resulting microstructure can be tuned by carefully choosing the bath element so that the ligaments of desired composition equilibrate with the metal bath. We demonstrate this partial liquid dealloying concept using magnesium and bismuth baths and rationalize the results through thermodynamics calculations. Furthermore, we apply this technique to produce porous nickel-containing stainless steel and high-entropy alloy.</jats:p>

  38. Dissimilar Joining of Immiscible Fe–Mg using Solid Metal Dealloying Peer-reviewed

    Kota Kurabayashi, Takeshi Wada, Hidemi Kato

    Scripta Materialia 230 2023/06

    DOI: 10.1016/j.scriptamat.2023.115404  

    ISSN: 1359-6462

  39. Change in local structure and hardness in the amorphization process of Zr45Cu45Al10 alloy by heavy ion irradiation Peer-reviewed

    F. Hori, Y. Morikuni, H. Obayashi, A. Iwase, T. Matsui, Y. Kaneno, T. Wada, H. Kato, N. Ishikawa

    Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 535 11-14 2023/02

    Publisher: Elsevier {BV}

    DOI: 10.1016/j.nimb.2022.11.007  

    ISSN: 0168-583X

  40. Fe2 0Mo2 0Ni2 0Rh2 0Ru2 0 and Fe1 4Mo3 5Ni1 5Rh1 5Ru2 1 Ultrahigh-Mixing-Entropy Alloys with Single Hexagonal Close-Packed Structure Peer-reviewed

    Akira Takeuch, Takeshi Wada, Kenji Amiya, Hidemi Kato, Takeshi Nagase

    MATERIALS TRANSACTIONS 64 (4) 841-848 2023/02

    DOI: 10.2320/matertrans.MT-M2022213  

    ISSN: 1345-9678

    eISSN: 1347-5320

  41. Three mechanical relaxation modes associated with nanoscale structural heterogeneity in Pd<inf>42.5</inf>Ni<inf>7.5</inf>Cu<inf>30</inf>P<inf>20</inf>fragile glass Peer-reviewed

    Hao Wang, Tetsu Ichitsubo, Hidemi Kato

    EPJ Applied Physics 98 2023

    DOI: 10.1051/epjap/2022220266  

    ISSN: 1286-0042

    eISSN: 1286-0050

  42. Microstructure evolution and deformation mechanism of α+ β dual-phase Ti-xNb-yTa-2Zr alloys with high performance

    Ting Zhang, Daixiu Wei, Eryi Lu, Wen Wang, Kuaishe Wang, Xiaoqing Li, Lai Chang Zhang, Hidemi Kato, Weijie Lu, Liqiang Wang

    Journal of Materials Science and Technology 131 68-81 2022/12/20

    DOI: 10.1016/j.jmst.2022.04.052  

    ISSN: 1005-0302

  43. Si-addition contributes to overcoming the strength-ductility trade-off in high-entropy alloys

    Daixiu Wei, Wu Gong, Tomohito Tsuru, Ivan Lobzenko, Xiaoqing Li, Stefanus Harjo, Takuro Kawasaki, Hyeon-Seok Do, Jae Wung Bae, Christian Wagner, Guillaume Laplanche, Yuichiro Koizumi, Hiroki Adachi, Kenta Aoyagi, Akihiko Chiba, Byeong-Joo Lee, Hyoung Seop Kim, Hidemi Kato

    International Journal of Plasticity 159 103443-103443 2022/12

    Publisher: Elsevier BV

    DOI: 10.1016/j.ijplas.2022.103443  

    ISSN: 0749-6419

  44. Strengthening of high-entropy alloys via modulation of cryo-pre-straining-induced defects

    Daixiu Wei, Wu Gong, Liqiang Wang, Bowen Tang, Takuro Kawasaki, Stefanus Harjo, Hidemi Kato

    Journal of Materials Science and Technology 129 251-260 2022/12/01

    DOI: 10.1016/j.jmst.2022.04.055  

    ISSN: 1005-0302

  45. Relationship between atomic structure and excellent glass forming ability in Pd<inf>42.5</inf>Ni<inf>7.5</inf>Cu<inf>30</inf>P<inf>20</inf> metallic glass

    Shinya Hosokawa, Jean François Bérar, Nathalie Boudet, Wolf Christian Pilgrim, László Pusztai, Satoshi Hiroi, Shinji Kohara, Hidemi Kato, Henry E. Fischer, Anita Zeidler

    Journal of Non-Crystalline Solids 596 2022/11/15

    DOI: 10.1016/j.jnoncrysol.2022.121868  

    ISSN: 0022-3093

  46. Mechanical behaviors of equiatomic and near-equiatomic face-centered-cubic phase high-entropy alloys probed using in situ neutron diffraction

    Daixiu Wei, Wu Gong, Tomohito Tsuru, Takuro Kawasaki, Stefanus Harjo, Biao Cai, Peter K. Liaw, Hidemi Kato

    International Journal of Plasticity 158 103417-103417 2022/11

    Publisher: Elsevier BV

    DOI: 10.1016/j.ijplas.2022.103417  

    ISSN: 0749-6419

  47. Intrinsic Correlation between the Fraction of Liquidlike Zones and the β Relaxation in High-Entropy Metallic Glasses

    Y. J. Duan, L. T. Zhang, J. C. Qiao, Yun Jiang Wang, Y. Yang, T. Wada, H. Kato, J. M. Pelletier, E. Pineda, D. Crespo

    Physical Review Letters 129 (17) 2022/10/21

    DOI: 10.1103/PhysRevLett.129.175501  

    ISSN: 0031-9007

    eISSN: 1079-7114

  48. High-entropy design and its influence on glass-forming ability in Zr–Cu-based metallic glass

    Y. Ohashi, T. Wada, H. Kato

    Journal of Alloys and Compounds 915 2022/09/15

    DOI: 10.1016/j.jallcom.2022.165366  

    ISSN: 0925-8388

  49. Ultrafine nanoporous intermetallic catalysts by high-temperature liquid metal dealloying for electrochemical hydrogen production

    Ruirui Song, Jiuhui Han, Masayuki Okugawa, Rodion Belosludov, Takeshi Wada, Jing Jiang, Daixiu Wei, Akira Kudo, Yuan Tian, Mingwei Chen, Hidemi Kato

    Nature Communications 13 (1) 2022/09/02

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41467-022-32768-1  

    eISSN: 2041-1723

    More details Close

    Abstract Intermetallic compounds formed from non-precious transition metals are promising cost-effective and robust catalysts for electrochemical hydrogen production. However, the development of monolithic nanoporous intermetallics, with ample active sites and sufficient electrocatalytic activity, remains a challenge. Here we report the fabrication of nanoporous Co7Mo6 and Fe7Mo6 intermetallic compounds via liquid metal dealloying. Along with the development of three-dimensional bicontinuous open porosity, high-temperature dealloying overcomes the kinetic energy barrier, enabling the direct formation of chemically ordered intermetallic phases. Unprecedented small characteristic lengths are observed for the nanoporous intermetallic compounds, resulting from an intermetallic effect whereby the chemical ordering during nanopore formation lowers surface diffusivity and significantly suppresses the thermal coarsening of dealloyed nanostructure. The resulting ultrafine nanoporous Co7Mo6 exhibits high catalytic activity and durability in electrochemical hydrogen evolution reactions. This study sheds light on the previously unexplored intermetallic effect in dealloying and facilitates the development of advanced intermetallic catalysts for energy applications.

  50. Role of Fe substitution for Co on thermal stability and glass-forming ability of soft magnetic Co-based Co-Fe-B-P-C metallic glasses

    Junpeng Ren, Yanhui Li, Xiaoyu Liang, Hidemi Kato, Wei Zhang

    Intermetallics 147 2022/08

    DOI: 10.1016/j.intermet.2022.107598  

    ISSN: 0966-9795

  51. Regulation of strength and ductility of single-phase twinning-induced plasticity high-entropy alloys

    Daixiu Wei, Wu Gong, Takuro Kawasaki, Stefanus Harjo, Hidemi Kato

    Scripta Materialia 216 2022/07/15

    DOI: 10.1016/j.scriptamat.2022.114738  

    ISSN: 1359-6462

  52. 3D interconnected nanoporous FeCo soft magnetic materials synthesized by liquid metal dealloying

    S. H. Joo, H. Kato

    Journal of Alloys and Compounds 908 2022/07/05

    DOI: 10.1016/j.jallcom.2022.164688  

    ISSN: 0925-8388

  53. Effect of physical aging and cyclic loading on power-law creep of high-entropy metallic glass

    Zhang, L., Duan, Y., Pineda, E., Kato, H., Pelletier, J.-M., Qiao, J.

    Journal of Materials Science and Technology 115 1-9 2022/07

    Publisher: Elsevier {BV}

    DOI: 10.1016/j.jmst.2021.10.043  

    ISSN: 1005-0302

  54. Sluggish dynamics of homogeneous flow in high-entropy metallic glasses

    L. T. Zhang, Y. J. Wang, E. Pineda, H. Kato, Y. Yang, J. C. Qiao

    Scripta Materialia 214 2022/06

    DOI: 10.1016/j.scriptamat.2022.114673  

    ISSN: 1359-6462

  55. Composition design, synthesis and hydrogen storage ability of multi-principal-component alloy TiVZrNbTa

    Zadorozhnyy, V., Tomilin, I., Berdonosova, E., Gammer, C., Zadorozhnyy, M., Savvotin, I., Shchetinin, I., Zheleznyi, M., Novikov, A., Bazlov, A., Serov, M., Milovzorov, G., Korol, A., Kato, H., Eckert, J., Kaloshkin, S., Klyamkin, S.

    Journal of Alloys and Compounds 901 163638-163638 2022/04

    Publisher: Elsevier {BV}

    DOI: 10.1016/j.jallcom.2022.163638  

    ISSN: 0925-8388

  56. Inhomogeneous dealloying kinetics along grain boundaries during liquid metal dealloying

    S. H. Joo, Y. B. Jeong, T. Wada, I. V. Okulov, H. Kato

    Journal of Materials Science and Technology 106 41-48 2022/04

    DOI: 10.1016/j.jmst.2021.07.023  

    ISSN: 1005-0302

  57. Analysis of the anelastic deformation of high-entropy Pd<inf>20</inf>Pt<inf>20</inf>Cu<inf>20</inf>Ni<inf>20</inf>P<inf>20</inf> metallic glass under stress relaxation and recovery

    Y. J. Duan, L. T. Zhang, T. Wada, H. Kato, E. Pineda, D. Crespo, J. M. Pelletier, J. C. Qiao

    Journal of Materials Science and Technology 107 82-91 2022/04

    DOI: 10.1016/j.jmst.2021.07.052  

    ISSN: 1005-0302

  58. Harnessing elastic anisotropy to achieve low-modulus refractory high-entropy alloys for biomedical applications

    Stephan Schönecker, Xiaojie Li, Daixiu Wei, Shogo Nozaki, Hidemi Kato, Levente Vitos, Xiaoqing Li

    Materials and Design 215 2022/03

    DOI: 10.1016/j.matdes.2022.110430  

    ISSN: 0264-1275

    eISSN: 1873-4197

  59. Metalloid substitution elevates simultaneously the strength and ductility of face-centered-cubic high-entropy alloys

    Daixiu Wei, Liqiang Wang, Yongjie Zhang, Wu Gong, Tomohito Tsuru, Ivan Lobzenko, Jing Jiang, Stefanus Harjo, Takuro Kawasaki, Jae Wung Bae, Wenjun Lu, Zhen Lu, Yuichiro Hayasaka, Takanori Kiguchi, Norihiko L. Okamoto, Tetsu Ichitsubo, Hyoung Seop Kim, Tadashi Furuhara, Evan Ma, Hidemi Kato

    Acta Materialia 225 2022/02/15

    DOI: 10.1016/j.actamat.2021.117571  

    ISSN: 1359-6454

  60. Solid solution induced back-stress in multi-principal element alloys: Experiment and modeling

    Yongju Kim, Peyman Asghari-Rad, Jungwan Lee, Gang Hee Gu, Minji Jang, Olivier Bouaziz, Yuri Estrin, Hidemi Kato, Hyoung Seop Kim

    Materials Science and Engineering: A 835 2022/02

    DOI: 10.1016/j.msea.2022.142621  

    ISSN: 0921-5093

  61. 金属溶湯脱成分によるポーラス金属開発

    和田 武, 加藤 秀実

    粉体および粉末冶金 69 (1) 27-33 2022/02

  62. Nanoimprinting of magnetic FeCo-based metallic glass thin films

    Xiaoyu Liang, Parmanand Sharma, Yan Zhang, Hidemi Kato

    Journal of Magnetism and Magnetic Materials 542 2022/01/15

    DOI: 10.1016/j.jmmm.2021.168455  

    ISSN: 0304-8853

  63. Work hardening behavior of hot-rolled metastable Fe<inf>50</inf>Co<inf>25</inf>Ni<inf>10</inf>Al<inf>5</inf>Ti<inf>5</inf>Mo<inf>5</inf> medium-entropy alloy: in situ neutron diffraction analysis

    Hyeonseok Kwon, Stefanus Harjo, Takuro Kawasaki, Wu Gong, Sang Guk Jeong, Eun Seong Kim, Praveen Sathiyamoorthi, Hidemi Kato, Hyoung Seop Kim

    Science and Technology of Advanced Materials 23 (1) 579-586 2022

    DOI: 10.1080/14686996.2022.2122868  

    ISSN: 1468-6996

    eISSN: 1878-5514

  64. Response to the commentary by Robert Tournier and Michael Ojovan on our publication entitled “Improving glass forming ability of off-eutectic metallic glass formers by manipulating primary crystallization reactions”

    Y. Q. Zeng, J. S. Yu, Y. Tian, A. Hirata, T. Fujita, X. H. Zhang, N. Nishiyama, H. Kato, J. Q. Jiang, A. Inoue, M. W. Chen

    Scripta Materialia 205 2021/12

    DOI: 10.1016/j.scriptamat.2021.114035  

    ISSN: 1359-6462

  65. Beyond strength-ductility trade-off: 3D interconnected heterostructured composites by liquid metal dealloying

    Yeon Beom Jeong, Takeshi Wada, Soo Hyun Joo, Jeong Min Park, Jongun Moon, Hyoung Seop Kim, Ilya Vladimirovich Okulov, Sung Hyuk Park, Jeong Hun Lee, Ki Buem Kim, Hidemi Kato

    Composites Part B: Engineering 225 2021/11/15

    DOI: 10.1016/j.compositesb.2021.109266  

    ISSN: 1359-8368

  66. Microstructure and corrosion study of Fe-based bulk metallic glass obtained by spark plasma sintering

    L. Zarazúa-Villalobos, N. Mary, J. Soo-Hyun, K. Ogawa, H. Kato, Y. Ichikawa

    Journal of Alloys and Compounds 880 2021/11/05

    DOI: 10.1016/j.jallcom.2021.160399  

    ISSN: 0925-8388

  67. Hierarchical heterostructured FeCr-(Mg-Mg2Ni) composite with 3D interconnected and lamellar structures synthesized by liquid metal dealloying

    Yeon Beom Jeong, Takeshi Wada, Soo-Hyun Joo, Jeong-Min Park, Hyoung Seop Kim, Ilya Vladimirovich Okulov, Ki Buem Kim, Hidemi Kato

    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 15 4573-4579 2021/11

    DOI: 10.1016/j.jmrt.2021.10.080  

    ISSN: 2238-7854

    eISSN: 2214-0697

  68. 2.3 GPa cryogenic strength through thermal-induced and deformation-induced body-centered cubic martensite in a novel ferrous medium entropy alloy

    Hyeonseok Kwon, Praveen Sathiyamoorthi, Gangaraju Manogna Karthik, Peyman Asghari-Rad, Alireza Zargaran, Hyeon Seok Do, Byeong Joo Lee, Hidemi Kato, Hyoung Seop Kim

    Scripta Materialia 204 2021/11

    DOI: 10.1016/j.scriptamat.2021.114157  

    ISSN: 1359-6462

  69. Superior phase transformation-assisted mechanical properties of a metastable medium-entropy ferrous alloy with heterogeneous microstructure

    Farahnaz Haftlang, Peyman Asghari-Rad, Jongun Moon, Sunghak Lee, Hidemi Kato, Hyoung Seop Kim

    Materials Letters 302 2021/11/01

    DOI: 10.1016/j.matlet.2021.130391  

    ISSN: 0167-577X

    eISSN: 1873-4979

  70. Evolution of 3D interconnected composites of high-entropy TiVNbMoTa alloys and Mg during liquid metal dealloying

    Soo Hyun Joo, Hidemi Kato, Ilya Vladimirovich Okulov

    Composites Part B: Engineering 222 2021/10/01

    DOI: 10.1016/j.compositesb.2021.109044  

    ISSN: 1359-8368

  71. Unusual two-step dealloying mechanism of nanoporous TiVNbMoTa high-entropy alloy during liquid metal dealloying

    Soo Hyun Joo, I. V. Okulov, H. Kato

    Journal of Materials Research and Technology 14 2945-2953 2021/09/01

    DOI: 10.1016/j.jmrt.2021.08.100  

    ISSN: 2238-7854

  72. Stress relaxation in high-entropy Pd<inf>20</inf>Pt<inf>20</inf>Cu<inf>20</inf>Ni<inf>20</inf>P<inf>20</inf> metallic glass: Experiments, modeling and theory

    Y. J. Duan, J. C. Qiao, T. Wada, H. Kato, E. Pineda, D. Crespo, Yun Jiang Wang

    Mechanics of Materials 160 2021/09

    DOI: 10.1016/j.mechmat.2021.103959  

    ISSN: 0167-6636

  73. Dynamic mechanical relaxation behavior of Zr<inf>35</inf>Hf<inf>17.5</inf>Ti<inf>5.5</inf>Al<inf>12.5</inf>Co<inf>7.5</inf>Ni<inf>12</inf>Cu<inf>10</inf> high entropy bulk metallic glass

    L. T. Zhang, Y. J. Duan, T. Wada, H. Kato, J. M. Pelletier, D. Crespo, E. Pineda, J. C. Qiao

    Journal of Materials Science and Technology 83 248-255 2021/08/30

    DOI: 10.1016/j.jmst.2020.11.074  

    ISSN: 1005-0302

  74. Electrochemically synthesized liquid-sulfur/sulfide composite materials for high-rate magnesium battery cathodes

    Kohei Shimokawa, Takuya Furuhashi, Tomoya Kawaguchi, Won Young Park, Takeshi Wada, Hajime Matsumoto, Hidemi Kato, Tetsu Ichitsubo

    Journal of Materials Chemistry A 9 (30) 16585-16593 2021/08/14

    DOI: 10.1039/d1ta03464b  

    ISSN: 2050-7488

    eISSN: 2050-7496

  75. New Ti/β-Ti alloy laminated composite processed by powder metallurgy: Microstructural evolution and mechanical property

    Weidong Zhang, Peng Yang, Yuankui Cao, Xi Li, Daixiu Wei, Hidemi Kato, Zhenggang Wu

    Materials Science and Engineering A 822 2021/08/03

    DOI: 10.1016/j.msea.2021.141702  

    ISSN: 0921-5093

  76. Identifying the high entropy characteristic in La-based metallic glasses

    Langting Zhang, Yajuan Duan, Daniel Crespo, Eloi Pineda, Takeshi Wada, Hidemi Kato, Jean Marc Pelletier, Jichao Qiao

    Applied Physics Letters 119 (5) 2021/08/02

    DOI: 10.1063/5.0059822  

    ISSN: 0003-6951

  77. In situ observation of liquid metal dealloying and etching of porous FeCr by X-ray tomography and X-ray diffraction

    Morgane Mokhtari, Christophe Le Bourlot, Jérome Adrien, Anne Bonnin, Wolfgang Ludwig, Pierre Antoine Geslin, Takeshi Wada, Jannick Duchet-Rumeau, Hidemi Kato, Eric Maire

    Materialia 18 2021/08

    DOI: 10.1016/j.mtla.2021.101125  

    eISSN: 2589-1529

  78. A strategy for enhancing the mechanical property of the precipitation-strengthened medium-entropy alloy

    Hai-Long Yi, Daixiu Wei, Ren-Yi Xie, Yi-Fan Zhang, Hidemi Kato

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 819 2021/07

    DOI: 10.1016/j.msea.2021.141390  

    ISSN: 0921-5093

    eISSN: 1873-4936

  79. Temperature- and strain-dependent thermally-activated deformation mechanism of a ferrous medium-entropy alloy

    Jungwan Lee, Jongun Moon, Jae Wung Bae, Jeong Min Park, Hyeonseok Kwon, Hidemi Kato, Hyoung Seop Kim

    Intermetallics 134 2021/07

    DOI: 10.1016/j.intermet.2021.107202  

    ISSN: 0966-9795

  80. Decoupling between calorimetric and dynamical glass transitions in high-entropy metallic glasses. International-journal

    Jing Jiang, Zhen Lu, Jie Shen, Takeshi Wada, Hidemi Kato, Mingwei Chen

    Nature communications 12 (1) 3843-3843 2021/06/22

    DOI: 10.1038/s41467-021-24093-w  

    eISSN: 2041-1723

  81. Relaxation Behavior and Heterogeneous Structures of Metallic Glasses

    Hiroshi TANIMURA, Tomoki HAYASHI, Martin LUCKABAUER, Tomoya KAWAGUCHI, Masato WAKEDA, Hidemi KATO, Tetsu ICHITSUBO

    Journal of the Society of Materials Science, Japan 70 (5) 374-380 2021/05/15

    Publisher: Society of Materials Science, Japan

    DOI: 10.2472/jsms.70.374  

    ISSN: 0514-5163

    eISSN: 1880-7488

  82. Inelastic deformation of metallic glasses under dynamic cyclic loading

    Y. J. Duan, J. C. Qiao, T. Wada, H. Kato, Y. J. Wang, E. Pineda, D. Crespo

    Scripta Materialia 194 2021/03/15

    DOI: 10.1016/j.scriptamat.2020.113675  

    ISSN: 1359-6462

  83. Anomalous compliance of interpenetrating-phase composite of Ti and Mg synthesized by liquid metal dealloying

    Ilya Vladimirovich Okulov, Jana Wilmers, Soo Hyun Joo, Swantje Bargmann, Hyoung Seop Kim, Hidemi Kato

    Scripta Materialia 194 2021/03/15

    DOI: 10.1016/j.scriptamat.2020.113660  

    ISSN: 1359-6462

  84. Microstructure refinement of a transformation-induced plasticity high-entropy alloy International-journal

    Hai Long Yi, Daixiu Wei, Ren Yi Xie, Yi Fan Zhang, Hidemi Kato

    Materials 14 (5) 1-14 2021/03/01

    DOI: 10.3390/ma14051196  

    eISSN: 1996-1944

  85. Detailed structural analysis of amorphous Pd<inf>40</inf>Cu<inf>40</inf>P<inf>20</inf>: Comparison with the metallic glass Pd<inf>40</inf>Ni<inf>40</inf>P<inf>20</inf> from the viewpoint of glass forming ability

    Shinya Hosokawa, Jean François Bérar, Nathalie Boudet, Wolf Christian Pilgrim, László Pusztai, Satoshi Hiroi, Shinji Kohara, Hidemi Kato, Henry E. Fischer, Anita Zeidler

    Journal of Non-Crystalline Solids 555 2021/03/01

    DOI: 10.1016/j.jnoncrysol.2020.120536  

    ISSN: 0022-3093

  86. Experimental and molecular dynamics studies of phase transformations during cryogenic thermal cycling in complex TiNi-based crystalline/amorphous alloys Peer-reviewed

    J. Jiang, W. S. Ko, S. H. Joo, D. X. Wei, T. Wada, H. Kato, D. V. Louzguine-Luzgin

    Journal of Alloys and Compounds 854 2021/02/15

    DOI: 10.1016/j.jallcom.2020.155379  

    ISSN: 0925-8388

  87. Novel Co-Cu-Based Immiscible Medium-Entropy Alloys with Promising Mechanical Properties

    Sujung Son, Jongun Moon, Hyeonseok Kwon, Peyman Asghari Rad, Hidemi Kato, Hyoung Seop Kim

    METALS 11 (2) 2021/02

    DOI: 10.3390/met11020238  

    eISSN: 2075-4701

  88. Effect of the synthesis conditions of Ce<inf>0.9</inf>Gd<inf>0.1</inf>O<inf>1.95</inf> powder on its morphology and characteristics of the oxygen ion-conducting ceramics obtained by spark plasma sintering

    D. V. Maslennikov, A. A. Matvienko, A. A. Sidelnikov, D. V. Dudina, M. A. Esikov, R. V. Belosludov, H. Kato

    Ceramics International 47 (2) 2557-2564 2021/01/15

    DOI: 10.1016/j.ceramint.2020.09.101  

    ISSN: 0272-8842

  89. Evolution of microstructural complex transitions in low-modulus β-type Ti-35Nb-2Ta-3Zr alloy manufactured by laser powder bed fusion

    Hafeez, N., Wei, D., Xie, L., Tang, Y., Liu, J., Kato, H., Lu, W., Zhang, L.-C., Wang, L.

    Additive Manufacturing 48 2021

    DOI: 10.1016/j.addma.2021.102376  

    ISSN: 2214-8604

  90. Effect of alloying elements on the microstructure and corrosion behavior of TiZr-based bulk metallic glasses Peer-reviewed

    Aléthéa Liens, Benoît Ter-Ovanessian, Nicolas Courtois, Damien Fabregue, Takeshi Wada, Hidemi Kato, Jérôme Chevalier

    Corrosion Science 177 2020/12

    DOI: 10.1016/j.corsci.2020.108854  

    ISSN: 0010-938X

  91. Mechanical properties and microstructural change in (Cu-Fe) immiscible metal matrix composite: Effect of Mg on secondary phase separation

    Yeon Beom Jeong, Hee Ra Jo, Hae Jin Park, Hidemi Kato, Ki Buem Kim

    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 9 (6) 15989-15995 2020/11

    DOI: 10.1016/j.jmrt.2020.11.049  

    ISSN: 2238-7854

    eISSN: 2214-0697

  92. Improving glass forming ability of off-eutectic metallic glass formers by manipulating primary crystallization reactions Peer-reviewed

    Y. Q. Zeng, J. S. Yu, Y. Tian, A. Hirata, T. Fujita, X. H. Zhang, N. Nishiyama, H. Kato, J. Q. Jiang, A. Inoue, M. W. Chen

    Acta Materialia 200 710-719 2020/11

    DOI: 10.1016/j.actamat.2020.09.042  

    ISSN: 1359-6454

  93. Nanoporous high-entropy alloy by liquid metal dealloying

    Artem Vladimirovich Okulov, Soo Hyun Joo, Hyoung Seop Kim, Hidemi Kato, Ilya Vladimirovich Okulov

    Metals 10 (10) 1-7 2020/10

    DOI: 10.3390/met10101396  

    eISSN: 2075-4701

  94. Hot deformation and dynamic recrystallization behavior of cocrni and (Cocrni)<inf>94</inf> ti<inf>3</inf> al<inf>3</inf> medium entropy alloys Peer-reviewed

    Hai Long Yi, Daixiu Wei, Yingchen Wang, Liqiang Wang, Ming Yang Fang, Kang Yang, Hidemi Kato

    Metals 10 (10) 1-14 2020/10

    DOI: 10.3390/met10101341  

    eISSN: 2075-4701

  95. Novel hierarchical nanoporous graphene nanoplatelets with excellent rate capabilities produced via self-templating liquid metal dealloying Peer-reviewed

    Won Young Park, Takeshi Wada, Soo Hyun Joo, Jiuhui Han, Hidemi Kato

    Materials Today Communications 24 2020/09

    DOI: 10.1016/j.mtcomm.2020.101120  

    eISSN: 2352-4928

  96. Fabrication of multi-blade crystals for hard-X-ray multi-beam imaging system Peer-reviewed

    Wataru Yashiro, Xiaoyu Liang, Wolfgang Voegeli, Takeshi Wada, Hidemi Kato, Kentaro Kajiwara

    JAPANESE JOURNAL OF APPLIED PHYSICS 59 (9) 2020/09

    DOI: 10.35848/1347-4065/abaac5  

    ISSN: 0021-4922

    eISSN: 1347-4065

  97. Effect of dealloying rate on transformation behavior during liquid metal dealloying Peer-reviewed

    Soo Hyun Joo, Hidemi Kato

    Journal of Alloys and Compounds 831 2020/08/05

    DOI: 10.1016/j.jallcom.2020.154733  

    ISSN: 0925-8388

  98. Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying. International-journal Peer-reviewed

    Ilya Vladimirovich Okulov, Soo-Hyun Joo, Artem Vladimirovich Okulov, Alexey Sergeevich Volegov, Bérengère Luthringer, Regine Willumeit-Römer, Laichang Zhang, Lutz Mädler, Jürgen Eckert, Hidemi Kato

    Nanomaterials (Basel, Switzerland) 10 (8) 2020/07/28

    DOI: 10.3390/nano10081479  

    More details Close

    Surface functionalization is an effective approach to change the surface properties of a material to achieve a specific goal such as improving the biocompatibility of the material. Here, the surface of the commercial biomedical Ti-6Al-7Nb alloy was functionalized through synthesizing of a porous surface layer by liquid metal dealloying (LMD). During LMD, the Ti-6Al-7Nb alloy is immersed in liquid magnesium (Mg) and both materials react with each other. Particularly, aluminum (Al) is selectively dissolved from the Ti-6Al-7Nb alloy into liquid Mg while titanium (Ti) and niobium (Nb) diffuse along the metal/liquid interface to form a porous structure. We demonstrate that the porous surface layer in the Ti-6Al-7Nb alloy can be successfully tailored by LMD. Furthermore, the concentration of harmful Al in this porous layer is reduced by about 48% (from 5.62 ± 0.11 wt.% to 2.95 ± 0.05 wt.%) after 30 min of dealloying at 1150 K. The properties of the porous layer (e.g., layer thickness) can be tuned by varying the dealloying conditions. In-vitro tests suggest improved bone formation on the functionalized porous surface of the Ti-6Al-7Nb alloy.

  99. Microstructures and mechanical properties of TiC-particulate-reinforced Ti–Mo–Al intermetallic matrix composites Peer-reviewed

    Y. Lu, M. Watanabe, R. Miyata, J. Nakamura, J. Yamada, H. Kato, K. Yoshimi

    Materials Science and Engineering A 790 139523-139523 2020/07/14

    Publisher: Elsevier BV

    DOI: 10.1016/j.msea.2020.139523  

    ISSN: 0921-5093

  100. Mg-based metallic glass-polymer composites: Investigation of structure, thermal properties, and biocompatibility Peer-reviewed

    Adit Sharma, Alexey Kopylov, Mikhail Zadorozhnyy, Andrei Stepashkin, Vera Kudelkina, Jun Qiang Wang, Sergey Ketov, Margarita Churyukanova, Dmitri Louzguine-Luzgin, Baran Sarac, Jürgen Eckert, Sergey Kaloshkin, Vladislav Zadorozhnyy, Hidemi Kato

    Metals 10 (7) 1-14 2020/07

    DOI: 10.3390/met10070867  

    eISSN: 2075-4701

  101. X-ray elastography by visualizing propagating shear waves Peer-reviewed

    Chika Kamezawa, Tomokazu Numano, Yoshihiko Kawabata, Hiroyasu Kanetaka, Maiko Furuya, Kotone Yokota, Hidemi Kato, Akio Yoneyama, Kazuyuki Hyodo, Wataru Yashiro

    Applied Physics Express 13 (4) 042004-042004 2020/04

    DOI: 10.35848/1882-0786/ab7e06  

    ISSN: 1882-0778

    eISSN: 1882-0786

  102. Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800 Peer-reviewed

    Morgane Mokhtari, Takeshi Wada, Christophe Le Bourlot, Jannick Duchet-Rumeau, Hidemi Kato, Eric Maire, Nicolas Mary

    Corrosion Science 166 2020/04

    DOI: 10.1016/j.corsci.2020.108468  

    ISSN: 0010-938X

    eISSN: 1879-0496

  103. The atomic structure of a bulk metallic glass resolved by scanning tunneling microscopy and ab-initio molecular dynamics simulation

    R. V. Belosludov, A. I. Oreshkin, S. I. Oreshkin, D. A. Muzychenko, H. Kato, D. V. Louzguine-Luzgin

    Journal of Alloys and Compounds 816 2020/03/05

    DOI: 10.1016/j.jallcom.2019.152680  

    ISSN: 0925-8388

  104. Ordering kinetics of nanoporous FeCo during liquid metal dealloying and the development of nanofacets

    Soo-Hyun Joo, Kunio Yubuta, Hidemi Kato

    Scripta Materialia 177 38-43 2020/03/01

    DOI: 10.1016/j.scriptamat.2019.10.007  

    ISSN: 1359-6462

  105. High-temperature mechanical behavior of B2-ordered Ti–Mo–Al alloys

    Lu, Y., Yamada, J., Miyata, R., Kato, H., Yoshimi, K.

    Intermetallics 117 2020/02/01

    DOI: 10.1016/j.intermet.2019.106675  

    ISSN: 0966-9795

  106. Beating Thermal Coarsening in Nanoporous Materials via High-Entropy Design Peer-reviewed

    Soo Hyun Joo, Jae Wung Bae, Won Young Park, Yusuke Shimada, Takeshi Wada, Hyoung Seop Kim, Akira Takeuchi, Toyohiko J. Konno, Hidemi Kato, Ilya V. Okulov

    Advanced Materials 32 (6) e1906160 2020/02/01

    DOI: 10.1002/adma.201906160  

    ISSN: 0935-9648

    eISSN: 1521-4095

  107. Transformation mechanisms and governing orientation relationships through selective dissolution of Ni via liquid metal dealloying from (FeCo)xNi100−x precursors

    Joo, S.-H., Kato, H.

    Materials and Design 185 2020/01/05

    DOI: 10.1016/j.matdes.2019.108271  

    ISSN: 0264-1275

  108. Mechanical Properties of FeCr-Based Composite Materials Elaborated by Liquid Metal Dealloying towards Bioapplication Peer-reviewed

    Morgane Mokhtari, Christophe Le Bourlot, Jannick Duchet-Rumeau, Eugénie Godet, Pierre Antoine Geslin, Sylvain Dancette, Takeshi Wada, Hidemi Kato, Eric Maire

    Advanced Engineering Materials 22 (12) 2020

    DOI: 10.1002/adem.202000381  

    ISSN: 1438-1656

    eISSN: 1527-2648

  109. Novel alpha plus beta Type Ti-Fe-Cu Alloys Containing Sn with Pertinent Mechanical Properties Peer-reviewed

    Vladislav Zadorozhnyy, Sergey V. Ketov, Takeshi Wada, Stefan Wurster, Vignesh Nayak, Dmitri V. Louzguine-Luzgin, Juergen Eckert, Hidemi Kato

    METALS 10 (1) 2020/01

    DOI: 10.3390/met10010034  

    eISSN: 2075-4701

  110. Soot-combustion catalyst of Pd/ZrO2 composites prepared from Zr65Pd35 amorphous alloy by oxidation treatment Peer-reviewed

    Masakuni Ozawa, Atsuhiko Masuda, Maki Nakamura, Masatomo Hattori, Hidemi Kato, Shin-ichi Yamamura

    JAPANESE JOURNAL OF APPLIED PHYSICS 59 (0) inpress 2020/01

    DOI: 10.7567/1347-4065/ab45fb  

    ISSN: 0021-4922

    eISSN: 1347-4065

  111. Selective deposition of platinum hemispheres on the {100} facets of synthetic diamond

    Boris B. Bokhonov, Dina V. Dudina, Hidemi Kato, Takeshi Wada

    Diamond and Related Materials 101 2020/01

    DOI: 10.1016/j.diamond.2019.107620  

    ISSN: 0925-9635

  112. Characterization of nanoscale detonation carbon produced in a pulse gas-detonation device

    A. A. Shtertser, D. K. Rybin, V. Yu Ulianitsky, W. Park, M. Datekyu, T. Wada, H. Kato

    Diamond and Related Materials 101 2020/01

    DOI: 10.1016/j.diamond.2019.107553  

    ISSN: 0925-9635

  113. Development of strong and ductile metastable face-centered cubic single-phase high-entropy alloys

    Daixiu Wei, Xiaoqing Li, Stephan Schönecker, Jing Jiang, Won Mi Choi, Byeong Joo Lee, Hyoung Seop Kim, Akihiko Chiba, Hidemi Kato

    Acta Materialia 181 318-330 2019/12

    DOI: 10.1016/j.actamat.2019.09.050  

    ISSN: 1359-6454

  114. Synthesis of Nano-Sized TiB2 and TiC Particles During Spark Plasma Sintering of Ball-Milled Ti-Cu Alloy + B(C) and Ti+Cu+B mixtures

    Dina V. Dudina, Tomila M. Vidyuk, Michail A. Korchagin, Natalia V. Bulina, Masanari Datekyu, Hidemi Kato

    IOP Conference Series: Materials Science and Engineering 678 (1) 2019/11/28

    Publisher: IOP Publishing Ltd

    DOI: 10.1088/1757-899X/678/1/012012  

    ISSN: 1757-899X 1757-8981

  115. Development of porous FeCo by liquid metal dealloying: Evolution of porous morphology and effect of interaction between ligaments and melt

    Soo Hyun Joo, Takeshi Wada, Hidemi Kato

    Materials and Design 180 2019/10/15

    DOI: 10.1016/j.matdes.2019.107908  

    ISSN: 0264-1275

    eISSN: 1873-4197

  116. Introducing dislocations locally in Al-supersaturated α<inf>2</inf>-Ti<inf>3</inf>Al single crystal via nanoscale wedge indentation Peer-reviewed

    Daixiu Wei, Yuichiro Koizumi, Makoto Nagasako, Yusuke Kubota, Tomoyuki Aoyagi, Yuki Nakagawa, Masahiko Yoshino, Akihiko Chiba, Hidemi Kato

    Intermetallics 113 2019/10

    DOI: 10.1016/j.intermet.2019.106557  

    ISSN: 0966-9795

  117. Septenary Zr–Hf–Ti–Al–Co–Ni–Cu high-entropy bulk metallic glasses with centimeter-scale glass-forming ability

    Takeshi Wada, Jing Jiang, Kunio Yubuta, Hidemi Kato, Akira Takeuchi

    Materialia 7 2019/09

    DOI: 10.1016/j.mtla.2019.100372  

    eISSN: 2589-1529

  118. Partial structure investigation of the traditional bulk metallic glass Pd40Ni40 P20 Peer-reviewed

    Shinya Hosokawa, Jean François Bérar, Nathalie Boudet, Wolf Christian Pilgrim, László Pusztai, Satoshi Hiroi, Kenji Maruyama, Shinji Kohara, Hidemi Kato, Henry E. Fischer, Anita Zeidler

    Physical Review B 100 (5) 2019/08/28

    DOI: 10.1103/PhysRevB.100.054204  

    ISSN: 2469-9950

    eISSN: 2469-9969

  119. Phase-field investigation of the coarsening of porous structures by surface diffusion Peer-reviewed

    Pierre Antoine Geslin, Mickaël Buchet, Takeshi Wada, Hidemi Kato

    Physical Review Materials 3 (8) 2019/08/08

    DOI: 10.1103/PhysRevMaterials.3.083401  

    ISSN: 2475-9953

    eISSN: 2475-9953

  120. On microstructural homogenization and mechanical properties optimization of biomedical Co-Cr-Mo alloy additively manufactured by using electron beam melting

    Daixiu Wei, Ainiwaer Anniyaer, Yuichiro Koizumi, Kenta Aoyagi, Makoto Nagasako, Hidemi Kato, Akihiko Chiba

    Additive Manufacturing 28 215-227 2019/08

    DOI: 10.1016/j.addma.2019.05.010  

    eISSN: 2214-8604

  121. Formation of metallic glass coatings by detonation spraying of a Fe<inf>66</inf> Cr<inf>10</inf> Nb<inf>5</inf> B<inf>19</inf> powder Peer-reviewed

    Ivanna D. Kuchumova, Igor S. Batraev, Vladimir Yu Ulianitsky, Alexandr A. Shtertser, Konstantin B. Gerasimov, Arina V. Ukhina, Natalia V. Bulina, Ivan A. Bataev, Guilherme Yuuki Koga, Yaofeng Guo, Walter José Botta, Hidemi Kato, Takeshi Wada, Boris B. Bokhonov, Dina V. Dudina, Alberto Moreira Jorge

    Metals 9 (8) 2019/08

    DOI: 10.3390/met9080846  

    eISSN: 2075-4701

  122. Nano-imprinting potential of magnetic FeCo-based metallic glass Peer-reviewed

    Liang Xiaoyu, Sharma Parmanand, Zhang Yan, Makino Akihiro, Kato Hidemi

    NANOTECHNOLOGY 30 (30) 305302-305302 2019/07/26

    DOI: 10.1088/1361-6528/ab115e  

    ISSN: 0957-4484

    eISSN: 1361-6528

  123. Structural heterogeneities and mechanical behavior of amorphous alloys

    Qiao, J.C., Wang, Q., Pelletier, J.M., Kato, H., Casalini, R., Crespo, D., Pineda, E., Yao, Y., Yang, Y.

    Progress in Materials Science 104 250-329 2019/07/01

    DOI: 10.1016/j.pmatsci.2019.04.005  

    ISSN: 0079-6425

  124. Interaction of a Ti-Cu alloy with carbon: Synthesis of composites and model experiments Peer-reviewed

    Dudina, D.V., Vidyuk, T.M., Korchagin, M.A., Gavrilov, A.I., Bulina, N.V., Esikov, M.A., Datekyu, M., Kato, H.

    Materials 12 (9) 2019/05/01

    DOI: 10.3390/ma12091482  

    ISSN: 1996-1944

  125. Novel Co-rich high performance twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) high-entropy alloys Peer-reviewed

    Daixiu Wei, Xiaoqing Li, Jing Jiang, Weicheng Heng, Yuichiro Koizumi, Won Mi Choi, Byeong Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba

    Scripta Materialia 165 39-43 2019/05

    DOI: 10.1016/j.scriptamat.2019.02.018  

    ISSN: 1359-6462

  126. Decreasing activation energy of fast relaxation processes in a metallic glass during aging

    Luckabauer, M., Hayashi, T., Kato, H., Ichitsubo, T.

    Physical Review B 99 (14) 2019/04/19

    DOI: 10.1103/PhysRevB.99.140202  

    ISSN: 2469-9969 2469-9950

  127. Anomalously low modulus of the interpenetrating-phase composite of Fe and Mg obtained by liquid metal dealloying

    Okulov, I.V., Geslin, P.-A., Soldatov, I.V., Ovri, H., Joo, S.-H., Kato, H.

    Scripta Materialia 163 133-136 2019/04/01

    DOI: 10.1016/j.scriptamat.2019.01.017  

    ISSN: 1359-6462

  128. Low cost high specific surface architectured nanoporous metal with corrosion resistance produced by liquid metal dealloying from commercial nickel superalloy

    Morgane Mokhtari, Takeshi Wada, Christophe Le Bourlot, Nicolas Mary, Jannick Duchet-Rumeau, Hidemi Kato, Eric Maire

    Scripta Materialia 163 5-8 2019/04

    DOI: 10.1016/j.scriptamat.2018.12.023  

    ISSN: 1359-6462

  129. Structure and mechanical properties of Ti-Based alloys containing Ag subjected to a thermomechanical treatment

    Vladislav Zadorozhnyy, Alexey Kopylov, Mikhail Gorshenkov, Elena Shabanova, Mikhail Zadorozhnyy, Alexander Novikov, Aleksey Maksimkin, Takeshi Wada, Dmitri V. Louzguine-Luzgin, Hidemi Kato

    Journal of Alloys and Compounds 781 1182-1188 2019/04

    DOI: 10.1016/j.jallcom.2018.12.152  

    ISSN: 0925-8388

  130. Porous Ti-based bulk metallic glass with excellent mechanical properties and good biocompatibility

    Guoqiang Xie, Guoqiang Xie, Hiroyasu Kanetaka, Hidemi Kato, Fengxiang Qin, Wei Wang

    Intermetallics 105 153-162 2019/02/01

    DOI: 10.1016/j.intermet.2018.12.002  

    ISSN: 0966-9795

    eISSN: 1879-0216

  131. Novel Co-rich high entropy alloys with superior tensile properties Peer-reviewed

    Daixiu Wei, Xiaoqing Li, Weicheng Heng, Yuichiro Koizumi, Feng He, Won Mi Choi, Byeong Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba

    Materials Research Letters 7 (2) 82-88 2019/02/01

    DOI: 10.1080/21663831.2018.1553803  

    ISSN: 2166-3831

    eISSN: 2166-3831

  132. Formation of TiC-Cu nanocomposites by a reaction between Ti25Cu75 melt-spun alloy and carbon Peer-reviewed

    Dudina, D.V., Korchagin, M.A., Gavrilov, A.I., Bulina, N.V., Batraev, I.S., Esikov, M.A., Georgarakis, K., Kato, H.

    Materials Letters 235 104-106 2019/01/15

    DOI: 10.1016/j.matlet.2018.10.002  

    ISSN: 0167-577X

  133. 高エントロピー合金の室温構造緩和

    岡本範彦, LUCKABAUER Martin, 渡辺宏眸, 山本篤史郎, 林好一, 加藤秀実, 市坪哲

    粉体粉末冶金協会講演大会(Web) 2019 2019

  134. High-entropy alloys with hexagonal close-packed structure in Ir<inf>26</inf>Mo<inf>20</inf>Rh<inf>22.5</inf>Ru<inf>20</inf>W<inf>11.5</inf> and Ir<inf>25.5</inf>Mo<inf>20</inf>Rh<inf>20</inf>Ru<inf>25</inf>W<inf>9.5</inf> alloys designed by sandwich strategy for the valence electron concentration of constituent elements in the periodic chart Peer-reviewed

    Akira Takeuchi, Takeshi Wada, Hidemi Kato

    Materials Transactions 60 (8) 1666-1673 2019

    DOI: 10.2320/matertrans.M2019037  

    ISSN: 1345-9678

  135. Solid Solutions with bcc, hcp, and fcc Structures Formed in a Composition Line in Multicomponent Ir–Rh–Ru–W–Mo System Peer-reviewed

    Akira Takeuchi, Takeshi Wada, Hidemi Kato

    Materials Transactions 60 (11) 2267-2276 2019

    DOI: 10.2320/matertrans.MT-M2019212  

    ISSN: 1345-9678

  136. Nanoporous magnesium

    Ilya Vladimirovich Okulov, Sviatlana V. Lamaka, Takeshi Wada, Kunio Yubuta, Mikhail L. Zheludkevich, Jörg Weissmüller, Jürgen Markmann, Hidemi Kato

    Nano Research 11 (12) 6428-6435 2018/12/01

    DOI: 10.1007/s12274-018-2167-9  

    ISSN: 1998-0124

    eISSN: 1998-0000

  137. A Ni-, Al-, Be-free Zr-based metallic glass for biomedical applications

    Oriane Baulin, Damien Fabrègue, Hidemi Kato, Takeshi Wada, Sandra Balvay, Daniel J. Hartmann, Jean Marc Pelletier

    Journal of Non-Crystalline Solids 500 78-83 2018/11/15

    DOI: 10.1016/j.jnoncrysol.2018.06.026  

    ISSN: 0022-3093

  138. The mechanical cycling behavior of TiNi based crystal/glassy alloy in the superelastic mode

    J. Jiang, D. X. Wei, T. Wada, D. V. Louzguine-Luzgin, H. Kato

    Journal of Alloys and Compounds 768 176-180 2018/11/05

    DOI: 10.1016/j.jallcom.2018.07.255  

    ISSN: 0925-8388

  139. Electronic structures and heterogeneity of Zr-Cu-Ag metallic glasses

    Shinya Hosokawa, Hitoshi Sato, Masashi Nakatake, Hidemi Kato

    Journal of Non-Crystalline Solids 498 281-287 2018/10/15

    DOI: 10.1016/j.jnoncrysol.2018.06.036  

    ISSN: 0022-3093

  140. Porous NiTi particle dispersed Mg-Zn-Ca bulk metallic glass matrix composites Peer-reviewed

    Guo, W., Kato, H., L{\"u}, S., Wu, S.

    Materials 11 (10) 2018/10

    DOI: 10.3390/ma11101959  

    ISSN: 1996-1944

  141. Microstructure characterization by X-ray tomography and EBSD of porous FeCr produced by liquid metal dealloying

    Morgane Mokhtari, Christophe Le Bourlot, Jérome Adrien, Anne Bonnin, Takeshi Wada, Jannick Duchet-Rumeau, Hidemi Kato, Eric Maire

    Materials Characterization 144 166-172 2018/10

    DOI: 10.1016/j.matchar.2018.06.032  

    ISSN: 1044-5803

  142. Imaging of 3D morphological evolution of nanoporous silicon anode in lithium ion battery by X-ray nano-tomography

    Chonghang Zhao, Takeshi Wada, Vincent De Andrade, Doğa Gürsoy, Hidemi Kato, Yu chen Karen Chen-Wiegart

    Nano Energy 52 381-390 2018/10

    DOI: 10.1016/j.nanoen.2018.08.009  

    ISSN: 2211-2855

  143. X-ray imaging with x-ray grating interferometry -Future potentials for materials research

    Wataru, Yashiro, Chika, Kamezawa, Masanari, Datekyu, Hidemi, Kato, Daiji, Noda, Kentaro, Kajiwara, Wolfgang, Vogeli, Ryosuke, Ueda, Hiroyuki, Kudo

    Abstract Book of 13th International Workshop on Biomaterials in Interface Science Paper No. C-09 2018/08

  144. Open porous dealloying-based biomaterials as a novel biomaterial platform

    I. V. Okulov, A. V. Okulov, I. V. Soldatov, B. Luthringer, R. Willumeit-Römer, T. Wada, H. Kato, J. Weissmüller, J. Markmann

    Materials Science and Engineering C 88 95-103 2018/07/01

    DOI: 10.1016/j.msec.2018.03.008  

    ISSN: 0928-4931

  145. Viscoelasticity of Cu- and La-based bulk metallic glasses: Interpretation based on the quasi-point defects theory

    J. C. Qiao, Y. X. Chen, J. M. Pelletier, H. Kato, D. Crespo, Y. Yao, V. A. Khonik

    Materials Science and Engineering A 719 164-170 2018/03/14

    Publisher: Elsevier Ltd

    DOI: 10.1016/j.msea.2018.02.046  

    ISSN: 0921-5093

  146. On the potential of Bulk Metallic Glasses for dental implantology: Case study on Ti40Zr10Cu36Pd14 Peer-reviewed

    Alethea Liens, Aurélien Etiemble, Pascaline Rivory, Sandra Balvay, Jean-Marc Pelletier, Sandrine Cardinal, Damien Fabrègue, Hidemi Kato, Philippe Steyer, Tais Munhoz, Jerome Adrien, Nicolas Courtois, Daniel J. Hartmann, Jérôme Chevalier

    Materials 11 (2) 2018/02/06

    Publisher: MDPI AG

    DOI: 10.3390/ma11020249  

    ISSN: 1996-1944

  147. A new, toxic element-free Mg-based metallic glass for biomedical applications

    Oriane Baulin, Damien Fabrègue, Hidemi Kato, Aléthéa Liens, Takeshi Wada, Jean-Marc Pelletier

    Journal of Non-Crystalline Solids 481 397-402 2018/02/01

    Publisher: Elsevier B.V.

    DOI: 10.1016/j.jnoncrysol.2017.11.024  

    ISSN: 0022-3093

  148. Structural characterization of carbon-based materials obtained by spark plasma sintering of non-graphitic carbon with nickel and iron as catalysts and space holders

    Ukhina, A.V., Bokhonov, B.B., Dudina, D.V., Yubuta, K., Kato, H.

    Ceramic Transactions 261 2018

    Publisher: Ceramic Transactions

    DOI: 10.1002/9781119423829.ch10  

    ISSN: 1042-1122

  149. Optimizing imprinting condition for high aspect grating of Pd-based metallic glass

    Datekyu, M., Yashiro, W., Momose, A., Kato, H.

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 65 (1) 52-56 2018/01

    DOI: 10.2497/jjspm.65.52  

    ISSN: 0532-8799

  150. Preparation of hierarchical porous metals by two-step liquid metal dealloying

    Takeshi Wada, Pierre-Antoine Geslin, Hidemi Kato

    SCRIPTA MATERIALIA 142 101-105 2018/01

    DOI: 10.1016/j.scriptamat.2017.08.038  

    ISSN: 1359-6462

  151. Mechanical properties, electrochemical behavior and biocompatibility of the Ti-based low-alloys containing a minor fraction of noble metals

    V. Yu. Zadorozhnyy, D. S. Kozak, X. Shi, T. Wada, D. V. Louzguine-Luzgin, H. Kato

    JOURNAL OF ALLOYS AND COMPOUNDS 732 915-921 2018/01

    DOI: 10.1016/j.jallcom.2017.10.231  

    ISSN: 0925-8388

    eISSN: 1873-4669

  152. A novel method of surface modification by electrochemical deoxidation: Effect on surface characteristics and initial bioactivity of zirconia Peer-reviewed

    Juan Liu, Guang Hong, Yu-Han Wu, Kosei Endo, Jian-Min Han, Hiroyuki Kumamoto, Takeshi Wada, Hidemi Kato, Ping Gao, Keiichi Sasaki

    JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS 105 (8) 2641-2652 2017/11

    DOI: 10.1002/jbm.b.33805  

    ISSN: 1552-4973

    eISSN: 1552-4981

  153. The influence of the formation of Fe3C on graphitization in a carbon-rich iron-amorphous carbon mixture processed by Spark Plasma Sintering and annealing Peer-reviewed

    Dina V. Dudina, Arina V. Ukhina, Boris B. Bokhonov, Michail A. Korchagin, Natalia V. Bulina, Hidemi Kato

    CERAMICS INTERNATIONAL 43 (15) 11902-11906 2017/10

    DOI: 10.1016/j.ceramint.2017.06.038  

    ISSN: 0272-8842

    eISSN: 1873-3956

  154. Three-Dimensional Morphological and Chemical Evolution of Nanoporous Stainless Steel by Liquid Metal Dealloying Peer-reviewed

    Chonghang Zhao, Takeshi Wada, Vincent De Andrade, Garth J. Williams, Jeff Gelb, Li Li, Juergen Thieme, Hidemi Kato, Yu-chen Karen Chen-Wiegart

    ACS APPLIED MATERIALS & INTERFACES 9 (39) 34172-34184 2017/10

    DOI: 10.1021/acsami.7b04659  

    ISSN: 1944-8244

  155. Effect of the cooling rate on the mechanical properties of Ti-Ni-Cu-Zr-based crystal/glassy alloys Peer-reviewed

    J. Jiang, S. Ketov, H. Kato, D. V. Louzguine-Luzgin

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 704 147-153 2017/09

    DOI: 10.1016/j.msea.2017.08.016  

    ISSN: 0921-5093

    eISSN: 1873-4936

  156. Multiwalled carbon nanotube forests grown on the surface of synthetic diamond crystals Peer-reviewed

    B. B. Bokhonov, A. V. Ukhina, D. V. Dudina, H. Katsui, T. Goto, H. Kato

    CERAMICS INTERNATIONAL 43 (13) 10606-10609 2017/09

    DOI: 10.1016/j.ceramint.2017.05.021  

    ISSN: 0272-8842

    eISSN: 1873-3956

  157. Development of in-situ beta-Ti reinforced Be-free Ti-based bulk metallic glass matrix composites Peer-reviewed

    Wei Guo, Hidemi Kato

    JOURNAL OF ALLOYS AND COMPOUNDS 714 120-125 2017/08

    DOI: 10.1016/j.jallcom.2017.04.218  

    ISSN: 0925-8388

    eISSN: 1873-4669

  158. ナノオープンポーラスSiを用いたリチウムイオン二次電池負極特性と電極体積変化 Peer-reviewed

    和田 武, 加藤 秀実

    まてりあ 56 (7) 438-442 2017/07/01

    Publisher:

    DOI: 10.2320/materia.56.438  

    ISSN: 1340-2625

  159. Electrochemical behavior and biocompatibility of Ti-Fe-Cu alloy with high strength and ductility Peer-reviewed

    V. Yu. Zadorozhnyy, X. Shi, D. S. Kozak, T. Wada, J. Q. Wang, H. Kato, D. V. Louzguine-Luzgin

    JOURNAL OF ALLOYS AND COMPOUNDS 707 291-297 2017/06

    DOI: 10.1016/j.jallcom.2016.11.213  

    ISSN: 0925-8388

    eISSN: 1873-4669

  160. Mechanical properties, structure, and biocompatibility of dual-axially forged Ti94Fe3Au3, Ti94Fe3Nb3, and Ti94Au3Nb3 alloys Peer-reviewed

    V. Yu. Zadorozhnyy, X. Shi, A. N. Kopylov, I. V. Shchetinin, T. Wada, D. V. Louzguine-Luzgin, H. Kato

    JOURNAL OF ALLOYS AND COMPOUNDS 707 269-274 2017/06

    DOI: 10.1016/j.jallcom.2016.11.349  

    ISSN: 0925-8388

    eISSN: 1873-4669

  161. Effect of substituting elements on thermal stability and glass-forming ability of an Al-based Al-Ni-Er metallic glass Peer-reviewed

    Wei Zhang, Siquan Chen, Zhengwang Zhu, Hao Wang, Yanhui Li, Hidemi Kato, Haifeng Zhang

    JOURNAL OF ALLOYS AND COMPOUNDS 707 97-101 2017/06

    DOI: 10.1016/j.jallcom.2016.11.423  

    ISSN: 0925-8388

    eISSN: 1873-4669

  162. Fabrication and mechanical properties of bulk metallic glass matrix composites by in-situ dealloying method Peer-reviewed

    Wei Guo, Hidemi Kato, Rui Yamada, Junji Saida

    JOURNAL OF ALLOYS AND COMPOUNDS 707 332-336 2017/06

    DOI: 10.1016/j.jallcom.2016.10.167  

    ISSN: 0925-8388

    eISSN: 1873-4669

  163. Cold-rolling influence on microstructure and mechanical properties of NiCr-Ag composites and porous NiCr obtained by liquid metal dealloying Peer-reviewed

    Morgane Mokhtari, Christophe Le Bourlot, Jerome Adrien, Sylvain Dancette, Takeshi Wada, Jannick Duchet-Rumeau, Hidemi Kato, Eric Maire

    JOURNAL OF ALLOYS AND COMPOUNDS 707 251-256 2017/06

    DOI: 10.1016/j.jallcom.2016.12.105  

    ISSN: 0925-8388

    eISSN: 1873-4669

  164. Edge-illumination x-ray phase contrast imaging with Pt-based metallic glass masks Peer-reviewed

    Somayeh Saghamanesh, Seyed Mahmoud-Reza Aghamiri, Alessandro Olivo, Maryam Sadeghilarijani, Hidemi Kato, Alireza Kamali-Asl, Wataru Yashiro

    REVIEW OF SCIENTIFIC INSTRUMENTS 88 (6) 2017/06

    DOI: 10.1063/1.4989700  

    ISSN: 0034-6748

    eISSN: 1089-7623

  165. Development of Multi-colored Neutron Talbot-Lau Interferometer with Absorption Grating Fabricated by Imprinting Method of Metallic Glass Peer-reviewed

    Yoshichika Seki, Takenao Shinohara, Joseph D. Parker, Wataru Yashiro, Atsushi Momose, Kosuke Kato, Hidemi Kato, Maryam Sadeghilaridjani, Yoshie Otake, Yoshiaki Kiyanagi

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 86 (4) 044001 2017/04

    DOI: 10.7566/JPSJ.86.044001  

    ISSN: 0031-9015

  166. Structure and properties of ultrafine-grained CoCrFeMnNi high-entropy alloys produced by mechanical alloying and spark plasma sintering Peer-reviewed

    S. -H. Joo, H. Kato, M. J. Jang, J. Moon, E. B. Kim, S. -J. Hong, H. S. Kim

    JOURNAL OF ALLOYS AND COMPOUNDS 698 591-604 2017/03

    DOI: 10.1016/j.jallcom.2016.12.010  

    ISSN: 0925-8388

    eISSN: 1873-4669

  167. Effect of B2-ordered phase on the deformation behavior of Ti-Mo-Al alloys at elevated temperature Peer-reviewed

    Yuanyuan Lu, Jyunpei Yamada, Junya Nakamura, Kyosuke Yoshimi, Hidemi Kato

    JOURNAL OF ALLOYS AND COMPOUNDS 696 130-135 2017/03

    DOI: 10.1016/j.jallcom.2016.11.211  

    ISSN: 0925-8388

    eISSN: 1873-4669

  168. Tensile deformation behavior and deformation twinning of an equimolar CoCrFeMnNi high-entropy alloy Peer-reviewed

    S. -H. Joo, H. Kato, M. J. Jang, J. Moon, C. W. Tsai, J. W. Yeh, H. S. Kim

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 689 122-133 2017/03

    DOI: 10.1016/j.msea.2017.02.043  

    ISSN: 0921-5093

    eISSN: 1873-4936

  169. ひずみ解放機構を有するオープンセル型バルクナノポーラスシリコン材料の合成技術

    和田 武, 市坪 哲, 加藤 秀実

    全固体電池のイオン伝導性向上技術と材料、製造プロセス開発 251-257 2017/02/28

    Publisher: (株)技術情報協会

  170. Three dimensional analysis of nanoporous silicon particles for Li-ion batteries Peer-reviewed

    Lucian Roiban, Siddardha Koneti, Takeshi Wada, Hidemi Kato, Francisco J. Cadete Santos Aires, Sergiu Curelea, Thierry Epicier, Eric Maire

    MATERIALS CHARACTERIZATION 124 165-170 2017/02

    DOI: 10.1016/j.matchar.2016.12.013  

    ISSN: 1044-5803

    eISSN: 1873-4189

  171. Phonon excitations in Pd<inf>40</inf>Ni<inf>40</inf>P<inf>20</inf> bulk metallic glass by inelastic X-ray scattering

    Shinya Hosokawa, Masanori Inui, Yukio Kajihara, Tetsu Ichitsubo, Kazuhiro Matsuda, Hidemi Kato, Ayano Chiba, Koji Kimura, Kenji Kamimura, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q.R. Baron

    Materials Science Forum 879 767-772 2017

    DOI: 10.4028/www.scientific.net/MSF.879.767  

    ISSN: 0255-5476

    eISSN: 1662-9752

  172. Morphological features of W- and Ni-containing coatings on diamond crystals and properties of diamond-copper composites obtained by Spark Plasma Sintering Peer-reviewed

    A. Ukhina, B. Bokhonov, D. Samoshkin, S. Stankus, D. Dudina, E. Galashov, H. Katsui, T. Goto, H. Kato

    MATERIALS TODAY-PROCEEDINGS 4 (11) 11396-11401 2017

    ISSN: 2214-7853

  173. Formation of extremely high-aspect Si sub-micron patterns with smooth wall for MEMS and X-ray devices Peer-reviewed

    Hayato Komatsu, Wataru Yashiro, Hidemi Kato, Johji Kagami, Kentaro Totsu, Masashi Nakao

    2017 INTERNATIONAL CONFERENCE ON ELECTRONICS PACKAGING (ICEP) 487-490 2017

  174. Preparation of Nanoporous Si by Dealloying in Metallic Melt and Its Application for Negative Electrode of Lithium Ion Battery Peer-reviewed

    Takeshi Wada, Hidemi Kato

    MATERIALS TODAY-PROCEEDINGS 4 (11) 11465-11469 2017

    ISSN: 2214-7853

  175. Mechanical Proeprties and Biocompatibility of the Ti-Baed Low-Alloys Minor Alloying by the Noble Metals Peer-reviewed

    V.Y. Zadorozhnyy, X.T. Shi, T. Wada, H. Kato, D.V. Louguine-Luzgin

    Nano Hybrids and Composites 13 63-68 2017/01

    DOI: 10.4028/www.scientific.net/NHC.13.63  

    ISSN: 2297-3400

  176. High aspect ratio grating by isochronal imprinting of less viscous workable Gd-based metallic glass for neutron phase imaging Peer-reviewed

    Maryam Sadeghilaridjani, Kosuke Kato, Takenao Shinohara, Wataru Yashiro, Atsushi Momose, Hidemi Kato

    INTERMETALLICS 78 55-63 2016/11

    DOI: 10.1016/j.intermet.2016.09.004  

    ISSN: 0966-9795

    eISSN: 1879-0216

  177. Work-hardenable Mg-based bulk metallic glass matrix composites reinforced by ex-situ porous shape-memory-alloy particles Peer-reviewed

    Wei Guo, Takeshi Wada, Hidemi Kato

    MATERIALS LETTERS 183 454-458 2016/11

    DOI: 10.1016/j.matlet.2016.07.082  

    ISSN: 0167-577X

    eISSN: 1873-4979

  178. 金属液体の中で形成する共連続型ポーラス金属

    加藤秀実, 和田

    まてりあ 55 (11) 519-527 2016/11/01

    Publisher: The Japan Institute of Metals and Materials

    DOI: 10.2320/materia.55.519  

    ISSN: 1340-2625

  179. Enlarging the surface area of an electrolytic capacitor of porous niobium by Mg-Ce eutectic liquid dealloying Peer-reviewed

    Joung Wook Kim, Takeshi Wada, Sung Gyoo Kim, Hidemi Kato

    SCRIPTA MATERIALIA 122 68-71 2016/09

    DOI: 10.1016/j.scriptamat.2016.05.014  

    ISSN: 1359-6462

  180. 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

  181. Evolution of a bicontinuous nanostructure via a solid-state interfacial dealloying reaction Peer-reviewed

    Takeshi Wada, Kunio Yubuta, Hidemi Kato

    SCRIPTA MATERIALIA 118 33-36 2016/06

    DOI: 10.1016/j.scriptamat.2016.03.008  

    ISSN: 1359-6462

  182. Enhanced Wear Resistivity of a Zr-based Bulk Metallic Glass Processed by High-Pressure Torsion Under Reciprocating Dry Conditions Peer-reviewed

    Soo-Hyun Joo, Dong-Hai Pi, Jing Guo, Hidemi Kato, Sunghak Lee, Hyoung Seop Kim

    METALS AND MATERIALS INTERNATIONAL 22 (3) 383-390 2016/05

    DOI: 10.1007/s12540-016-5331-3  

    ISSN: 1598-9623

    eISSN: 2005-4149

  183. Fracture and fatigue characteristics under torsional stressing in Zr-based bulk metallic glass

    Kazutaka Fujita, Hiroyuki Nishikawa, Tohru Yamasaki, Hidemi Kato

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 63 (4) 223-229 2016/04/01

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

    DOI: 10.2497/jjspm.63.223  

    ISSN: 0532-8799

  184. Effects of noble metal additons on plastic deformation of Zr-Cu-Ni-Al based bulk metallic glasses

    Tohru Yamasaki, Masahiro Yamada, Kazutaka Fujita, Hidemi Kato, Do Hyang Kim

    Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 63 (4) 230-238 2016/04/01

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

    DOI: 10.2497/jjspm.63.230  

    ISSN: 0532-8799

  185. Ti-Ag-Pd alloy with good mechanical properties and high potential for biological applications

    V. Yu. Zadorozhnyy, X. Shi, M. V. Gorshenkov, D. S. Kozak, T. Wada, D. V. Louzguine-Luzgin, A. Inoue, H. Kato

    SCIENTIFIC REPORTS 6 2016/04

    DOI: 10.1038/srep25142  

    ISSN: 2045-2322

  186. X-ray phase imaging using a Gd-based absorption grating fabricated by imprinting technique Peer-reviewed

    Wataru Yashiro, Kosuke Kato, Maryam Sadeghilaridjani, Atsushi Momose, Takenao Shinohara, Hidemi Kato

    JAPANESE JOURNAL OF APPLIED PHYSICS 55 (4) 048003 2016/04

    DOI: 10.7567/JJAP.55.048003  

    ISSN: 0021-4922

    eISSN: 1347-4065

  187. Preparation of three-dimensional nanoporous Si using dealloying by metallic melt and application as a lithium-ion rechargeable battery negative electrode Peer-reviewed

    Takeshi Wada, Junpei Yamada, Hidemi Kato

    JOURNAL OF POWER SOURCES 306 8-16 2016/02

    DOI: 10.1016/j.jpowsour.2015.11.079  

    ISSN: 0378-7753

    eISSN: 1873-2755

  188. Early Science Commissioning Results of the Sub-micron Resolution X-ray Spectroscopy Beamline (SRX) in the Field of Materials Science and Engineering Peer-reviewed

    Yu-chen Karen Chen-Wiegart, Garth Williams, Chonghang Zhao, Hua Jiang, Li Li, Michael Demkowicz, Matteo Seita, Mike Short, Sara Ferry, Takeshi Wada, Hidemi Kato, Kang Wei Chou, Stanislas Petrash, Jaclyn Catalano, Yao Yao, Anna Murphy, Nicholas Zumbulyadis, Silvia A. Centeno, Cecil Dybowski, Juergen Thieme

    ICXOM23: INTERNATIONAL CONFERENCE ON X-RAY OPTICS AND MICROANALYSIS 1764 030004 2016

    DOI: 10.1063/1.4961138  

    ISSN: 0094-243X

  189. Selective growth of silver particles on the facets of synthetic diamond Peer-reviewed

    B. B. Bokhonov, H. Kato

    CRYSTENGCOMM 18 (39) 7430-7434 2016

    DOI: 10.1039/c6ce01536k  

    ISSN: 1466-8033

  190. Three-dimensional bicontinuous porous graphite generated in low temperature metallic liquid Peer-reviewed

    Seung-Geun Yu, Kunio Yubuta, Takeshi Wada, Hidemi Kato

    CARBON 96 403-410 2016/01

    DOI: 10.1016/j.carbon.2015.09.093  

    ISSN: 0008-6223

    eISSN: 1873-3891

  191. Development of a high-damping NiTi shape-memory-alloy-based composite Peer-reviewed

    Wei Guo, Hidemi Kato

    MATERIALS LETTERS 158 1-4 2015/11

    DOI: 10.1016/j.matlet.2015.05.143  

    ISSN: 0167-577X

    eISSN: 1873-4979

  192. Development and microstructure optimization of Mg-based metallic glass matrix composites with in situ B2-NiTi dispersoids Peer-reviewed

    Wei Guo, Hidemi Kato

    MATERIALS & DESIGN 83 238-248 2015/10

    DOI: 10.1016/j.matdes.2015.06.033  

    ISSN: 0264-1275

    eISSN: 1873-4197

  193. The study on interface and property of TiNb/Zr-based metallic glassy composite fabricated by SPS Peer-reviewed

    Zhenhua Chu, Guangyin Yuan, Hidemi Kato, Guoqiang Xie, Dianran Yan

    JOURNAL OF NON-CRYSTALLINE SOLIDS 426 83-87 2015/10

    DOI: 10.1016/j.jnoncrysol.2015.07.008  

    ISSN: 0022-3093

    eISSN: 1873-4812

  194. The effect of size and volume fraction of the reinforcement on mechanical property and deformation mechanism of the bulk metallic glassy composite Peer-reviewed

    Zhenhua Chu, Guangyin Yuan, Hidemi Kato, Guoqiang Xie, Dianran Yan

    JOURNAL OF ALLOYS AND COMPOUNDS 644 25-29 2015/09

    DOI: 10.1016/j.jallcom.2015.04.172  

    ISSN: 0925-8388

    eISSN: 1873-4669

  195. Submicron-porous NiTi and NiTiNb shape memory alloys with high damping capacity fabricated by a new top-down process Peer-reviewed

    Wei Guo, Hidemi Kato

    Materials and Design 78 74-79 2015/08/05

    Publisher: Elsevier Ltd

    DOI: 10.1016/j.matdes.2015.04.028  

    ISSN: 1873-4197 0261-3069

  196. Submicron-porous NiTi and NiTiNb shape memory alloys with high damping capacity fabricated by a new top-down process Peer-reviewed

    Wei Guo, Hidemi Kato

    MATERIALS & DESIGN 78 74-79 2015/08

    DOI: 10.1016/j.matdes.2015.04.028  

    ISSN: 0264-1275

    eISSN: 1873-4197

  197. Bulk metallic glasses based on precious metals: Thermal treatments and mechanical properties Peer-reviewed

    S. Cardinal, J. Qiao, J. M. Pelletier, H. Kato

    INTERMETALLICS 63 73-79 2015/08

    DOI: 10.1016/j.intermet.2015.04.003  

    ISSN: 0966-9795

    eISSN: 1879-0216

  198. Investigation of structure-mechanical properties relations of dual-axially forged Ti-based low-alloys Peer-reviewed

    V. Yu. Zadorozhnyy, I. V. Shchetinin, M. V. Zheleznyi, N. V. Chirikov, T. Wada, H. Kato, D. V. Louzguine-Luzgin

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 632 88-95 2015/04

    DOI: 10.1016/j.msea.2015.02.065  

    ISSN: 0921-5093

    eISSN: 1873-4936

  199. Insight on the process ability of bulk metallic glasses by thermo-mechanical analysis and dynamic mechanical analysis Peer-reviewed

    J. C. Qiao, S. Cardinal, J. M. Pelletier, H. Kato

    JOURNAL OF ALLOYS AND COMPOUNDS 628 357-363 2015/04

    DOI: 10.1016/j.jallcom.2014.12.166  

    ISSN: 0925-8388

    eISSN: 1873-4669

  200. Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion Peer-reviewed

    Soo-Hyun Joo, Dong-Hai Pi, Albertus Deny Heri Setyawan, Hidemi Kato, Milos Janecek, Yong Chan Kim, Sunghak Lee, Hyoung Seop Kim

    Scientific Reports 5 9660-1-9660-2 2015/04

    DOI: 10.1038/srep09660  

    ISSN: 2045-2322

  201. ひずみ解放機構を有するオープンセル型バルクナノポーラス材料のリチウム蓄電池負極特性

    市坪 哲, 和田 武, 加藤 秀実

    Engineering Materials 63 (3) 38-44 2015/03

    Publisher: 日刊工業新聞社

    ISSN: 0452-2834

  202. Optimizing niobium dealloying with metallic melt to fabricate porous structure for electrolytic capacitors Peer-reviewed

    Joung Wook Kim, Masashi Tsuda, Takeshi Wada, Kunio Yubuta, Sung Gyoo Kim, Hidemi Kato

    ACTA MATERIALIA 84 497-505 2015/02

    DOI: 10.1016/j.actamat.2014.11.002  

    ISSN: 1359-6454

    eISSN: 1873-2453

  203. Surface improvement for biocompatibility of ti-6al-4v by dealloying in metallic melt

    Fukuzumi, Y., Kato, H.

    Interface Oral Health Science 2014: Innovative Research on Biosis-Abiosis Intelligent Interface 2015

    Publisher: Interface Oral Health Science 2014: Innovative Research on Biosis-Abiosis Intelligent Interface

    DOI: 10.1007/978-4-431-55192-8_8  

  204. 17aCL-11 Studies of Phonon Excitations in Glassy, Supercooled liquid, and liquid Pd_<42.5>Ni_<7.5>Cu_<30>P_<20> by Inelastic X-ray Scattering

    Hosokawa S., Inui M., Kajihara Y., Ichitsubo T., Kato H., Tsutsui S., Baron A. Q. R.

    Meeting Abstracts of the Physical Society of Japan 70 1389-1389 2015

    Publisher: The Physical Society of Japan (JPS)

    DOI: 10.11316/jpsgaiyo.70.2.0_1389  

    ISSN: 2189-079X

  205. A Combination of Anomalous X-ray Scattering and Neutron Diffraction for Structural Characterizations of Zr45Cu45Ag10 Metallic Glass Peer-reviewed

    Shinya Hosokawa, Jens Stellhorn, Wolf-Christian Pilgrim, Nathalie Boudet, Nils Blanc, Shinji Kohara, Hiroo Tajiri, Hidemi Kato, Yukinobu Kawakita, Toshiya Otomo

    JPS Conf. Proc. 8 031002-(1-6) 2015

  206. The effect of matrix fracture toughness on the plastic deformation of the metallic glassy composite Peer-reviewed

    Zhenhua Chu, Guangyin Yuan, Hidemi Kato, Guoqiang Xie, Dianran Yan

    JOURNAL OF ALLOYS AND COMPOUNDS 612 10-15 2014/11

    DOI: 10.1016/j.jallcom.2014.05.170  

    ISSN: 0925-8388

    eISSN: 1873-4669

  207. Impact of the structural state on the mechanical properties in a Zr-Co-Al bulk metallic glass Peer-reviewed

    J. C. Qiao, J. M. Pelletier, C. Esnouf, Y. Liu, H. Kato

    JOURNAL OF ALLOYS AND COMPOUNDS 607 139-149 2014/09

    DOI: 10.1016/j.jallcom.2014.04.008  

    ISSN: 0925-8388

    eISSN: 1873-4669

  208. Bulk-Nanoporous-Silicon Negative Electrode with Extremely High Cyclability for Lithium-Ion Batteries Prepared Using a Top-Down Process Peer-reviewed

    Takeshi Wada, Tetsu Ichitsubo, Kunio Yubuta, Haruhiko Segawa, Hirokazu Yoshida, Hidemi Kato

    NANO LETTERS 14 (8) 4505-4510 2014/08

    DOI: 10.1021/nl501500g  

    ISSN: 1530-6984

    eISSN: 1530-6992

  209. Correlation between the enhanced plasticity of glassy matrix composites and the volume fraction, size and intrinsic mechanical property of reinforcements Peer-reviewed

    Chu, Z.H., Kato, H., Xie, G.Q., Yan, D.R., Yuan, G.Y.

    Materials Science Forum 783-786 1967-1970 2014/04/25

    Publisher: Materials Science Forum

    DOI: 10.4028/www.scientific.net/msf.783-786.1967  

    ISSN: 1662-9752 0255-5476

  210. Characteristics of the Structural and Johari-Goldstein Relaxations in Pd-Based Metallic Glass-Forming Liquids Peer-reviewed

    Jichao Qiao, Riccardo Casalini, Jean-Marc Pelletier, Hidemi Kato

    JOURNAL OF PHYSICAL CHEMISTRY B 118 (13) 3720-3730 2014/04

    DOI: 10.1021/jp4121782  

    ISSN: 1520-6106

  211. Pronounced tensile plasticity at room temperature in a Au65Cu10.5Ag7.5Si17 metallic glass Peer-reviewed

    J. C. Qiao, H. Wang, J. M. Pelletier, H. Kato

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 600 32-36 2014/04

    DOI: 10.1016/j.msea.2014.02.007  

    ISSN: 0921-5093

    eISSN: 1873-4936

  212. A metallic glass grating for X-ray grating interferometers fabricated by imprinting Peer-reviewed

    Wataru Yashiro, Daiji Noda, Tadashi Hattori, Kouichi Hayashi, Atsushi Momose, Hidenni Kato

    APPLIED PHYSICS EXPRESS 7 (3) 032501-1-032501-3 2014/03

    DOI: 10.7567/APEX.7.032501  

    ISSN: 1882-0778

    eISSN: 1882-0786

  213. Volume and Enthalpy Relaxation in Pd42.5Cu30Ni7.5P20 Bulk Metallic Glass Peer-reviewed

    O. Haruyama, T. Moftate, K. Morita, N. Yamamoto, H. Kato, T. Egami

    MATERIALS TRANSACTIONS 55 (3) 466-472 2014/03

    DOI: 10.2320/matertrans.MBW201320  

    ISSN: 1345-9678

    eISSN: 1347-5320

  214. Sub-micron porous niobium solid electrolytic capacitor prepared by dealloying in a metallic melt Peer-reviewed

    Joung Wook Kim, Takeshi Wada, Sung Gyoo Kim, Hidemi Kato

    MATERIALS LETTERS 116 223-226 2014/02

    DOI: 10.1016/j.matlet.2013.11.036  

    ISSN: 0167-577X

    eISSN: 1873-4979

  215. Amorphousization and superconducting property for Zr-Nb based alloy

    Okai, D., Mori, K., Motoyama, G., Kimura, H., Kato, H.

    Materials Science Forum 783-786 2014

    Publisher: Materials Science Forum

    DOI: 10.4028/www.scientific.net/msf.783-786.2503  

    ISSN: 1662-9752 0255-5476

  216. Existence of covalent-like bonding in Pd40Cu20Ge40 metallic glass observed by anomalous x-ray scattering Peer-reviewed

    T. Yamamoto, S. Hosokawa, J-F Berar, N. Boudet, W-C Pilgrim, K. Hayashi, H. Kato

    REXS 2013 - WORKSHOP ON RESONANT ELASTIC X-RAY SCATTERING IN CONDENSED MATTER 519 (1) 2014

    DOI: 10.1088/1742-6596/519/1/012005  

    ISSN: 1742-6588

  217. Solid Argon Precipitation in a Metallic Glass: Does Free-Volume Help? Peer-reviewed

    T. Miyauchi, H. Kato, E. Abe

    MATERIALS RESEARCH LETTERS 2 (2) 94-99 2014

    DOI: 10.1080/21663831.2013.869270  

    ISSN: 2166-3831

  218. A combination of anomalous x-ray scattering and neutron diffraction for structural characterizations of Zr63Ni25Al12 metallic glass Peer-reviewed

    S. Hosokawa, J-F Berar, N. Boudet, S. Kohara, J. Stellhorn, W-C Pilgrim, A. Zeidler, H. Kato, Y. Kawakita, T. Otomo

    1ST CONFERENCE ON LIGHT AND PARTICLE BEAMS IN MATERIALS SCIENCE 2013 (LPBMS2013) 502 012023-1-012023-4 2014

    DOI: 10.1088/1742-6596/502/1/012023  

    ISSN: 1742-6588

  219. Effect of cobalt microalloying on the glass forming ability of Ti-Cu-Pd-Zr metallic glass Peer-reviewed

    H. Wang, E. S. Park, J. J. Oak, A. D. Setyawan, S. L. Zhu, T. Wada, X. M. Wang, A. Takeuchi, H. Kato

    JOURNAL OF NON-CRYSTALLINE SOLIDS 379 155-160 2013/11

    DOI: 10.1016/j.jnoncrysol.2013.08.001  

    ISSN: 0022-3093

    eISSN: 1873-4812

  220. High power diode laser cladding of Fe-Co-B-Si-C-Nb amorphous coating: Layered microstructure and properties Peer-reviewed

    Y. Y. Zhu, Z. G. Li, R. F. Li, M. Li, K. Feng, Y. X. Wu, T. Wada, H. Kato

    SURFACE & COATINGS TECHNOLOGY 235 699-705 2013/11

    DOI: 10.1016/j.surfcoat.2013.08.050  

    ISSN: 0257-8972

  221. Mg-based metallic glass matrix composite with in situ porous titanium dispersoids by dealloying in metallic melt Peer-reviewed

    Hideki Oka, Wei Guo, Takeshi Wada, Hidemi Kato

    Materials Science and Engineering A 582 (10) 76-83 2013/10

    DOI: 10.1016/j.msea.2013.06.015  

    ISSN: 0921-5093

  222. Enhanced Mechanical Properties by Cyclic Compression in TiNb/Zr-Based Metallic Glassy Composite Peer-reviewed

    Z. H. Chu, H. Kato, G. Q. Xie, G. Y. Yuan, W. J. Ding

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 44A (10) 4595-4600 2013/10

    DOI: 10.1007/s11661-013-1821-9  

    ISSN: 1073-5623

    eISSN: 1543-1940

  223. 3D morphological evolution of porous titanium by x-ray micro- and nano-tomography Invited Peer-reviewed

    Yu-Chen Karen Chen-Wiegart, Takeshi Wada, Nikita Butakov, Xianghui Xiao, Francesco De Carlo, Hidemi Kato, Jun Wang, David C. Dunand, Eric Maire

    Journal of Materials Research 28 (17) 2444-2452 2013/09/14

    DOI: 10.1557/jmr.2013.151  

    ISSN: 0884-2914 2044-5326

  224. Kinetics of formation and coarsening of nanoporous alpha-titanium dealloyed with Mg melt Peer-reviewed

    Masashi Tsuda, Takeshi Wada, Hidemi Kato

    JOURNAL OF APPLIED PHYSICS 114 (11) 2013/09

    DOI: 10.1063/1.4821066  

    ISSN: 0021-8979

  225. ZrCu-Based Metallic Glass Matrix Composites with Ta Dispersoid by In Situ Dealloying Method Peer-reviewed

    Wei Guo, Kunio Yubuta, Hidemi Kato

    MATERIALS TRANSACTIONS 54 (8) 1416-1422 2013/08

    DOI: 10.2320/matertrans.M2013102  

    ISSN: 1345-9678

    eISSN: 1347-5320

  226. Non-Monotonic Aging Temperature Dependence of Superelasticity of Ti72Nb15Zr10Al3 Quaternary Alloys Peer-reviewed

    Hiroyuki Tada, Tokujiro Yamamoto, Xinmin Wang, Hidemi Kato

    MATERIALS TRANSACTIONS 54 (8) 1502-1509 2013/08

    DOI: 10.2320/matertrans.M2013120  

    ISSN: 1345-9678

    eISSN: 1347-5320

  227. 卑・半金属およびそれらの合金によるオープンセル型ポーラス材料の開発 Peer-reviewed

    加藤秀実, 和田武, 津田雅史

    まてりあ 52 (08) 395-403 2013/08/01

    Publisher: The Japan Institute of Metals and Materials

    DOI: 10.2320/materia.52.395  

    ISSN: 1340-2625

  228. Pd42.5Ni7.5Cu30P20金属ガラスの動的緩和挙動 Invited Peer-reviewed

    加藤秀実, 市坪哲, 王昊 和田武

    J. Jpn. Soc. Powder Powder Metallurgy 60 (5) 228-235 2013/05/15

    DOI: 10.2497/jjspm.60.228  

    ISSN: 0532-8799

  229. Three-dimensional open-cell macroporous iron, chromium and ferritic stainless steel Peer-reviewed

    Takeshi Wada, Hidemi Kato

    SCRIPTA MATERIALIA 68 (9) 723-726 2013/05

    DOI: 10.1016/j.scriptamat.2013.01.011  

    ISSN: 1359-6462

  230. Viscous flow of Cu55Zr30Ti10Co5 bulk metallic glass in glass-transition and semi-solid regions Peer-reviewed

    S. V. Ketov, A. Inoue, H. Kato, D. V. Louzguine-Luzgin

    SCRIPTA MATERIALIA 68 (3-4) 219-222 2013/02

    DOI: 10.1016/j.scriptamat.2012.10.037  

    ISSN: 1359-6462

  231. Toughening mechanism of Zr-based and Cu-based bulk metallic glasses composites by TiNb particle

    Chu, Z., Yuan, G., Hidemi, K., Ding, W.

    Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 42 (6) 2013

    ISSN: 1002-185X

  232. Study on correlation between complex relaxation phenomena and elastic heterogeneity in metallic glasses Peer-reviewed

    T. Ichitsubo, S. Yukitani, E. Matsubara, H. Kato

    Zairyo/Journal of the Society of Materials Science, Japan 62 (3) 167-171 2013

    Publisher: The Society of Materials Science, Japan

    DOI: 10.2472/jsms.62.167  

    ISSN: 0514-5163 1880-7488

  233. Preparation of the catalyst for methanol steam reforming from Cr-Zr amorphous alloys Peer-reviewed

    Toshiya Matsusako, Takami Kai, Tsutomu Nakazato, Hisamichi Kimura, Takashi Goto, Hidemi Kato

    ECO-MATERIALS PROCESSING AND DESIGN XIV 761 7-+ 2013

    DOI: 10.4028/www.scientific.net/MSF.761.7  

    ISSN: 0255-5476

  234. Shear banding behavior and fracture mechanisms of Zr55Al10Ni5Cu30 bulk metallic glass in uniaxial compression analyzed using a digital image correlation method Peer-reviewed

    Soo-Hyun Joo, Hidemi Kato, Kapil Gangwar, Sunghak Lee, Hyoung Seop Kim

    INTERMETALLICS 32 21-29 2013/01

    DOI: 10.1016/j.intermet.2012.08.013  

    ISSN: 0966-9795

  235. Correlation between the enhanced plasticity of glassy matrix composites and the intrinsic mechanical property of reinforcement Peer-reviewed

    Z. H. Chu, H. Kato, G. Q. Xie, G. Y. Yuan, C. Lu, W. J. Ding

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 560 40-46 2013/01

    DOI: 10.1016/j.msea.2012.08.118  

    ISSN: 0921-5093

  236. Surface-activated supercooled liquid brazing Peer-reviewed

    Hidemi Kato, Seung-Geun Yu, Albertus D. Setyawan, Kunio Yubuta, Takeshi Wada

    Scripta Materialia 68 (9) 699-702 2013

    DOI: 10.1016/j.scriptamat.2013.01.016  

    ISSN: 1359-6462

  237. Effect of Al Addition on Superelastic Properties of Aged Ti-Nb-Zr-Al Quaternary Alloys Peer-reviewed

    Hiroyuki Tada, Tokujiro Yamamoto, Xinmin Wang, Hidemi Kato

    MATERIALS TRANSACTIONS 53 (11) 1981-1985 2012/11

    DOI: 10.2320/matertrans.M2012184  

    ISSN: 1345-9678

    eISSN: 1347-5320

  238. Enhance the thermal stability and glass forming ability of Al-based metallic glass by Ca minor-alloying Peer-reviewed

    J. Q. Wang, Y. H. Liu, S. Imhoff, N. Chen, D. V. Louzguine-Luzgin, A. Takeuchi, M. W. Chen, H. Kato, J. H. Perepezko, A. Inoue

    INTERMETALLICS 29 35-40 2012/10

    DOI: 10.1016/j.intermet.2012.04.009  

    ISSN: 0966-9795

  239. A partial structure factor investigation of the bulk metallic glass Zr63Ni25Al12 as studied by using a combination of anomalous X-ray scattering and reverse Monte Carlo modeling Peer-reviewed

    Shinya Hosokawa, Jean-Francois Berar, Nathalie Boudet, Shinji Kohara, Wolf-Christian Pilgrim, Maike Joester, Jens Stellhorn, Anita Zeidler, Kenji Maruyama, Toshio Nasu, Wei Zhang, Hidemi Kato

    INTERNATIONAL JOURNAL OF MATERIALS RESEARCH 103 (9) 1108-1112 2012/09

    DOI: 10.3139/146.110774  

    ISSN: 1862-5282

  240. Constitutive model for high temperature deformation behavior of Ti-Zr-Ni-Be bulk metallic glass in supercooled liquid region Peer-reviewed

    H. -J. Jun, K. S. Lee, H. Kato, H. S. Kim, Y. W. Chang

    COMPUTATIONAL MATERIALS SCIENCE 61 213-223 2012/08

    DOI: 10.1016/j.commatsci.2012.04.006  

    ISSN: 0927-0256

  241. The effect of nanoquasicrystals on mechanical properties of as-extruded Mg-Zn-Gd alloy Peer-reviewed

    Hua Huang, Hidemi Kato, Chunlin Chen, Zhongchang Wang, Guangyin Yuan

    MATERIALS LETTERS 79 281-283 2012/07

    DOI: 10.1016/j.matlet.2012.04.018  

    ISSN: 0167-577X

  242. Evaluation of compressive deformation behavior of Zr55Al10Ni5Cu30 bulk metallic glass containing ZrC particles by synchrotron X-ray diffraction Peer-reviewed

    H. Suzuki, J. Saida, T. Shobu, J. Katsuyama, H. Kato, M. Imafuku, S. Sato

    SCRIPTA MATERIALIA 66 (10) 801-804 2012/05

    DOI: 10.1016/j.scriptamat.2012.02.016  

    ISSN: 1359-6462

  243. Relationship between the Reinforcement Size and Mechanical Properties of Zr-Based Glassy Matrix Composites Peer-reviewed

    Zhenhua Chu, Hidemi Kato, Takeshi Wada, Guoqiang Xie, Guangyin Yuan, Wenjiang Ding

    MATERIALS TRANSACTIONS 53 (5) 879-884 2012/05

    DOI: 10.2320/matertrans.M2011367  

    ISSN: 1345-9678

    eISSN: 1347-5320

  244. Consolidation and mechanical properties of Cu46Zr42Al7Y5 metallic glass by spark plasma sintering Peer-reviewed

    Z. H. Chu, H. Kato, G. Q. Xie, G. Y. Yuan, W. J. Ding, A. Inoue

    JOURNAL OF NON-CRYSTALLINE SOLIDS 358 (10) 1263-1267 2012/05

    DOI: 10.1016/j.jnoncrysol.2012.02.027  

    ISSN: 0022-3093

  245. The effect of Co addition on glassy forming ability and soft magnetic properties of Fe-Si-B-P bulk metallic glass Peer-reviewed

    Li, X., Zhang, Y., Kato, H., Makino, A., Inoue, A.

    Key Engineering Materials 508 112-116 2012

    Publisher: Key Engineering Materials

    DOI: 10.4028/www.scientific.net/KEM.508.112  

    ISSN: 1662-9795 1013-9826

  246. 金属溶湯中で生じる脱成分反応を用いた卑・半金属系ポーラス材料の開発と傾斜機能材料への応用 Invited Peer-reviewed

    加藤秀実, 和田

    セラミックス 47 (12) 913-919 2012

    Publisher:

    ISSN: 0009-031X

  247. Imprinting of Metallic Glasses: A Simple Approach to Making Durable Terahertz High-Pass Filters Peer-reviewed

    Yen Chen Chen, Tsong Ru Tsai, Jinn P. Chu, Hsuan Sung, Jason S. C. Jang, Hidemi Kato

    APPLIED PHYSICS EXPRESS 5 (1) 012201-1-012201-3 2012/01

    DOI: 10.1143/APEX.5.012201  

    ISSN: 1882-0778

    eISSN: 1882-0786

  248. Pd20Pt20Cu20Ni20P20 high-entropy alloy as a bulk metallic glass in the centimeter Peer-reviewed

    A. Takeuchi, N. Chen, T. Wada, Y. Yokoyama, H. Kato, A. Inoue, J. W. Yeh

    INTERMETALLICS 19 (10) 1546-1554 2011/10

    DOI: 10.1016/j.intermet.2011.05.030  

    ISSN: 0966-9795

    eISSN: 1879-0216

  249. Nano- to submicro-porous beta-Ti alloy prepared from dealloying in a metallic melt Peer-reviewed

    Takeshi Wada, Albertus Deny Setyawan, Kunio Yubuta, Hidemi Kato

    SCRIPTA MATERIALIA 65 (6) 532-535 2011/09

    DOI: 10.1016/j.scriptamat.2011.06.019  

    ISSN: 1359-6462

  250. Fe76Si9.6B8.4P6 glassy powder soft-magnetic cores with low core loss prepared by spark-plasma sintering Peer-reviewed

    Xue Li, Akihiro Makino, Hidemi Kato, Akihisa Inoue, Takeshi Kubota

    MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS 176 (15) 1247-1250 2011/09

    DOI: 10.1016/j.mseb.2011.06.017  

    ISSN: 0921-5107

  251. Improved plasticity of iron-based high-strength bulk metallic glasses by copper-induced nanocrystallization Peer-reviewed

    Xue Li, Hidemi Kato, Kunio Yubuta, Akihiro Makino, Akihisa Inoue

    JOURNAL OF NON-CRYSTALLINE SOLIDS 357 (15) 3002-3005 2011/07

    DOI: 10.1016/j.jnoncrysol.2011.04.004  

    ISSN: 0022-3093

  252. Mo microalloying effect on the glass-forming ability, magnetic, mechanical and corrosion properties of (Fe0.76Si0.096B0.084P0.06)100(-x)Mo(x) bulk glassy alloys Peer-reviewed

    Xue Li, Chunling Qin, Hidemi Kato, Akihiro Makino, Akihisa Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 509 (29) 7688-7691 2011/07

    DOI: 10.1016/j.jallcom.2011.04.081  

    ISSN: 0925-8388

  253. Cooling Process and Cast Structure of Zr-Al-Ni-Cu-Based Bulk Metallic Glasses Produced in Various Atmospheres Peer-reviewed

    J. Saida, A. D. Setyawan, H. Kato, A. Inoue

    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 42A (6) 1450-1455 2011/06

    DOI: 10.1007/s11661-010-0444-7  

    ISSN: 1073-5623

  254. Dealloying by metallic melt Peer-reviewed

    Takeshi Wada, Kunio Yubuta, Akihisa Inoue, Hidemi Kato

    Materials Letters 65 (7) 1076-1078 2011/04/15

    DOI: 10.1016/j.matlet.2011.01.054  

    ISSN: 0167-577X

  255. Thermodynamic approach to glass-forming ability of water-quenched Pd-P-based and Pt60Ni15P25 bulk metallic glasses Peer-reviewed

    O. Haruyama, T. Watanabe, K. Yuki, M. Horiuchi, H. Kato, N. Nishiyama

    PHYSICAL REVIEW B 83 (6) 064201-1-064201-9 2011/02

    DOI: 10.1103/PhysRevB.83.064201  

    ISSN: 1098-0121

  256. Static heterogeneity in metallic glasses and its correlation to physical properties Peer-reviewed

    T. Ichitsubo, H. Kato, E. Matsubara, S. Biwa, S. Hosokawa, K. Matsuda, H. Uchiyama, A. Q. R. Baron

    JOURNAL OF NON-CRYSTALLINE SOLIDS 357 (2) 494-500 2011/01

    DOI: 10.1016/j.jnoncrysol.2010.06.056  

    ISSN: 0022-3093

  257. Creep Deformation Behavior at Temperature Less than Glass Transition Temperature in Zr-Based Bulk Metallic Glass Peer-reviewed

    Kazutaka Fujita, Yuuhei Kawamura, Shinji Kimura, Hitoo Tokunaga, Yoshihiko Yokoyama, Hidemi Kato, Akihisa Inoue

    JOURNAL OF THE JAPAN INSTITUTE OF METALS 74 (9) 614-621 2010/09

    DOI: 10.2320/jinstmet.74.614  

    ISSN: 0021-4876

    eISSN: 1880-6880

  258. Plastic deformation by glassy structure control in Zr-Al-Ni-Cu-based BMGs Peer-reviewed

    J. Saida, A. D. Setyawan, H. Kato, M. Matsushita, A. Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 504 S52-S55 2010/08

    DOI: 10.1016/j.jallcom.2010.02.049  

    ISSN: 0925-8388

  259. Atomic-Scale Characterization of Elastic Deformation of Zr-Based Metallic Glass under Tensile Stress Peer-reviewed

    Shigeo Sato, Hiroshi Suzuki, Takahisa Shobu, Muneyuki Imafuku, Yoshinori Tsuchiya, Kazuaki Wagatsuma, Hidemi Kato, Albertus Deny Setyawan, Junji Saida

    MATERIALS TRANSACTIONS 51 (8) 1381-1385 2010/08

    DOI: 10.2320/matertrans.M2010052  

    ISSN: 1345-9678

    eISSN: 1347-5320

  260. In situ phase separation and flow behavior in the glass transition region Peer-reviewed

    Dmitri V. Louzguine-Luzgin, Takeshi Wada, Hidemi Kato, John Perepezko, Akihisa Inoue

    INTERMETALLICS 18 (6) 1235-1239 2010/06

    DOI: 10.1016/j.intermet.2010.03.018  

    ISSN: 0966-9795

    eISSN: 1879-0216

  261. Deformation-induced structural transformation leading to compressive plasticity in Zr65Al7.5Ni10Cu12.5M5 (M = Nb, Pd) glassy alloys Peer-reviewed

    Albertus D. Setyawan, Junji Saida, Hidemi Kato, Mitsuhide Matsushita, Akihisa Inoue

    JOURNAL OF MATERIALS RESEARCH 25 (6) 1149-1158 2010/06

    DOI: 10.1557/JMR.2010.0153  

    ISSN: 0884-2914

  262. Elastic inhomogeneity and acoustic phonons in Pd-, Pt-, and Zr-based metallic glasses Peer-reviewed

    T. Ichitsubo, W. Itaka, E. Matsubara, H. Kato, S. Biwa, S. Hosokawa, K. Matsuda, J. Saida, O. Haruyama, Y. Yokoyama, H. Uchiyama, A. Q. R. Baron

    PHYSICAL REVIEW B 81 (17) 172201 2010/05

    DOI: 10.1103/PhysRevB.81.172201  

    ISSN: 1098-0121

  263. Elastic inhomogeneity and acoustic phonons in Pd-, Pt-, and Zr-based metallic glasses Peer-reviewed

    T. Ichitsubo, W. Itaka, E. Matsubara, H. Kato, S. Biwa, S. Hosokawa, K. Matsuda, J. Saida, O. Haruyama, Y. Yokoyama, H. Uchiyama, AQR. Bron

    Phys. Rev. B 81 (17) 172201-1-172201-4 2010/05/01

    DOI: 10.1103/PhysRevB.81.17220  

  264. Vogel-Fulcher-Tammann plot for viscosity scaled with temperature interval between actual and ideal glass transitions for metallic glasses in liquid and supercooled liquid states Peer-reviewed

    A. Takeuchi, H. Kato, A. Inoue

    INTERMETALLICS 18 (4) 406-411 2010/04

    DOI: 10.1016/j.intermet.2009.08.015  

    ISSN: 0966-9795

  265. Effect of Cu on nanocrystallization and plastic properties of FeSiBPCu bulk metallic glasses Peer-reviewed

    Xue Li, Hidemi Kato, Kunio Yubuta, Akihiro Makino, Akihisa Inoue

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 527 (10-11) 2598-2602 2010/04

    DOI: 10.1016/j.msea.2009.12.026  

    ISSN: 0921-5093

  266. Symmetry and Periodicity in Al75(Co1-xPdx)25 Decagonal Quasicrystal Phase Peer-reviewed

    K. Yubuta, H. Kato, K. Hiraga

    J. Flux Growth 5 63-65 2010

  267. Comparing the origin of ductility in the Zr-Al-Ni-Cu-M (M = Nb, Pd) metallic glasses Peer-reviewed

    Setyawan, A.D., Saida, J., Kato, H., Matsushita, M., Inoue, A.

    Intermetallics 18 (10) 1881-1888 2010

    DOI: 10.1016/j.intermet.2010.02.041  

    ISSN: 0966-9795

  268. Tailoring Thermally Induced Nano-Quasicrystallization and Deformation-Assisted Nanocrystallization for Mechanical Property Improvement in Zr-Al-Ni-Cu-Pd Bulk Metallic Glasses Peer-reviewed

    Junji Saida, Albertus D. Setyawan, Hidemi Kato, Mitsuhide Matsushita, Akihisa Inoue

    MATERIALS TRANSACTIONS 50 (8) 2079-2086 2009/08

    DOI: 10.2320/matertrans.M2009135  

    ISSN: 1345-9678

    eISSN: 1347-5320

  269. Heating rate dependence of T-g and T-x in Zr-based BMGs with characteristic structures Peer-reviewed

    E. Matsubara, T. Ichitsubo, K. Itoh, T. Fukunaga, J. Saida, N. Nishiyama, H. Kato, A. Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 483 (1-2) 8-13 2009/08

    DOI: 10.1016/j.jallcom.2008.07.225  

    ISSN: 0925-8388

  270. Temperature dependence of the yield strain of a Zr-based metallic glass at the glassy state Peer-reviewed

    Hidemi Kato, Hitoshi Igarashi, Akihisa Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 483 (1-2) 150-153 2009/08

    DOI: 10.1016/j.jallcom.2008.07.192  

    ISSN: 0925-8388

  271. Nanostructure controlling in Zr-based metallic glasses using icosahedral local structure Peer-reviewed

    J. Saida, H. Kato, A. D. Setyawan, K. Yoshimi, A. Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 483 (1-2) 231-234 2009/08

    DOI: 10.1016/j.jallcom.2008.07.182  

    ISSN: 0925-8388

  272. Mechanical Properties of Soft Magnetic (Fe0.76Si0.096B0.084P0.06)(100-x)Cu-x (x=0 and 0.1) Bulk Glassy Alloys Peer-reviewed

    Xue Li, Akihiro Makino, Kunio Yubuta, Hidemi Kato, Akihisa Inoue

    MATERIALS TRANSACTIONS 50 (6) 1286-1289 2009/06

    DOI: 10.2320/matertrans.ME200833  

    ISSN: 1345-9678

    eISSN: 1347-5320

  273. Evaluation of residual stress and deformation behavior on Zr55Al10Ni5Cu30 bulk metallic glass containing ZrC particles using neutron diffraction

    Suzuki, H., Saida, J., Kato, H., Setyawan, A.D., Imafuku, M.

    Scripta Materialia 60 (8) 725-728 2009/04/01

    DOI: 10.1016/j.scriptamat.2009.01.009  

    ISSN: 1359-6462

  274. Fabrication and soft-magnetic properties of Fe-B-Nb-Y glassy powder compacts by spark plasma sintering technique Peer-reviewed

    Sangmin Lee, Hidemi Kato, Takeshi Kubota, Akihiro Makino, Akihisa Inoue

    INTERMETALLICS 17 (4) 218-221 2009/04

    DOI: 10.1016/j.intermet.2008.07.021  

    ISSN: 0966-9795

  275. Displacement Behavior Study of the Shear Stress Effect on the Early Viscous Flow Nature of Fe-B-Nb-Y Metallic Glassy Powder in Spark Plasma Sintering Peer-reviewed

    Sangmin Lee, Hidemi Kato, Akihiro Makino, Akihisa Inoue

    MATERIALS TRANSACTIONS 50 (3) 490-493 2009/03

    DOI: 10.2320/matertrans.MBW200851  

    ISSN: 1345-9678

    eISSN: 1347-5320

  276. Correlation of dynamic and quasistatic relaxations: The Cox-Merz rule for metallic glass Peer-reviewed

    Hidemi Kato, Tetsu Ichitsubo, Hitoshi Igarashi, Akihisa Inoue

    Applied Physics Letters 95 (23) 231911 2009

    DOI: 10.1063/1.3272922  

    ISSN: 0003-6951

  277. Improvement of Plasticity in Pd Containing Zr-Al-Ni-Cu Bulk Metallic Glass by Deformation-Induced Nano Structure Change Peer-reviewed

    Junji Saida, Albertus Deny Setyawan, Hidemi Kato, Mitsuhide Matsushita, Akihisa Inoue

    MATERIALS TRANSACTIONS 49 (11) 2732-2736 2008/11

    DOI: 10.2320/matertrans.MER2008162  

    ISSN: 1345-9678

    eISSN: 1347-5320

  278. 金属ガラス粉末のホットプレス緻密化制御 Peer-reviewed

    渡辺龍三, 吉年規治, 加藤秀実, 川崎亮

    粉体および粉末冶金 55 (10) 709-714 2008/10

    Publisher: Japan Society of Powder and Powder Metallurgy

    DOI: 10.2497/jjspm.55.709  

    ISSN: 0532-8799

    More details Close

    The equations for the densification control by viscous flow in the hot pressing of metallic glass powders are derived and a criterion for the full densification thereof and an approach for the porosity control are proposed. The kinetic equations are derived on the basis of Arzt's hot pressing theory; in which the densification is modeled by the contraction of the Bolonoi cell of the random dense packing of spherical particles. The constitutive equation for the viscous flow is obtained from the hitherto proposed creep rate equation setting the rate exponent to be unity. The hypothetical constraint for the deformation due to the three grain edges formed in the later stage of densification is taken into account as a modification of the pressure term in the kinetic equations. The relative density is expressed as functions of hot pressing time and the ratio of the viscosity and the pressure. It is shown that the time required for full densification of metallic glass powders depends only on the viscosity/pressure ratio. The criterion for the full densification is expressed as a straight line on the time-viscosity/pressure ratio plane, which divides the area into full-dense and porous areas. The porosity control of the metallic glass powder compacts is also demonstrated as another practical application of the present theory. The results are discussed on the basis of the reported data.

  279. High specific strength Mg-based bulk metallic glass matrix composite highly ductilized by Ti dispersoid Peer-reviewed

    Makoto Kinaka, Hidemi Kato, Masashi Hasegawa, Akihisa Inoue

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 494 (1-2) 299-303 2008/10

    DOI: 10.1016/j.msea.2008.04.039  

    ISSN: 0921-5093

  280. Free-volume-induced enhancement of plasticity in a monolithic bulk metallic glass at room temperature Peer-reviewed

    L. Y. Chen, A. D. Setyawan, H. Kato, A. Inoue, G. Q. Zhang, J. Saida, X. D. Wang, Q. P. Cao, J. Z. Jiang

    SCRIPTA MATERIALIA 59 (1) 75-78 2008/07

    DOI: 10.1016/j.scriptamat.2008.02.025  

    ISSN: 1359-6462

  281. Formation of Zr66.7Al11.1Ni22.2 noncrystalline alloys demonstrated by molecular dynamics simulations based on distorted plastic crystal model Peer-reviewed

    A. Takeuchi, Y. Yokoyama, H. Kato, K. Yubuta, A. Inoue

    INTERMETALLICS 16 (6) 819-826 2008/06

    DOI: 10.1016/j.intermet.2008.03.004  

    ISSN: 0966-9795

  282. Relationship between thermal expansion coefficient and glass transition temperature in metallic glasses Peer-reviewed

    H. Kato, H. -S. Chen, A. Inoue

    SCRIPTA MATERIALIA 58 (12) 1106-1109 2008/06

    DOI: 10.1016/j.scriptamat.2008.02.006  

    ISSN: 1359-6462

  283. Another clue to understand the yield phenomenon at the glassy state in a Zr55Al10Ni5Cu30 metallic glass Peer-reviewed

    Hidemi Kato, Hitoshi Igarashi, Akihisa Inoue

    MATERIALS LETTERS 62 (10-11) 1592-1594 2008/04

    DOI: 10.1016/j.matlet.2007.09.030  

    ISSN: 0167-577X

  284. Excellent thermal stability and bulk glass forming ability of Fe-B-Nb-Y soft magnetic metallic glass Peer-reviewed

    Sangmin Lee, Hidemi Kato, Takeshi Kubota, Kunio Yubuta, Akihiro Makino, Akihisa Inoue

    MATERIALS TRANSACTIONS 49 (3) 506-512 2008/03

    DOI: 10.2320/matertrans.MBW200732  

    ISSN: 1345-9678

    eISSN: 1347-5320

  285. Glass formation dependence on casting-atmosphere pressure in Zr(65)Al(7.5)Ni(10)Cu(17.5-x)Pd(x) (x=0-17.5) alloy system: A resultant effect of quasicrystalline phase transformation and cooling mechanism during mold-casting process Peer-reviewed

    Albertus D. Setyawan, Hidemi Kato, Junji Saida, Akihisa Inoue

    JOURNAL OF APPLIED PHYSICS 103 (4) 044907-044907 2008/02

    DOI: 10.1063/1.2844327  

    ISSN: 0021-8979

  286. Phase transformation behaviour in continuously cooled Zr65Al7.5Ni10Cu17.5-xPdx (x=0-17.5) glass-forming alloys and consequences for structure and property control Peer-reviewed

    A. D. Setyawan, H. Kato, J. Saida, A. Inoue

    PHILOSOPHICAL MAGAZINE 88 (8) 1125-1136 2008

    DOI: 10.1080/14786430801958380  

    ISSN: 1478-6435

  287. Structure and deformation behavior of high strength hypereutectic Ti-based alloys Invited Peer-reviewed

    Dmitri V. Louzguine-Luzgin, Larissa V. Louzguina-Luzgina, Hidemi Kato, Akihisa Inoue

    Proceedings of the 11th World Conference on Titanium, June 3-7 2007 Kyoto 733-736 2007/12/20

  288. Softening and heating behaviors during the nonlinear viscous flow in a Zr-based bulk metallic glass Peer-reviewed

    Hidemi Kato, Akihisa Inoue, H. S. Chen

    JOURNAL OF NON-CRYSTALLINE SOLIDS 353 (32-40) 3764-3768 2007/10

    DOI: 10.1016/j.jnonerysol.2007.05.144  

    ISSN: 0022-3093

  289. Low-temperature acoustic properties and quasiharmonic analysis for Cu-based bulk metallic glasses Peer-reviewed

    R. Tarumi, M. Hirao, T. Ichitsubo, E. Matsubara, J. Saida, H. Kato

    Physical Review B - Condensed Matter and Materials Physics 76 (10) 2007/09/28

    DOI: 10.1103/PhysRevB.76.104206  

    ISSN: 1098-0121 1550-235X

  290. Low-temperature acoustic properties and quasiharmonic analysis for Cu-based bulk metallic glasses Peer-reviewed

    R. Tarumi, M. Hirao, T. Ichitsubo, E. Matsubara, J. Saida, H. Kato

    PHYSICAL REVIEW B 76 (10) 104206 2007/09

    DOI: 10.1103/PhysRevB.76.104206  

    ISSN: 2469-9950

    eISSN: 2469-9969

  291. Mechanical property and corrosion resistance evaluations of Ti-6Al-7Nb alloy brazed with bulk metallic glasses Peer-reviewed

    Miura, E, Kato, H, Ogata, T, Nishiyama, N, Specht, ED, Shiraishi, T, Inoue, A, Hisatsune, K

    Mater. Trans. 48 (8) 2235-2243 2007/08

    Publisher:

    DOI: 10.2320/matertrans.MER2007612  

    ISSN: 1345-9678

  292. Low temperature elastic properties of CuZrTi bulk metallic glass Peer-reviewed

    R. Tarumi, M. Hirao, T. Ichitsubo, E. Matsubara, J. Saida, H. Kato

    MATERIALS TRANSACTIONS 48 (7) 1842-1845 2007/07

    DOI: 10.2320/matertrans.MJ200764  

    ISSN: 1345-9678

    eISSN: 1347-5320

  293. Voronoi analysis of the structure of Ni-Zr-Al ternary metallic glass Peer-reviewed

    T. Fukunaga, K. Itoh, T. Otomo, K. Mori, A. Sugiyama, H. Kato, A. Hasegawa, A. Hirata, Y. Hirotsu, A. C. Hannon

    MATERIALS TRANSACTIONS 48 (7) 1698-1702 2007/07

    DOI: 10.2320/matertrans.MJ200750  

    ISSN: 1345-9678

    eISSN: 1347-5320

  294. Deformation-induced nanoscale dynamic transformation studies in Zr-Al-Ni-pd and Zr-Al-Ni-Cu bulk metallic glasses Peer-reviewed

    Junji Saida, Hidemi Kato, Albertus Deny Heri Setyawan, Kyosuke Yoshimi, Akihisa Inoue

    MATERIALS TRANSACTIONS 48 (6) 1327-1335 2007/06

    DOI: 10.2320/matertrans.MF200615  

    ISSN: 1345-9678

    eISSN: 1347-5320

  295. Origin of the effect of the gas atmosphere during mold-casting Zr65Al7.5Ni10Pd17.5 bulk glassy or nano-quasicrystal-forming alloy Peer-reviewed

    Albertus Deny Setyawan, Hidemi Kato, Junji Saida, Akihisa Inoue

    MATERIALS TRANSACTIONS 48 (6) 1266-1271 2007/06

    DOI: 10.2320/matertrans.MF200619  

    ISSN: 1345-9678

    eISSN: 1347-5320

  296. Internal friction induced by interstitial atoms in multicomponent glassy alloy and composite Peer-reviewed

    M. Hasegawa, M. Takeuchi, D. Nagata, T. Wada, H. Kato, S. Yamaura, A. Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 434 196-198 2007/05

    DOI: 10.1016/j.jallcom.2006.08.268  

    ISSN: 0925-8388

  297. Investigation of high strength metastable hypereutectic ternary Ti-Fe-Co and quaternary Ti-Fe-Co-(V, Sn) alloys Peer-reviewed

    Drnitri V. Louzguine-Luzgin, Larissa V. Louzguina-Luzgina, Hidemi Kato, Akihisa Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 434 32-35 2007/05

    DOI: 10.1016/j.jallcom.2006.08.335  

    ISSN: 0925-8388

  298. Joining of Zr-based bulk metallic glasses using the friction welding method Peer-reviewed

    Hyung-Seop Shin, Young-Jin Jeong, Ho-Yeon Choi, Hiderni Kato, Akihisa Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 434 102-105 2007/05

    DOI: 10.1016/j.jallcom.2006.08.129  

    ISSN: 0925-8388

  299. Stability and electronic structure of Zr-based ternary metallic glasses and relevant compounds Peer-reviewed

    M. Hasegawa, K. Soda, H. Sato, T. Suzuki, T. Taketomi, T. Takeuchi, H. Kato, U. Mizutani

    JOURNAL OF ALLOYS AND COMPOUNDS 434 149-151 2007/05

    DOI: 10.1016/j.jallcom.2006.08.277  

    ISSN: 0925-8388

  300. Deformation behavior of Zr- and Ni-based bulk glassy alloys Peer-reviewed

    Dmitri V. Louzguine-Luzgin, Yuqiao Zeng, Albertus Deny, Heri Setyawan, Nobuyuki Nishiyama, Hidemi Kato, Junji Saida

    JOURNAL OF MATERIALS RESEARCH 22 (4) 1087-1092 2007/04

    DOI: 10.1557/JMR.2007.0126  

    ISSN: 0884-2914

  301. Evidence for effect of hydrostatic pressure during casting on glass-forming ability in Zr65Al7.5Ni10Cu17.5-xPdx (x = 0-17.5) alloys Peer-reviewed

    A. D. Setyawan, H. Kato, J. Saida, A. Inoue

    Materials Science and Engineering A 448-451 903-906 2007/03/25

    DOI: 10.1016/j.msea.2006.02.386  

    ISSN: 0921-5093

  302. X-ray study of Pd40Cu30Ni10P20 bulk metallic glass brazing filler for Ti-6Al-7Nb alloy

    Miura, E., Ice, G.E., Specht, E.D., Pang, J.W.L., Kato, H., Hisatsune, K., Inoue, I.

    Materials Science Forum 539-543 (PART 2) 2007

    Publisher: Materials Science Forum

    DOI: 10.4028/0-87849-428-6.1983  

    ISSN: 1662-9752 0255-5476

  303. Effect of Nd-rich phase on c-axis orientation of Nd-Fe-B melt-spun magnet and its domain structure

    Takezawa, M., Aiba, K., Yasuda, H., Morimoto, Y., Hidaka, T., Yamasaki, J., Kato, H., Yagi, M.

    Journal of Magnetism and Magnetic Materials 310 (2 SUPPL. PART 3) 2007

    DOI: 10.1016/j.jmmm.2006.10.1072  

    ISSN: 0304-8853

  304. Microstructure of rapidly solidified Co-Sn-Ti and Co-Sn-Si alloys Peer-reviewed

    Fujisawa, S., Yoshimi, K., Kato, H., Maruyama, K.

    Materials Science Forum 561-565 (PART 2) 1357-1360 2007

    Publisher: Materials Science Forum

    DOI: 10.4028/0-87849-462-6.1357  

    ISSN: 1662-9752 0255-5476

  305. Thermal conductivity of an alloy in relation to the observed cooling rate and glass-forming ability Peer-reviewed

    D. V. Louzguine-Luzgin, A. D. Setyawan, H. Kato, A. Inoue

    PHILOSOPHICAL MAGAZINE 87 (12) 1845-1854 2007

    DOI: 10.1080/14786430601096928  

    ISSN: 1478-6435

  306. Topological characterization of metallic glasses by neutron diffraction and RMC modeling Peer-reviewed

    Fukunaga, T., Itoh, K., Otomo, T., Mori, K., Sugiyama, M., Kato, H., Hasegawa, M., Hirata, A., Hirotsu, Y., Aoki, K.

    Physica B: Condensed Matter 385-386 I 259-262 2006/11/15

    DOI: 10.1016/j.physb.2006.05.061  

    ISSN: 0921-4526

  307. Voronoi analysis of the structure of Cu-Zr and Ni-Zr metallic glasses Peer-reviewed

    T. Fukunaga, K. Itoh, T. Otomo, K. Mori, M. Sugiyama, H. Kato, M. Hasegawa, A. Hirata, Y. Hirotsu, A. C. Hannon

    INTERMETALLICS 14 (8-9) 893-897 2006/08

    DOI: 10.1016/j.intermet.2006.01.006  

    ISSN: 0966-9795

    eISSN: 1879-0216

  308. Influence of thermal conductivity on the glass-forming ability of Ni-based and Cu-based alloys Peer-reviewed

    Dmitri V. Louzguine-Luzgin, Albertus Deny Setyawan, Hidemi Kato, Akihisa Inoue

    Applied Physics Letters 88 (25) 251902 2006/06/19

    DOI: 10.1063/1.2213967  

    ISSN: 0003-6951

  309. Fragility and thermal stability of Pt- and Pd-based bulk glass forming liquids and their correlation with deformability Peer-reviewed

    H Kato, T Wada, M Hasegawa, J Saida, A Inoue, HS Chen

    SCRIPTA MATERIALIA 54 (12) 2023-2027 2006/06

    DOI: 10.1016/j.scriptamat.2006.03.025  

    ISSN: 1359-6462

  310. On structural relaxation and viscous work heating during non-Newtonian viscous flow in a Zr55Al10Ni5Cu30 bulk metallic glass Peer-reviewed

    H Kato, A Inoue, HS Chen

    ACTA MATERIALIA 54 (4) 891-898 2006/02

    DOI: 10.1016/j.actamat.2005.10.024  

    ISSN: 1359-6454

  311. Internal friction and mechanical strength of hydrogenated Ti-rich multicomponent glassy alloys Peer-reviewed

    M. Hasegawa, M. Takeuchi, D. Nagata, T. Wada, H. Kato, S. Yamaura, A. Inoue

    HIGH DAMPING MATERIALS II 319 139-143 2006

    DOI: 10.4028/0-87849-406-5.139  

    ISSN: 1013-9826

  312. Comparative study on glassy phase stabilities of Zr-Co-Al and Zr-Ni-Al metallic glasses Peer-reviewed

    M Hasegawa, T Taketomi, H Kato, T Takeuchi, U Mizutani, A Inoue

    MATERIALS TRANSACTIONS 46 (12) 2785-2790 2005/12

    DOI: 10.2320/matertrans.46.2785  

    ISSN: 1345-9678

    eISSN: 1347-5320

  313. Characteristics of shear bands and fracture surfaces of Zr65Al7.5Ni10Pd17.5 bulk metallic glass Peer-reviewed

    K Yoshimi, H Kato, J Saida, A Inoue

    MATERIALS TRANSACTIONS 46 (12) 2870-2874 2005/12

    DOI: 10.2320/matertrans.46.2870  

    ISSN: 1345-9678

    eISSN: 1347-5320

  314. Friction welding of Zr55Al10Ni5Cu30 bulk metallic glasses Peer-reviewed

    HS Shin, YJ Jeong, HY Choi, H Kato, A Inoue

    MATERIALS TRANSACTIONS 46 (12) 2768-2772 2005/12

    DOI: 10.2320/matertrans.46.2768  

    ISSN: 1345-9678

    eISSN: 1347-5320

  315. Nanoscale multistep shear band formation by deformation-induced nanocrystallization in Zr-Al-Ni-Pd bulk metallic glass Peer-reviewed

    J Saida, ADH Setyawan, H Kato, A Inoue

    APPLIED PHYSICS LETTERS 87 (15) 151907 2005/10

    DOI: 10.1063/1.2081124  

    ISSN: 0003-6951

  316. Characterization and properties of nanocrystal-forming Zr-based bulk metallic glasses Invited Peer-reviewed

    J Saida, H Kato, ADH Setyawan, A Inoue

    REVIEWS ON ADVANCED MATERIALS SCIENCE 10 (1) 34-38 2005/08

    ISSN: 1606-5131

  317. Vacancy clustering and relaxation behavior in rapidly solidified B2FeAl ribbons Peer-reviewed

    T Haraguchi, K Yoshimi, MH Yoo, H Kato, S Hanada, A Inoue

    ACTA MATERIALIA 53 (13) 3751-3764 2005/08

    DOI: 10.1016/j.actamat.2005.04.027  

    ISSN: 1359-6454

  318. Excellent creep properties of Mg-Zn-Cu-Gd-based alloy strengthened by quasicrystals and Laves phases Peer-reviewed

    GY Yuan, H Kato, K Amiya, A Inoue

    JOURNAL OF MATERIALS RESEARCH 20 (5) 1278-1286 2005/05

    DOI: 10.1557/JMR.2005.0156  

    ISSN: 0884-2914

  319. Cu-Hf-Ti-Ag-Ta bulk metallic glass composites and their properties Peer-reviewed

    Zan Bian, Hidemi Kato, Chunling Qin, Wei Zhang, Akihisa Inoue

    Acta Materialia 53 (7) 2037-2048 2005/04

    DOI: 10.1016/j.actamat.2005.01.015  

    ISSN: 1359-6454

  320. Investigation of Ti-Fe-Co bulk alloys with high strength and enhanced ductility Peer-reviewed

    DV Louzguine-Luzgin, LV Louzguina-Luzgina, H Kato, A Inoue

    ACTA MATERIALIA 53 (7) 2009-2017 2005/04

    DOI: 10.1016/j.actamat.2005.01.012  

    ISSN: 1359-6454

  321. Primary precipitation of icosahedral quasicrystal with rearrangement of constitutional elements in Zr65Al7.5 Cu27.5 glassy alloy with low oxygen impurity Peer-reviewed

    Junji Saida, Hidemi Kato, A. Inoue

    Journal of Materials Research 20 (2) 303-306 2005/02

    DOI: 10.1557/JMR.2005.0058  

    ISSN: 0884-2914

  322. Non-equilibrium Ti-Fe bulk alloys with ultra-high strength and enhanced ductility

    Dmitri V. Louzguine-Luzgin, Larissa V. Louzguina-Luzgina, Hidemi Kato, Akihisa Inoue

    Materials Research Society Symposium Proceedings 851 227-232 2005

    ISSN: 0272-9172

  323. Deformation behavior of a Zr55AI10Ni 5Cu30 bulk metallic glass at high temperatures Peer-reviewed

    H. S. Shin, Y. J. Jung, K. H. Kim, J. H. Ann, H. Kato, A. Inoue

    Journal of Metastable and Nanocrystalline Materials 24-25 359-362 2005

    DOI: 10.4028/www.scientific.net/JMNM.24-25.359  

    ISSN: 1422-6375

  324. Structural observation and RMC modeling for Ni-Zr and Cu-Zr metallic glasses Peer-reviewed

    T. Fukunaga, D. Touya, K. Itoh, T. Otomo, K. Mori, H. Kato, M. Hasegawa

    Journal of Metastable and Nanocrystalline Materials 24-25 217-220 2005

    DOI: 10.4028/www.scientific.net/JMNM.24-25.217  

  325. Structure of Cu-Zr and Ni-Zr Metallic Glasses and RMC Modeling Peer-reviewed

    T. Fukunaga, K. Itoh, T. Otomo, K. Mori, M. Sugiyama, H. Kato, M. Hasegawa, A. Hirata, Y. Hirotsu

    J. Intermetallics\n 0-0 2005

  326. High mechanical properties of cast quasicrystal-reinforced Mg-alloys Peer-reviewed

    GY Yuan, WJ Ding, K Amiya, H Kato, A Inoue

    MAGNESIUM - SCIENCE, TECHNOLOGY AND APPLICATIONS 488-489 127-130 2005

    ISSN: 0255-5476

  327. Novel nanostructure and deformcifion behavior in rapidly quenched Cu-(Zr or Hf)-Ti alloys Peer-reviewed

    J Saida, H Kato, A Inoue, M Ohnurna

    ADVANCED ENGINEERING MATERIALS 7 (1-2) 39-43 2005/01

    DOI: 10.1002/adem.200400160  

    ISSN: 1438-1656

    eISSN: 1527-2648

  328. High strength Cu-based crystal-glassy composite with enhanced ductility Peer-reviewed

    D. V. Louzguine, H. Kato, A. Inoue

    Appl. Phys. Lett. 84 (7) 1088-1090 2004/12/31

    Publisher: American Institute of Physics

    DOI: 10.1063/1.1647278  

    ISSN: 0003-6951

  329. Fictive stress model calculations of viscoelastic behaviors in a Zr-based glassy alloy Peer-reviewed

    Kato, H., Inoue, A., Chen, H.S.

    Strength, Fracture and Complexity 2 (1) 21-33 2004/12/31

    ISSN: 1567-2069

  330. Novel Nanoctructure and deformation behavior in rapidly quenched Cu-(Zr or Hf)-Ti Alloys Peer-reviewed

    J. Saida, H. Kato, A. Inoue, M. Ohnuma

    J. Sci. Adv. Eng. Mater. 62 000 2004/12/31

  331. バルク金属ガラスの変形と破壊

    加藤秀実, 井上明久

    第49回材料強度と破壊総合シンポジウム論文集 49 351-341 2004/12/31

  332. High-strength binary Ti-Fe bulk alloys with enhanced ductility Peer-reviewed

    DV Louzguine, H Kato, LV Louzguina, A Inoue

    JOURNAL OF MATERIALS RESEARCH 19 (12) 3600-3606 2004/12

    DOI: 10.1557/JMR.2004.0462  

    ISSN: 0884-2914

  333. A fictive stress model calculation of creep deformation of Zr-based bulk metallic glass in the glass transition region under a constant load Peer-reviewed

    H Kato, A Inoue, HS Chen

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 43 (12) 8185-8189 2004/12

    DOI: 10.1143/JJAP.43.8185  

    ISSN: 0021-4922

  334. Influence of hydrostatic pressure during casting on as cast structure and mechanical properties in Zr65Al7.5Ni10Cu 17.5-xPdx (x = 0, 17.5) alloys Peer-reviewed

    Hidemi Kato, Junji Saida, Akihisa Inoue

    Scripta Materialia 51 (11) 1063-1068 2004/11

    DOI: 10.1016/j.scriptamat.2004.08.004  

    ISSN: 1359-6462

  335. Influence of nanoprecipitation on strength of Cu60Zr30Ti10 glass containing mu m-ZrC particle reinforcements Peer-reviewed

    H Kato, K Yubuta, DV Louzguine, A Inoue, HS Kim

    SCRIPTA MATERIALIA 51 (6) 577-581 2004/09

    DOI: 10.1016/j.scriptamat.2004.05.033  

    ISSN: 1359-6462

  336. Influences of hydrostatic pressure during casting and Pd content on as-cast phase in Zr-Al-Ni-Cu-Pd bulk alloys Peer-reviewed

    H Kato, A Inoue, J Saida

    APPLIED PHYSICS LETTERS 85 (12) 2205-2207 2004/09

    DOI: 10.1063/1.1790028  

    ISSN: 0003-6951

  337. Finite element analysis of compressive deformation of bulk metallic glasses Peer-reviewed

    HS Kim, H Kato, A Inoue, HS Chen

    ACTA MATERIALIA 52 (13) 3813-3823 2004/08

    DOI: 10.1016/j.actamat.2004.04.031  

    ISSN: 1359-6454

  338. Heat of evolution and structural analysis on the non-Newtonian viscous flow of Pd40Ni40P20 glassy alloy Peer-reviewed

    H Kato, E Matsubara, A Inoue, N Nishiyama, HS Chen

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 375 444-448 2004/07

    DOI: 10.1016/j.msea.2003.10.096  

    ISSN: 0921-5093

  339. High strength and ductile bulk Ti-Ni-Cu-Nb alloy with submicron-size structure units obtained by arc-melting Peer-reviewed

    DV Louzguine, H Kato, A Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 375 (1-2) 171-174 2004/07

    DOI: 10.1016/j.jallcom.2003.11.134  

    ISSN: 0925-8388

  340. Stability and hydrogen-induced internal friction of Ti-rich multicomponent glassy alloys Peer-reviewed

    M. Hasegawa, M. Takeuchi, H. Kato, S. Yamaura, A. Inoue

    Journal of Alloys and Compounds 372 (1-2) 116-120 2004/06/09

    DOI: 10.1016/j.jallcom.2003.09.135  

    ISSN: 0925-8388

  341. High-strength hypereutectic Ti-Fe-Co bulk alloy with good ductility Peer-reviewed

    DV Louzguine, H Kato, A Inoue

    PHILOSOPHICAL MAGAZINE LETTERS 84 (6) 359-364 2004/06

    DOI: 10.1080/09500830410001728336  

    ISSN: 0950-0839

  342. Structure and mechanical properties of cast quasicrystal-reinforced Mg-Zn-Al-Y base alloys Peer-reviewed

    GY Yuan, K Amiya, H Kato, A Inoue

    JOURNAL OF MATERIALS RESEARCH 19 (5) 1531-1538 2004/05

    DOI: 10.1557/JMR.2004.0205  

    ISSN: 0884-2914

    eISSN: 2044-5326

  343. Ultra-high strength above 5000 MPa and soft magnetic properties of Co-Fe-Ta-B bulk glassy alloys Peer-reviewed

    A Inoue, BL Shen, H Koshiba, H Kato, AR Yavari

    ACTA MATERIALIA 52 (6) 1631-1637 2004/04

    DOI: 10.1016/j.actamat.2003.12.008  

    ISSN: 1359-6454

  344. Mechanical properties and fracture characteristics of Zr-based bulk metallic glass composites containing carbon nanotube addition Peer-reviewed

    Z Bian, T Zhang, H Kato, M Hasegawa, A Inoue

    JOURNAL OF MATERIALS RESEARCH 19 (4) 1068-1076 2004/04

    DOI: 10.1557/JMR.2004.0140  

    ISSN: 0884-2914

  345. Effects of a small amount of Si or Ge addition on stability and hydrogen-induced internal friction of Ti34Zr11CU47Ni8 glassy alloys Peer-reviewed

    M Hasegawa, M Takeuchi, H Kato, A Inoue

    ACTA MATERIALIA 52 (7) 1799-1806 2004/04

    DOI: 10.1016/j.actamat.2003.12.019  

    ISSN: 1359-6454

  346. Microforming of bulk metallic glasses: Constitutive modelling and applications Peer-reviewed

    Hyoung Seop Kim, Hidemi Kato, Akihisa Inoue, Ho-Sou Chen, Sun Ig Hong

    Materials Transactions 45 (4) 1228-1232 2004/04

    DOI: 10.2320/matertrans.45.1228  

    ISSN: 1345-9678

  347. Hydrogen-induced internal friction of Zr-based bulk glassy alloys in a rod shape above 90 K Peer-reviewed

    M Hasegawa, K Kotani, S Yamaura, H Kato, Kodama, I, A Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 365 (1-2) 221-227 2004/02

    DOI: 10.1016/S0925-8388(03)00686-8  

    ISSN: 0925-8388

  348. Influence of in-situ nanoprecipitation on constant load deformation in the glass transition region of a Cu60Zr30Ti10 bulk metallic glass Peer-reviewed

    Hidemi Kato, Dmitri V. Louzguine, Akihisa Inoue, Hyoung Seop Kim, Ho-Sou Chen

    Materials Transactions 45 (7) 2383-2388 2004

    Publisher: Japan Institute of Metals (JIM)

    DOI: 10.2320/matertrans.45.2383  

    ISSN: 1345-9678

  349. Heating and structural disordering effects of the nonlinear viscous flow in a Zr55Al10Ni5Cu30 bulk metallic glass Peer-reviewed

    H Kato, A Inoue, HS Chen

    AMORPHOUS AND NANOCRYSTALLINE METALS 806 251-256 2004

    ISSN: 0272-9172

  350. Investigation of mechanical properties and devitrification of Cu-based bulk glass formers alloyed with noble metals Peer-reviewed

    Louzguine, D.V., Kato, H., Inoue, A.

    Science and Technology of Advanced Materials 4 (4) 327 2003/12/31

    DOI: 10.1016/j.stam.2003.09.003  

    ISSN: 1468-6996

  351. Is Cu60Zr30Ti10 a Bulk Glass Former? Peer-reviewed

    J. Z. Jiang, J. Saida, H. Kato, T. Ohsuna, A. Inoue

    Appl. Phys. Lett. 82 (23) 4041-4043 2003/12/31

    Publisher: American Institute of Physics

    DOI: 10.1063/1.1581001  

    ISSN: 0003-6951

  352. 非ニュートン粘性流動のHeating とStructural Disordering効果

    加藤秀実, 井上明久, H. S. Chen

    第47回日本学術会議材料研究連合講演会講演論文集 127-128 2003/12/31

  353. Heating and structural disordering effects of the nonlinear viscous flow in a Zr55Al10Ni5Cu30 bulk metallic glass Peer-reviewed

    H Kato, A Inoue, HS Chen

    APPLIED PHYSICS LETTERS 83 (26) 5401-5403 2003/12

    DOI: 10.1063/1.1637441  

    ISSN: 0003-6951

  354. Origin of nondetectable x-ray diffraction peaks in nanocomposite CuTiZr alloys Peer-reviewed

    JZ Jiang, H Kato, T Ohsuna, J Saida, A Inoue, K Saksl, H Franz, K Stahl

    APPLIED PHYSICS LETTERS 83 (16) 3299-3301 2003/10

    DOI: 10.1063/1.1619220  

    ISSN: 0003-6951

  355. In situ observation of stress-induced structural disorder and fictive stress in a Zr55Al10Ni5Cu30 glassy alloy Peer-reviewed

    HS Chen, H Kato, A Inoue

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 42 (10) 6504-6507 2003/10

    DOI: 10.1143/JJAP.42.6504  

    ISSN: 0021-4922

  356. Cobalt-based bulk glassy alloy with ultrahigh strength and soft magnetic properties Peer-reviewed

    A Inoue, BL Shen, H Koshiba, H Kato, AR Yavari

    NATURE MATERIALS 2 (10) 661-663 2003/10

    DOI: 10.1038/nmat982  

    ISSN: 1476-1122

  357. Formation of 2-5 nm size pre-precipitates of cF96 phase in a Hf-Co-Al glassy alloy Peer-reviewed

    DV Louzguine, H Kato, HS Kim, A Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 359 198-201 2003/09

    DOI: 10.1016/S0925-8388(03)00292-5  

    ISSN: 0925-8388

  358. Determination of density and vacancy concentration in rapidly solidified FeAl ribbons Peer-reviewed

    T Haraguchi, K Yoshimi, H Kato, S Hanada, A Inoue

    INTERMETALLICS 11 (7) 707-711 2003/07

    DOI: 10.1016/S0966-9795(03)00066-9  

    ISSN: 0966-9795

  359. Damping properties of hydrogen-absorbed rod metallic glasses Peer-reviewed

    M Hasegawa, S Yamaura, H Kato, K Amiya, N Nishiyama, A Inoue

    JOURNAL OF ALLOYS AND COMPOUNDS 355 (1-2) 37-41 2003/06

    DOI: 10.1016/S0925-8388(03)00263-9  

    ISSN: 0925-8388

  360. Nanopore formation in B2 iron aluminide by vacancy clustering Peer-reviewed

    T Haraguchi, K Yoshimi, H Kato, S Hanada, A Inoue

    SURFACE ENGINEERING: IN MATERIALS SCIENCE II 111-120 2003

  361. Effect of mu m-ZrC dispersoids and nanoprecipitates on mechanical properties of CuZrTi bulk glasses Peer-reviewed

    H Kato, DV Louzguine, A Inoue, HS Kim, SI Hong

    METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS 15-16 161-166 2003

  362. Strengthening mechanism of Zr-based devitrified amorphous nanocomposites with quasicrystalline phases Invited Peer-reviewed

    HS Kim, H Kato, A Inoue

    METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS 15-16 205-208 2003

  363. Obsevations of stress-induced structural disorder and fictive stress in bulk metallic glasses Invited Peer-reviewed

    HS Chen, H Kato, A Inoue

    SUPERCOOLED LIQUIDS, GLASS TRANSITION AND BULK METALLIC GLASSES 754 219-230 2003

    ISSN: 0272-9172

  364. Nanoporous behavior induced by excess vacancy clustering in rapidly-solidified B2FeAl ribbons Peer-reviewed

    T Haraguchi, K Yoshimi, MH Yoo, H Kato, S Hanada, A Inoue

    DEFECT PROPERTIES AND RELATED PHENOMENA IN INTERMETALLIC ALLOYS 753 273-278 2003

    ISSN: 0272-9172

  365. Heat of Evolution and Non-Newtonian Viscous Flow of Pd40Ni40P20 Glassy Alloy Peer-reviewed

    N. Nishiyama, H. Kato, J. Saida, A. Inoue, H. S. Chen

    Jpn. J. Appl. Phys. 41 (2A) 741-745 2002/12/31

    Publisher: The Japan Society of Applied Physics

    DOI: 10.1143/JJAP.41.741  

    ISSN: 0021-4922

    More details Close

    The evolution of specific heat of a Pd40Ni40P20 glassy alloy subjected to different degrees of non-Newtonian flow condition near the glass transition temperature, $T_{\text{g } }$, was investigated by a differential scanning calorimetry (DSC) method. Three exothermic relaxation spectrums were observed in temperature dependence of the specific heat. One of the relaxations in $T>490$ K ($=T_{\text{g } }-95$ K) strongly depended on the flow condition, on the other hand, the others did weakly. This relaxation has previously been reported and is due to the long-range disordering between metal and metalloid constituents. Thus, appearance of the non-Newtonian viscous flow in this glassy alloy is associated with the disordering of the glass skeleton framed with Pd–P and Ni–P coupling by the strong shear action.

  366. Crystallization of Zr55Al10Ni5Cu30 bulk metallic glass composites containing ZrC particles Peer-reviewed

    Chen, F., Takagi, M., Imura, T., Kawamura, Y., Kato, H., Inoue, A.

    Materials Transactions 43 (1) 1-4 2002/12/31

    DOI: 10.2320/matertrans.43.1  

    ISSN: 1345-9678

  367. Strengthening Properties of Al-Based Amorphous Nanocomposites Peer-reviewed

    H. S. Kim, S. I. Hong, H. Kato, A. Inoue

    Mater. Trans. 43 2026-2030 2002/12/31

    DOI: 10.2320/matertrans.43.2026  

  368. Nanoporous Surfaces of FeAl Formed by Vacancy Clustering Peer-reviewed

    K. Yoshimi, S. Hanada, T. Haraguchi, H. Kato, T. Itoi, A. Inoue

    Mater. Trans. 43 (11) 2897-2902 2002/12/31

    Publisher: The Japan Institute of Metals and Materials

    DOI: 10.2320/matertrans.43.2897  

    ISSN: 1345-9678

    More details Close

    Numerous thermal vacancies are frozen into FeAl B2-ordered alloy ribbons by a conventional rapid-solidification technique. Through heat treatment at 723&thinsp;K, clustering of the supersaturated vacancies generates a large number of nanopores, particulary near surfaces, thus creating nanoporous surfaces. The nanoporous surface structure was confirmed by scanning electron microscopy and atomic force microscopy. The behavior of this vacancy clustering was examined by differential scanning calorimetry. An exothermic, irreversible peak, probably due to vacancy clustering, was observed around 800&thinsp;K, giving an activation evergy of about 1.17&thinsp;eV . The nanopore formation was also observed by in-situ heating experiments in a transmission electron microscope. The pores have specific morphology and crystallography with pore surfaces faceting toward {100} planes. These results suggest that the vacancy clustering is a unique process which enables us to efficiently make nanoporous surfaces.

  369. 金属ガラスの粘性流動特性

    加藤秀実

    機能材料 7 5-8 2002/12/31

  370. Straining of a polycrystal of Fe-Pd with martensite structure by uniaxial loading Peer-reviewed

    YC Liang, T Wada, H Kato, T Tagawa, M Taya, T Mori

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 338 (1-2) 89-96 2002/12

    ISSN: 0921-5093

  371. Strengthening mechanisms in Al-based and Zr-based amorphous nanocomposites Peer-reviewed

    HS Kim, SI Hong, H Kato, A Inoue

    MATERIALS TRANSACTIONS 43 (8) 2026-2030 2002/08

    ISSN: 1345-9678

    eISSN: 1347-5320

  372. Suppression of quasicrystallization by nonlinear viscous flow in Zr-Al-Ni-Cu-Pd glassy alloys Peer-reviewed

    J Saida, S Ishihara, H Kato, A Inoue, HS Chen

    APPLIED PHYSICS LETTERS 80 (25) 4708-4710 2002/06

    DOI: 10.1063/1.1488689  

    ISSN: 0003-6951

  373. A fictive stress model and nonlinear viscoelastic behaviors in metallic glasses Peer-reviewed

    Chen, H.S., Kato, H., Inoue, A.

    Materials Transactions 42 (4) 597-605 2001/12/31

    DOI: 10.2320/matertrans.42.597  

    ISSN: 1345-9678

  374. Synthesis and viscoelasticity of Zr-based bulk glassy alloy containing ZrC particles Peer-reviewed

    Kato, H., Hirano, T., Inoue, A., Kawamura, Y., Chen, H.S.

    Materials Research Society Symposium - Proceedings 644 (L11.9) 1-6 2001/12/31

    ISSN: 0272-9172

  375. Creep deformation and stress-induced structural disorder near T-g in a Zr55Al10Ni5Cu30 glassy alloy Peer-reviewed

    H Kato, A Inoue, HS Chen

    APPLIED PHYSICS LETTERS 79 (27) 4515-4517 2001/12

    DOI: 10.1063/1.1430269  

    ISSN: 0003-6951

  376. Thermal evidence of stress-induced structural disorder of a Zr55Al10Ni5Cu30 glassy alloy in the non-Newtonian region Peer-reviewed

    H. S. Chen, H. Kato, A. Inoue, J. Saida, N. Nishiyama

    Applied Physics Letters 79 (1) 60-62 2001/07/02

    DOI: 10.1063/1.1381032  

    ISSN: 0003-6951

  377. Modeling of stress-strain curves for Pd40Ni10Cu30P20 glass alloy under constant strain-rate deformation Peer-reviewed

    Hidemi Kato, Yoshihito Kawamura, Akihisa Inoue, Ho-Sou Chen

    Materials Science and Engineering A 304-306 (1-2) 758-762 2001/05/31

    DOI: 10.1016/S0921-5093(00)01588-4  

    ISSN: 0921-5093

  378. Newtonian and non-Newtonian viscosity of supercooled liquid in metallic glasses Peer-reviewed

    Yoshihito Kawamura, Toshihiro Nakamura, Hidemi Kato, Hideo Mano, Akihisa Inoue

    Materials Science and Engineering A 304-306 (1-2) 674-678 2001/05/31

    DOI: 10.1016/S0921-5093(00)01562-8  

    ISSN: 0921-5093

  379. Influence of ZrC dispersion on viscous flow behavior of the Zr-Al-Ni-Cu bulk glassy alloy Peer-reviewed

    H Kato, T Hirano, A Inoue, HS Chen, Y Kawamura

    PRICM 4: FORTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, VOLS I AND II 111-114 2001

  380. A Fictive Stress Model Calculation of Stress-Overshoot : A Nonlinear Viscoelastic Behavior in Metallic Glass Peer-reviewed

    H. S. Chen, H. Kato, A. Inoue

    Japanese Journal of Applied Physics 39 (4A) 1808-1811 2000/12/31

    Publisher: The Japan Society of Applied Physics

    DOI: 10.1143/JJAP.39.1808  

    ISSN: 0021-4922

    More details Close

    A model, based on the hypothesis of stress-induced structural relaxation and a concept of fictive stress, is proposed for nonlinear viscoelastic behavior in glassy materials. A model calculation has been carried out on the stress-overshoot phenomenon observed in metallic glasses. The model calculation reproduces the experimental results of a Pd<FONT SIZE="-1">40</FONT>Ni<FONT SIZE="-1">10</FONT>Cu<FONT SIZE="-1">30</FONT>P<FONT SIZE="-1">20</FONT> glass fairly well, in particular, the development of stress-overshoot behavior with increasing strain rate and lowered temperature. In addition, the model reveals a stress-overshoot and -undershoot oscillatory behavior which has not been reported previously in metallic glasses, but has been observed in many polymer solutions.

  381. Viscous Flows in Glassy Alloy(in Japanese) Invited

    H. Kato

    Nippon Gakujutsu Shinkokai Zairyo no Bisai Soshiki to Kinosei dai 133 linkai 20-25 2000/12/31

  382. A Fictive Stress Model Calculation of Nonlinear Viscoelastic Behaviors in a Zr-Based Glassy Alloy : Stress Growth and Relaxation Peer-reviewed

    H. Kato, Y. Kawamura, H. S. Chen, A. Inoue

    Jpn. J. Appl. Phys. 39 (9A) 5184-5187 2000/12/31

    Publisher: The Japan Society of Applied Physics

    DOI: 10.1143/JJAP.39.5184  

    ISSN: 0021-4922

    More details Close

    Nonlinear viscoelastic behaviors of a Zr55Al10Ni5Cu30 glassy alloy are investigated experimentally and by theoretical modeling, based on the hypothesis of stress-induced structural relaxation and the concept of fictive stress. The model calculation curves agree well quantitatively with the experimental results. Structural changes of the nonlinear viscoelasticity during complex-step tests are expressed directly by the fictive stress. In addition, the critical condition under which the transition from linear to nonlinear viscoelasticity occurs is clarified on the basis of this model.

  383. High strength and good ductility of Zr55Al10Ni5Cu30 bulk glass containing ZRC particles Peer-reviewed

    H. Kato, T. Hirano, A. Matsuo, Y. Kawamura, A. Inoue

    Scripta Materialia 43 (6) 503-507 2000/08/28

    Publisher: Elsevier Science Ltd

    DOI: 10.1016/S1359-6462(00)00452-8  

    ISSN: 1359-6462

  384. Transition from linear to nonlinear viscoelasticity during deformation in a Zr-based glassy alloy Peer-reviewed

    Hidemi Kato, Yoshihito Kawamura, Akihisa Inoue, Ho-Sou Chen

    Materials Transactions, JIM 41 (9) 1202-1207 2000

    Publisher: Japan Inst of Metals

    DOI: 10.2320/matertrans1989.41.1202  

    ISSN: 0916-1821

  385. Synthesis and mechanical properties of Zr55Al10Ni5Cu30 bulk glass composites containing ZrC particles formed by the in-situ reaction Peer-reviewed

    Tomoya Hirano, Hidemi Kato, Atsushi Matsuo, Yoshihito Kawamura, Akihisa Inoue

    Materials Transactions, JIM 41 (11) 1454-1459 2000

    Publisher: Japan Inst of Metals

    DOI: 10.2320/matertrans1989.41.1454  

    ISSN: 0916-1821

  386. Newtonian to non-Newtonian master flow curves of a bulk glass alloy Pd40Ni10Cu30P20 Peer-reviewed

    H Kato, Y Kawamura, A Inoue, HS Chen

    APPLIED PHYSICS LETTERS 73 (25) 3665-3667 1998/12

    DOI: 10.1063/1.122856  

    ISSN: 0003-6951

  387. Magnetic properties of (Ni1-xMnx)1.9Ge alloys

    Shiraishi, H., Hori, T., Kato, H., Onodera, H., Yamaguchi, Y., Kanematsu, K.

    Journal of Magnetism and Magnetic Materials 177-181 (PART 2) 1998

    DOI: 10.1016/S0304-8853(97)00822-6  

    ISSN: 0304-8853

  388. Bulk glassy Zr-based alloys prepared by consolidation of glassy alloy powders in supercooled liquid region Peer-reviewed

    Kato, H., Kawamura, Y., Inoue, A., Masumoto, T.

    Materials Science and Engineering A 226-228 458-462 1997/12/31

    DOI: 10.1016/s0921-5093(96)10664-x  

    ISSN: 0921-5093

  389. Fabrication of bulk amorphous alloys by powder consolidation Peer-reviewed

    Kawamura, Yoshihito, Kato, Hidemi, Inoue, Akihisa, Masumoto, Tsuyoshi

    International Journal of Powder Metallurgy (Princeton, New Jersey) 33 (2) 50-61 1997/12/31

    ISSN: 0888-7462

  390. Synthesis and mechanical properties of bulk amorphous Zr-Al-Ni-Cu alloys containing ZrC particles Peer-reviewed

    Hidemi Kato, Akihisa Inoue

    Materials Transactions, JIM 38 (9) 793-800 1997

    Publisher: Japan Institute of Metals (JIM)

    DOI: 10.2320/matertrans1989.38.793  

    ISSN: 0916-1821

  391. Consolidation of Glassy Alloy Powders at Supercooled Liquid State Peer-reviewed

    Y. Kawamura, H. Kato, A. Inoue, T. Masumoto

    Advances in Powder Metallurgy & Particulate Materials 7 365-380 1996/12/31

  392. Effects of extrusion conditions on mechanical properties in Zr-Al-Ni-Cu glassy powder compacts Peer-reviewed

    Yoshihito Kawamura, Hidemi Kato, Akihisa Inoue, Tsuyoshi Masumoto

    Materials Science and Engineering A 219 (1-2) 39-43 1996/11/30

    DOI: 10.1016/S0921-5093(96)10437-8  

    ISSN: 0921-5093

  393. High tensile strength bulk glassy alloy Zr65Al10Ni10Cu15 prepared by extrusion of atomized glassy powder Peer-reviewed

    Hidemi Kato, Yoshihito Kawamura, Akihisa Inoue

    Materials Transactions, JIM 37 (1) 70-77 1996

    Publisher: Japan Institute of Metals (JIM)

    DOI: 10.2320/matertrans1989.37.70  

    ISSN: 0916-1821

  394. Full strength compacts by extrusion of glassy metal powder at the supercooled liquid state Peer-reviewed

    Yoshihito Kawamura, Hidemi Kato, Akihisa Inoue, Tsuyoshi Masumoto

    Applied Physics Letters 67 (14) 2008 1995

    DOI: 10.1063/1.114769  

    ISSN: 0003-6951

Show all ︎Show first 5

Misc. 65

  1. Li-stuffed garnet solid electrolytes: Current status, challenges, and perspectives for practical Li-metal batteries

    Eric Jianfeng Cheng, Huanan Duan, Michael J. Wang, Eric Kazyak, Hirokazu Munakata, Regina Garcia-Mendez, Bo Gao, Hanyu Huo, Tao Zhang, Fei Chen, Ryoji Inada, Kohei Miyazaki, Saneyuki Ohno, Hidemi Kato, Shin ichi Orimo, Venkataraman Thangadurai, Takeshi Abe, Kiyoshi Kanamura

    Energy Storage Materials 75 2025/02

    DOI: 10.1016/j.ensm.2024.103970  

    eISSN: 2405-8297

  2. Correlation between mechanical properties and ionic conductivity of polycrystalline sodium superionic conductors: A relative density-dominant relationship

    Eric Jianfeng Cheng, Tao Yang, Yuanzhuo Liu, Linjiang Chai, Regina Garcia-Mendez, Eric Kazyak, Zhenyu Fu, Guoqiang Luo, Fei Chen, Ryoji Inada, Vlad Badilita, Huanan Duan, Ziyun Wang, Jiaqian Qin, Hao Li, Shin ichi Orimo, Hidemi Kato

    Materials Today Energy 44 2024/08

    DOI: 10.1016/j.mtener.2024.101644  

    eISSN: 2468-6069

  3. Mechanical Bonding of Immiscible Ti/Mg by Eutectic Melting Induced Liquid Metal Dealloying Method

    大橋勇介, 倉林康太, 和田武, 加藤秀実

    スマートプロセス学会誌 13 (4) 2024

    ISSN: 2186-702X

  4. デアロイングを利用したFe-Mg継手の強度に及ぼす接合パラメータの影響

    倉林康太, 大橋勇介, 和田武, 加藤秀実

    日本金属学会講演大会(Web) 175th 2024

  5. 高速重イオン照射によるNi-Zr金属間化合物の微視的構造変化

    森祐輔, 岩瀬彰宏, 金野泰幸, 松井利之, 和田武, 加藤秀実, 石川法人, 堀史説

    日本金属学会講演大会(Web) 174th 2024

  6. 重イオン照射したNi-Zr合金中の微細構造と硬さ変化の照射条件依存性

    大林浩也, 金野泰幸, 岩瀬彰宏, 堀史説, 石川法人, 和田武, 加藤秀実

    大阪公立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2022 2023

  7. 重イオン照射によるNi-Ti金属間化合物の局所構造および硬さの変化

    世山将大, 平山翔太, 岩瀬彰宏, 金野泰幸, 堀史説, 石川法人, 和田武, 加藤秀実

    大阪公立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2022 2023

  8. 金属溶湯脱成分法を応用した純チタン-純マグネシウム接合における界面組織と接合強度の関係

    大橋勇介, 倉林康太, 和田武, 加藤秀実

    日本金属学会講演大会(Web) 172nd 2023

  9. 共連続オープンポーラス表面層を付与した結晶金属と金属ガラス過冷却液体の含浸接合

    前川優太, 大橋勇介, 山田類, 和田武, 加藤秀実

    日本金属学会講演大会(Web) 173rd 2023

  10. 共連続ミクロ組織の形成によるTi/Mg異種材料接合

    大橋勇介, 山田類, 和田武, 加藤秀実

    日本金属学会講演大会(Web) 173rd 2023

  11. Local structure change and amorphization of NiZr intermetallics by Heavy ion Irradiation

    大林浩也, 堀史説, 平山翔太, 岩瀬彰宏, 金野泰幸, 松井利之, 加藤秀実, 和田武, 石川法人

    日本物理学会講演概要集(CD-ROM) 78 (1) 2023

    ISSN: 2189-079X

  12. ハイエントロピー金属ガラスのガラス形成能と動的機械的性質

    和田武, 大橋勇介, ジャン ジン, 加藤秀実

    日本金属学会講演大会(Web) 170th 2022

  13. Ni-Zr系金属間化合物への重イオン照射による結晶相からのアモルファス化制御

    大林浩也, 岩瀬彰宏, 岩瀬彰宏, 金野泰幸, 松井利之, 和田武, 加藤秀実, 石川法人, 堀史説

    日本金属学会講演大会(Web) 171st 2022

  14. 亜共晶Zr化合物合金への重イオン照射による微細構造と硬さ変化

    堀史説, 盛国祐太, 大林浩也, 岩瀬彰宏, 金野泰幸, 和田武, 加藤秀実, 石川法人

    大阪公立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2021 2022

  15. 重イオン照射によるNi-Al金属間化合物の局所構造と特性変化

    堀史説, 日吉遼樹, 大林浩也, 金野泰幸, 松井利之, 和田武, 加藤秀実, 石川法人, 岩瀬彰宏

    大阪公立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2021 2022

  16. 重イオン照射によるNi-Zr系金属間化合物の微細構造と硬さ変化

    大林浩也, 岩瀬彰宏, 金野泰幸, 岩瀬彰宏, 堀史説, 石川法人, 和田武, 加藤秀実

    大阪公立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2021 2022

  17. Pd20Pt20Ni20Cu20P20ハイエントロピー金属ガラス形成に対する熱力学・速度論的考察

    大橋勇介, 和田武, 加藤秀実

    粉体粉末冶金協会講演大会(Web) 2021 2021

  18. Glass-forming ability and dynamic mechanical property of high-entropy metallic glasses

    和田武, 大橋勇介, JIANG J., 加藤秀実

    日本セラミックス協会秋季シンポジウム講演予稿集(Web) 34th 2021

  19. Zr基ハイエントロピーバルク金属ガラスの作製とそのガラス形成能

    大橋勇介, 和田武, 加藤秀実

    日本金属学会講演大会(Web) 168th 2021

  20. Zr-Cu-基バルク金属ガラスのハイエントロピー化がガラス形成能・結晶化・フラジリティに及ぼす影響

    大橋勇介, 和田武, 加藤秀実

    日本金属学会講演大会(Web) 169th 2021

  21. 重イオン照射によるNi-Zr金属間化合物の微細構造と硬度変化

    大林浩也, 堀史説, 岩瀬彰宏, 金野泰幸, 和田武, 加藤秀実, 前川雅樹, 河裾厚男, 石川法人

    日本金属学会講演大会(Web) 169th 2021

  22. Zr基金属間化合物への重イオン照射による微細構造変化

    盛国祐太, 大林浩也, 岩瀬彰宏, 金野泰幸, 堀史説, 和田武, 加藤秀実, 石川法人, 前川雅樹, 河裾厚男

    大阪府立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2020 2021

  23. Zr基金属間化合物への重イオン照射による微細構造変化

    堀史説, 鷹野陽弘, 岩瀬彰宏, 和田武, 加藤秀実, 斎藤勇一, 石川法人, 徐きゅう

    大阪府立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2019 2021

  24. Zr基金属間化合物への重イオン照射による微細構造変化

    鷹野陽弘, 岩瀬彰宏, 堀史説, 和田武, 加藤秀実, 斎藤勇一, 石川法人, 徐きゅう

    大阪府立大学研究推進機構放射線研究センター放射線施設共同利用報告書 2018 2020

  25. 高出力Mg蓄電池を目指した液体S/FeS2複合正極のその場合成

    古橋卓弥, 下川航平, 河口智也, 和田武, 加藤秀実, 市坪哲

    電気化学会東北支部セミコンファレンス・東北若手の会(CD-ROM) 51st 2020

  26. 高エネルギー重イオン照射による金属間化合物の局所構造変化

    鷹野陽弘, 杉田健人, 岩瀬彰宏, 和田武, 加藤秀実, 前川雅樹, 河裾厚男, 石川法人, 喜多村茜, 堀史説

    日本金属学会講演大会(Web) 165th 2019

  27. Development and histological behavior of Zr-based metallic glasses for dental implant

    山本照子, 清流正弘, 井田裕人, 佐々木聡史, 佐々木周太郎, 古原忠, 加藤秀実, 正橋直哉

    東北大学金属材料研究所新素材共同研究開発センター共同利用研究報告書(CD-ROM) 2017 95‐96 2018/06/25

  28. Development of high-strength porous Ti-based bulk metallic glasses for application as biomaterials-Effect of pore size on mechanical properties of porous Ti-based bulk metallic glasses-

    XIE Guoqiang, XIE Guoqiang, XIE Guoqiang, 金高弘恭, 金高弘恭, 加藤秀実

    東北大学金属材料研究所新素材共同研究開発センター共同利用研究報告書(CD-ROM) 2017 93‐94 2018/06/25

  29. Various features modification of bulk amorphous alloys with high energetic particles irradiation

    堀史説, 角倉優雅, 鷹野陽弘, 岩瀬彰宏, 和田武, 加藤秀実

    東北大学金属材料研究所新素材共同研究開発センター共同利用研究報告書(CD-ROM) 2017 2018

  30. 高エントロピー合金の室温緩和挙動

    岡本範彦, LUCKABAUER Martin, 渡辺宏眸, 山本篤史郎, 林好一, 加藤秀実, 市坪哲

    日本金属学会講演概要(CD-ROM) 163rd 2018

    ISSN: 2433-3093

  31. Development and histological behavior of Zr-based metallic glasses for dental implant

    山本照子, 清流正弘, 井田裕人, 土江雄治朗, 古原忠, 加藤秀実

    東北大学金属材料研究所新素材共同研究開発センター共同利用研究報告書(CD-ROM) 2016 91‐92 2017/07/06

  32. リチウムイオン蓄電池負極用大比表面積オープンセル型ポーラスシリコン粉末の開発

    和田 武, 市坪 哲, 湯蓋 邦夫, 吉田 浩一, 瀬川 晴彦, 加藤 秀実

    化学工業 65 25-32 2014

  33. Dynamic Relaxation of Pd_<42.5>Ni_<7.5>Cu_<30>P_<20> Metallic Glass

    KATO Hidemi, ICHITSUBO Tetsu, WANG Hao, WADA Takeshi

    60 (5) 228-235 2013/05/15

    ISSN: 0532-8799

  34. 23aHY-9 Collective excitation of metallic glass CuZrAl

    Yamaguchi H., Kawakita Y., Ohara K., Takeda S., Tsutsui S., Baron A. Q. R., Ishikawa D., Nakashima S., Otomo T., Ito K., Fukunaga T., Kato H., Hasegawa M.

    Meeting abstracts of the Physical Society of Japan 65 (1) 846-846 2010/03/01

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  35. Zr基バルク金属ガラスのガラス遷移温度以下の温度におけるクリープ変形挙動

    藤田 和孝, 河村 祐平, 木村 真嗣, 徳永 仁夫, 横山 嘉彦, 加藤 秀実, 井上 明久

    日本金属学会誌 74 (9) 614-621 2010

    DOI: 10.2320/jinstmet.74.85  

  36. 金属ガラスの内在的な弾性不均質性

    市坪哲, 加藤秀実, 琵琶志朗, 細川伸也, 松原英一郎

    日本金属学会講演概要 145th 334 2009/09/15

    ISSN: 1342-5730

  37. 26aTH-11 Phonon dynamics in metallic glass CuZr_2 -3

    Nakashima S., Kawakita Y., Otomo T., Suenaga R., BARON Alfred.Q.R., Tsutsui S., Takeda S., Itoh K., Kato H., Fukunaga T., Hasegawa M.

    Meeting abstracts of the Physical Society of Japan 63 (1) 783-783 2008/02/29

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  38. 22aXP-8 Phonon dinamics in metallic glass CuZr_2 -2

    Nakashima S., Kawakita Y., Otomo T., Suenaga R., BARON Alfred. Q. R., Tsutsui S., Takeda S., Itoh K., Kato H., Fukunaga T., Hasegawa M.

    Meeting abstracts of the Physical Society of Japan 62 (2) 812-812 2007/08/21

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  39. 18pXF-3 Phonon dinamics in metallic glass CuZr_2

    Nakashima S., Kawakita Y., Otomo T., Suenaga R., Baron Alfred Q. R., Tsutsui S., Kohara S., Takeda S., Itoh K., Kato H., Fukunaga T., Hasegawa M.

    Meeting abstracts of the Physical Society of Japan 62 (1) 770-770 2007/02/28

    Publisher: The Physical Society of Japan (JPS)

    ISSN: 1342-8349

  40. Zr-Cu-Al金属ガラスの価電子帯電子構造

    曽田一雄, 鈴木孝治, 竹内恒博, 長谷川正, 加藤秀実, 佐藤洋一, 水谷宇一郎

    日本金属学会講演概要 140th 2007

    ISSN: 1342-5730

  41. Glass Formation Dependence on Casting Atmosphere in a Zr-Al-Ni-Cu-Pd Alloy System

    A. D. Setyawan, H. Kato, J. Saida, A. Inoue

    Materials Research Society Symposium Proceedings 1048E Z08-18 2007

  42. Phonon dispersion of metallic glass CuZr2 Peer-reviewed

    S. Nakashima, Y. Kawakita, T. Otomo, R. Suenaga, R. Baron, S. Tsutsui, S. Kohara, S. Takeda, K. Itoh, H. Kato, T. Fukunaga, M. Hasegawa

    Journal of Physics: Conference Series 92 (1) 2007

    DOI: 10.1088/1742-6596/92/1/012136  

  43. Hot Pressing Consolidation Mechanisms of Bulk Metallic Glass Powders

    R. Watanabe, H.M. Kimura, H. Kato, A. Inoue

    J. Jpn. Soc. Powder Powder Metallurgy 54 (11) 761-767 2007

    Publisher: Japan Society of Powder and Powder Metallurgy

    DOI: 10.2497/jjspm.54.761  

    ISSN: 0532-8799 1880-9014

    More details Close

    Hot pressing mechanisms are reviewed with special interest in the hot consolidation of metallic glass powders that exhibit a perfect viscous flow above the glass transition temperatures. The total densification process is divided into three stages; neck growth stage, cylindrical pore stage and isolated pore stage, for each of which the densification model and the critical relative density, separating the three stages, are unequivocally represented. The kinetic equations for the densification during hot pressing by the viscous flow mechanism are derived from those hitherto proposed for the power-law creep mechanism, in which the index of the constitutive equation is set to be unity. The equations for the relative density as functions of the hot pressing time and pressure are provided for the three stages of densification. An application of the kinetic equations to a processing design of the hot consolidation of metallic glass powders is demonstrated. The proposed set of the three equations enables an estimation of appropriate pressure and time for the full consolidation of metallic glass powders. The influence of entrapped gas in the final stage of hot pressing is also discussed.

  44. 赤外線ろう接によるTi-6Al-7Nb/Pd_<40>Cu_<30>Ni_<10>P_<20>金属ガラス接合界面の透過電子顕微鏡観察

    三浦 永理, 加藤 秀実, Ice G.E, 白石 孝信, 井上 明久, 久恒 邦博

    歯科材料・器械 26 (2) 146-146 2007

    Publisher: The Japanese Society for Dental Materials and Devices (JSDMD)

    DOI: 10.14832/gsjsdmd.2007s.0.90.0  

    ISSN: 0286-5858

  45. Room temperature plasticity of Zr65Al7.5Nl10Cu 17.5-xPdx bulk metallic glasses

    Yoshimi, K., Kato, H., Saida, J., Inoue, A.

    Materials Science Forum 539-543 (PART 2) 2054-2058 2007

    Publisher: Materials Science Forum

    DOI: 10.4028/0-87849-428-6.2054  

    ISSN: 1662-9752 0255-5476

  46. Origin of different dependence of apparent glass-forming ability on casting-atmosphere-pressure in Zr-Al-Ni-Cu-Pd alloy system

    Setyawan, A.D., Kato, H., Saida, J., Inoue, A.

    Materials Science Forum 561-565 (PART 2) 1311-1314 2007

    Publisher: Materials Science Forum

    DOI: 10.4028/0-87849-462-6.1311  

    ISSN: 1662-9752 0255-5476

  47. Synthesis and Properties of Nanostructure Controlled Metallic Glasses

    Saida J, Kato H, Setyawan A.D.H, Inoue A

    Journal of Physics: Conference Series 61 1002-1006 2007

    DOI: 10.1088/1742-6596/61/1/198  

  48. Cu系金属ガラスの弾性特性評価と準調和近似理論による解析

    垂水竜一, 平尾雅彦, 市坪哲, 松原英一郎, 才田淳治, 加藤秀実

    日本金属学会講演概要 139th 432 2006/09/16

    ISSN: 1342-5730

  49. Hydrogen-induced internal friction of Ti-rich multicomponent glassy alloys

    Hasegawa, M., Takeuchi, M., Kato, H., Yamaura, Y., Inoue, A.

    Materials Science and Engineering A 442 (1-2 SPEC. ISS.) 106-108 2006

    DOI: 10.1016/j.msea.2006.02.214  

    ISSN: 0921-5093

  50. Cu基バルク金属ガラスの高温域における弾性特性評価

    柴田明, 垂水竜一, 荻博次, 平尾雅彦, 市坪哲, 松原英一郎, 加藤秀実, 才田淳治

    超音波エレクトロニクスの基礎と応用に関するシンポジウム講演予稿集 26th 359-360 2005/11/16

    Publisher: Steering committee of symposium on ultrasonic electronics

    ISSN: 1348-8236

  51. CuHfTiバルク金属ガラスの弾性率とその温度依存性

    垂水竜一, 柴田明, 荻博次, 平尾雅彦, 市坪哲, 松原英一郎, 才田淳治, 加藤秀実

    日本金属学会講演概要 137th 267 2005/09/28

    ISSN: 1342-5730

  52. CuZrTi金属ガラスの低温弾性特性

    垂水竜一, 柴田明, 荻博次, 平尾雅彦, 市坪哲, 松原英一郎, 加藤秀実, 才田淳治

    日本金属学会講演概要 136th 289 2005/03/29

    ISSN: 1342-5730

  53. Zr系金属ガラスの相安定性と電子構造

    長谷川正, 武富剛士, 竹内恒博, 曽田一雄, 佐藤洋一, 加藤秀実, 中野さくら, 水谷宇一郎

    日本金属学会講演概要 136th 2005

    ISSN: 1342-5730

  54. Zr-Co-Al金属ガラスと関連結晶化合物の相安定性

    武富剛士, 長谷川正, 加藤秀実, 湯蓋邦夫, 竹内恒博, 佐藤洋一, 曽田一雄, 水谷宇一郎, 井上明久

    日本金属学会講演概要 136th 2005

    ISSN: 1342-5730

  55. バルク金属ガラスの変形・破壊挙動

    加藤秀実, 井上明久

    金属 75 (2) 107-112 2005

    Publisher: アグネ技術センター

    ISSN: 0368-6337

  56. Nanoindentation Characteristics of In-situ Formed Cu-Hf-Ti-Ag-Ta Bulk Metallic Glass Composites

    Bian Z, Kato H, Inoue A

    Materials Transactions 46 (4) 798-804 2005

    Publisher: The Japan Institute of Metals and Materials

    DOI: 10.2320/matertrans.46.798  

    ISSN: 1345-9678

    More details Close

    This article was retracted. See the Notification.

  57. Non-equilibrium arc-melted binary Ti-Fe bulk alloys with ultra-high strength and enhanced ductility

    Louzguine, D.V., Kato, H., Inoue, A.

    Journal of Metastable and Nanocrystalline Materials 24-25 49-52 2005

    DOI: 10.4028/www.scientific.net/JMNM.24-25.49  

    ISSN: 1422-6375

  58. Zr-M-Al(M=Ni,Cu)金属ガラスと関連結晶化合物の相安定性

    武富剛士, 長谷川正, 加藤秀実, 竹内恒博, 佐藤洋一, 曽田一雄, 水谷宇一郎, 井上明久

    日本金属学会講演概要 135th 2004

    ISSN: 1342-5730

  59. Zr-Ni-Al系金属ガラスの結晶化過程と準安定化合物

    武富剛士, 長谷川正, 加藤秀実, 竹内恒博, 佐藤洋一, 曽田一雄, 水谷宇一郎, 井上明久

    日本金属学会講演概要 134th 2004

    ISSN: 1342-5730

  60. バルク金属ガラスの変形と破壊(室温変形に対する高温変形からのアプローチ)

    加藤秀実, 井上明久

    第49回材料強度と破壊総合シンポジウム論文集49 49 35-42 2004

  61. High strength and ductile binary Ti-Fe composite alloy

    Louzguine, D.V., Kato, H., Inoue, A.

    Journal of Alloys and Compounds 384 (1-2) L1-L3 2004

    DOI: 10.1016/j.jallcom.2004.03.114  

    ISSN: 0925-8388

  62. Pd基バルクガラス合金の非線形粘弾性変形に伴う比熱と構造の変化

    加藤秀実, 松原英一郎, 井上明久, 西山信行, 才田淳治, CHEN H S

    日本金属学会講演概要 130th 370 2002/03/28

    ISSN: 1342-5730

  63. 415 Tribological Properties of Zr-based Metallic Glass and Its Composites

    KATO Yoko, TAKAGI Makoto, IMURA Toru, KAWAMURA Yoshihito, KATO Hidemi, INOUE Akihisa

    2001 (50) 209-210 2001/03/01

    Publisher: The Japan Society of Mechanical Engineers

  64. バルクガラス合金の開発とその展開

    井上明久, 加藤秀実

    日本学術振興会材料の微細組織と機能性 第133委員会 137-142 2001

  65. Superviscoplastic Consolidation of Zr-Based Metallic Glass

    Kawamura Y, Kato H, Inoue A

    Advanced Materials -4 486-489 1998

Show all ︎Show first 5

Books and Other Publications 4

  1. 全固体電池のイオン伝導性向上技術と材料、製造プロセスの開発

    和田武, 加藤秀実, 市坪哲

    株式会社 技術情報協会 2017/02/28

    ISBN: 9784861046476

    More details Close

    ひずみ解放機構を有するオープンセル型バルクナノポーラスシリコン材料の合成技術

  2. Interface Oral Health Science 2016 ed. Sasaki, Suzuki and Takahashi

    H. Kato, T. Wada, M. Sadeghilaridjani

    Springer Open 2016

    ISBN: 9789811015595

  3. Interface Oral Health Science 2014 : innovative research on biosis-abiosis intelligent interface

    Fukuzumi, Y, Wada, T, Kato, H

    Springer Open 2015

    ISBN: 9784431551256

  4. Advances in Metallic Biomaterials, ed. Niinomi, Narushima and Nakai

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

    2015

    ISBN: 3662468425

Presentations 81

  1. Liquid Metal Dealloying Invited

    Hidemi KATO

    Shanghai Jiao Tong University 2024/12/04

  2. Liquid metal alloying; A new metallurgical method utilizing ummixing properties Invited

    Hidemi Kato, Takeshi Wada, Soo-hyun Joo, Jung-Wook Kim, Seung-Guen Yu, Won-Young Park Yeon-Beom Jeong, Hyoung-Seop Kim, Ilya Okulov, Pierre-Antoine Geslin

    Pusan National University 2024/08/09

  3. Liquid Metal Dealloying: A New Metallurgical Method Utilizing Unmixing Properties Invited

    Hidemi KATO

    NANO KOREA 2024 2024/07/04

  4. Liquid Metal Dealloying: A New Metallurgical Method Utilizing Unmixing Properties Invited

    Hidemi KATO

    Dankook University 2024/07/02

  5. Dissimilar Joining using Metallurgical Dealloying Reaction Invited

    加藤秀実

    JWRI/ACerS 3rd Global Conference and Exhibition on Smart Additive Manufacturing, Design & Evaluation (Smart MADE 2024) 2024/04/12

  6. Dissimilar Joining using Dealloying Invited

    Hidemi Kato

    2023 MRS Fall Meeting & Exhibit 2023/11/28

  7. Discussion on High Entropy Effect on Ligament Growth in Nanoporous TiVNbMoTa Alloy

    Hidemi Kato

    PRICM11(The 11th Pacific Rim International Conference on Advanced Materials and Processing) 2023/11/21

  8. 金属溶湯脱成分法を用いたナノポーラス材料の開発 Invited

    加藤秀実

    粉体粉末冶金協会 2023年度秋季大会(第132回講演大会) 2023/10/20

  9. Decoupling between thermodynamic and dynamical glass transition in high entropy metallic glasses Invited

    加藤秀実

    The 9th International Discussion Meeting on Relaxations in Complex Systems (9 IDMRCS) 2023/08/16

  10. 金属溶湯脱成分法を用いたポーラス炭素の開発 Invited

    加藤秀実

    第3回 CPC研究会 2023/07/14

  11. 金属溶湯脱成分法を用いた新材料研究 Invited

    加藤秀実

    大阪大学接合科学研究所招聘教授特別講演 2023/03/30

  12. 金属溶湯脱成分法を用いた金属の共連続ナノポーラス化と電解コンデンサへの応用 Invited

    加藤秀実

    電気化学会第90 回大会 2023/03/27

  13. Liquid Metal Dealloying for Functional/Structural Materials Invited

    Ruirui Song, Yeon Beom Jeong, Hidemi Kato

    The 17th International Symposium on Novel and Nano Materials(ISNNM) 2022/11/15

  14. 脱成分法を用いたチタンの共連続ポーラスおよび複合材料化 Invited

    加藤秀実

    日本鉄鋼協会 令和2年度チタンフォーラム第1回研究発表会、良好な地球環境を継続的に維持するためのチタンとその合金の開発 ~ チタン系ハイエントロピー合金の現状と展望 ~ 2021/01/29

  15. 金属液体中での脱成分現象を利用したポーラス炭素薄膜の作製とその特性 Invited

    加藤秀実

    化学系学協会東北大会 2020/09/27

  16. ハイエントロピー効果に基づく新材料と新機能の探査 Invited

    加藤秀実

    日本金属学会2020年秋期講演大会(第167回) 2020/09/17

  17. Liquid metal dealloying and its P/M application International-presentation Invited

    KATO Hidemi

    International Symposium on Innovation in Materials Processing (ISIMP2019) 2019/11/06

  18. Nanoporous and Nanocomposite metals by Liquid Metal Dealloying International-presentation

    KATO Hidemi

    Tohoku University・IMT Mines Albi Joint Symposium SAKES (Sendai Albi Knowledge in Engineering Seminars) 2019/10/24

  19. Three-dimensional bicontinuous nanoporous high-entropy alloy by liquid metal dealloying Invited

    加藤 秀実

    日本金属学会2019年秋期講演大会(第165回) 2019/09/12

  20. Three-dimensional bicontinuous nanoporous high-entropy alloy and its sluggish coarsening International-presentation Invited

    KATO Hidemi

    2019 Third International Symposium on Nanoporous Materials by Alloy Corrosion 2019/02/24

  21. 脱成分現象を利用した新規材料開発 Invited

    加藤 秀実

    鉄鋼協会東北地区講演会 2019/01/18

  22. Effect of minor dopant on ligament growth of porous metals prepared by liquid metal dealloying International-presentation Invited

    KATO Hidemi

    Russia-Japan Joint Seminar “Non-equilibrium processing of materials: experiments and modeling” 2018/10/01

  23. Imprinting Metallic Glass Analyser Grating for X-ray Talbot Interferometer International-presentation Invited

    加藤 秀実

    THERMEC'2018 2018/07/08

  24. Imprinting Pd-based metallic glass grating with Si mold International-presentation Invited

    KATO Hidemi

    The 12th International Conference on Bulk Metallic Glasses (BMG Xll) 2018/05/27

  25. 金属ガラスの緩和挙動と構造不均質性 Invited

    加藤 秀実

    日本金属学会2018年春期講演大会(第162回) 2018/03/19

  26. Relaxation and Deformation in Metallic glass International-presentation Invited

    KATO Hidemi

    6th ESISM(Elements Strategy Initiative for Structural Materials) International Workshop 2018/02/27

  27. 金属溶湯中の脱成分反応を利用したポーラス金属の開発

    日本金属学会東北支部地区講演会 2017/11/17

  28. Suppressing Ligament Growth of Porous Metals during Liquid Metal Dealloying Process International-presentation

    JSPM International Conference on Powder and Powder Metallurgy ~ 60th Anniversary ~ (JSPMIC2017) 2017/11/06

  29. Formation and Morphological Evolution of Nano/Micro Porous Metals by Liquid Metal Dealloying International-presentation

    24th International Symposium on Metastable, Amorphous and Nanostructured Materials(ISMANAM2017) 2017/06/18

  30. 金属ガラスの弾性、延性および擬弾性

    粉体粉末冶金協会 平成29年度春季大会(第119回講演大会) 2017/05/31

  31. 金属溶湯中の脱成分現象を利用した金属ガラス複合材料の作製とポーラス金属への応用

    日本材料学会金属ガラス部門委員会第39回研究会 2016/11/18

  32. 金属溶湯中の脱成分現象を用いた金属ガラス複合材料の作製とポーラス金属開発への展開

    日本材料学会 第2回材料WEEK 材料シンポジウム 2016/10/11

  33. Recent progress on liquid metal dealloying(LMD) in Tohoku Univ. International-presentation

    Second International Symposium on Nanoporous Materials by Alloy Corrosion 2016/09/23

  34. 金属溶湯脱成分法を用いたポーラス卑・半金属の作製とそのエネルギーデバイスへの応用

    日本金属学会2016年秋期講演大会 2016/09/21

  35. 金属ガラスのナノスケール不均質性と機械的性質

    日本金属学会2016年秋期講演大会 2016/09/21

  36. High aspect grating by imprinting metallic glasses with less viscous workability International-presentation

    The 16th International Conference on Liquid and Amorphous Metals (LAM-16) 2016/09/04

  37. High aspect ratio grating by imprinting Gd-based metallic glass with less viscous workability International-presentation

    9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9) 2016/08/01

  38. Reaction Design for Mg-Based Metallic Glass with In Situ Ti Dispersoids, and Its Development to Macro-Porous Base/Half Metals International-presentation

    23rd International Symposium on Metastable, Amorphous and Nanostructured Materials(ISMANAM2016) 2016/07/03

  39. Dealloying by Metallic Melt

    加藤 秀実

    3rd International DNTAC (Defense Nano Technology Application Center) Symposium 2015/11/05

  40. Nanoporous Metals by Dealloying in Metallic Melt and Their Application for Energy Devices International-presentation

    International Conference on Functional Materials for Frontier Energy Issues 2015/10/01

  41. On processing condition for metallic glass with low viscous workability International-presentation

    Amorphous and Nanostructural Magnetic Materials (ANMM2015) 2015/09/21

  42. Dealloying by Metallic Melts International-presentation

    Energy Materials Nanotechnology (EMN2015) 2015/09/01

  43. Discussion on nonisothermal creep recovery of Pd-Ni-Cu-P glass based on dynamic relaxation modes International-presentation

    Hao Wang, Tetsu Ichitsubo

    Thermec 2013 2013/12/02

  44. BMG Matrix Composites Developed with Dealloying in Metallic Melts International-presentation

    Hideki Oka, Wei Guo, Takeshi Wada

    MRS Fall 2013 2013/12/01

  45. 金属浴中での脱成分反応を利用したオープンセル型ナノ・マイクロポーラス金属の開発

    第142回電子セラミック・プロセス研究会 2013/06/22

  46. Pd基金属ガラスの動的緩和挙動の解釈と静的緩和挙動への展開

    日本材料学会金属ガラス部門委員会 2013/06/21

  47. 金属溶湯内デアロイング現象を用いた生体材料および傾斜機能材料開発

    粉体粉末冶金協会平成23年度秋季大会 2011/10/26

  48. Strain Recovery and Structural Inhomogeneity in Metallic Glass International-presentation

    H. Wang, A. Inonue

    IUMRS-ICA2011 2011/09/19

  49. Anisothermal Creep Recovery Indicating the Structural Inhomogeneity and Relaxation Distribution International-presentation

    H. Wang, A. Inoue

    The 14th International Conference on Rapidly Quenched and Metastable Materials (RQ14) 2011/08/28

  50. A Novel Processing Method for Bulk Metallic Glass Composite International-presentation

    H. Oka, T. Wada, A. Inoue

    International Conference on Processing and Manufacturing of Advanced Materials 2011/08/01

  51. A Novel Preparation Method for Mg-based BMG Matrix Composite International-presentation

    Hideki Oka, Takeshi Wada, Kunio Yunbuta, Hidemi Kato, Akihisa Inoue

    TMS 2011 Annual Meeting & Exhibition 2011/02/27

  52. Novel Preparation Method for Mg-based BMG Matrix Compposite with the In-Situ Ti Dispersoids International-presentation

    H. Oka, T. Wada, K. Yubuta, H. Kato, A.Inoue

    MRS Fall Meeting 2010 2010/11/29

    More details Close

    Excellent Presentation in Symposium U, Bulk Metallic Glasses and Their Applications に選出される

  53. 金属ガラスの動的緩和挙動と構造的不均質性

    加藤秀実, 市坪哲, 井上明久

    日本金属学会春期(第146回)大会 2010/03/30

  54. Mechanical Relaxations in Bulk Metallic Glass International-presentation

    H. Kato, T. Ichitsubo, A. Inoue

    中国(台湾)材料科学学会年会 2009/11/27

  55. Mechanical Relaxations in Metallic Glasses International-presentation

    H. Kato, T. Ichitusbo, A. Inoue

    The 7th International Conference on Bulk Metallic Glasses 2009/11/01

  56. 金属ガラスの機械的性質と生体材料への応用例と更なる可能性

    加藤秀実, 和田武, 玉正中, 井上明久

    粉体粉末冶金協会平成21年度秋季大会 2009/10/29

  57. Dynamic Mechanical Relaxations in Metallic Glasses International-presentation

    H. Kato, A. Inoue

    JSPS-KOSEF Asian Core Program The Fifth Japan-Korea Workshop on Metallic Glasses 2009/10/16

  58. Dynamic Relaxation and Its Correlation to Quasi-static Mechanical Properties in Bulk Metallic Glass International-presentation

    H. Kato, A. Inoue

    The Third International Conference on the Characterization and Control Interfaces for High Quality Advanced Materials, and Joining Technology for New Metallic Glasses and Inorganic Materials 2009/09/06

  59. Dynamic a- & b- Relaxations in Metallic Glasses International-presentation

    H. Kato, A. Inoue, T. Ichitsubo, J. M. Pelletier, J. Saida

    The International Discussion Meeting on Relaxations in Complex Systems 2009/09/02

  60. Development of Mg-based Bulk Metallic Glass and its Composite International-presentation

    Hideki Oka, Akihisa Inoue

    The 23rd KIM-JIM Symposium 2008/10/23

  61. Correlation between thermal expansion coefficient and Tg of metallic glasses International-presentation

    H. S. Chen, Akihisa Inoue

    The 13th International Conference on Rapidly Quenched & Metastable Materials (RQ13) 2008/08/24

  62. Development of Mg-based Bulk Metallic Glass and its Composite International-presentation

    Hideki Oka, Akihisa Inoue

    The 3rd International Symposium on Nano-Bio and Amorphous Materials 2008/08/07

  63. Temperature dependence of the yield strain of a Zr-based metallic glass at the glassy state International-presentation

    Hitoshi Igarashi, Akihisa Inoue

    The 14th International Symposium on Metastable and Nano-Materials 2007/08/26

  64. Development of Mg-based Bulk Metallic Glass and its Composite International-presentation

    Makoto KINAKA, Akihisa INOUE

    The 1st Shanghai International Workshop on Advanced Magnesium Alloys and Their Applications 2007/08/01

  65. Fragility and Thermal Stability of Noble Metal-Based Bulk Glass Forming Liquids and Their Correlation with Workability International-presentation

    Takeshi WADA, Junji SAIDA, Masashi HASEGAWA, Akihisa INOUE, Ho Sou CHEN

    International Workshop on NANO and AMORPHOUS MATERIALS 2006/11/22

  66. Fragility and thermal stability of noble-metal based bulk glass forming liquids and their correlation with workability International-presentation

    Takeshi Wada, Masashi Hasegawa, Junji Saida, Akihisa Inoue, H. S. Chen

    Yonsei-Tohoku Korea-Japan Core Program 2006 General Symposium 2006/11/21

  67. Influence of Pd Content and Hydrostatic Pressure during Casting on Structure and Strength of Zr-Al-Ni-Cu-Pd rods International-presentation

    Junji Saida, Akihisa Inoue

    11th International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials 2004/08/22

  68. Softening and heating behaviors during the nonlinear viscous flow and their influence on glassy phase of Zr-based bulk metallic glasses International-presentation

    Akihisa Inoue, H. S. Chen

    12 th International Conference on Liquid and Amorphous Metals (LAM12) 2004/07/14

  69. バルク金属ガラスの変形と破壊(室温変形に対する高温変形からのアプローチ)

    井上明久

    第49回材料強度と破壊総合シンポジウム 2004/03/29

  70. Heating and structural disordering effects of the nonlinear viscous flow in a Zr55Al10Ni5Cu30 bulk metallic glass International-presentation

    Akihisa Inoue, H. S. Chen

    MRS Fall 2003 2003/12/01

  71. 非ニュートン粘性流動のHeating とStructural Disordering効果

    井上明久, H. S. Chen

    第47回日本学術会議材料研究連合講演会 2003/10/29

  72. Influence of in-situ nanoprecipitation on constant load deformation in the glass transition region in a Cu60Zr30Ti10 bulk metallic glass International-presentation

    Dmitri. V. Louzguine, Akihisa Inoue, H. S. Kim, H. S. Chen

    IUMRS-ICAM2003 2003/10/08

  73. Constitutive model and finite element analysis of deformation behaviour of bulk metallic glasses International-presentation

    H. S. Kim, Akihisa Inoue, H. S. Chen

    IUMRS-ICAM2003 2003/10/08

  74. Observation of stress-induced structural disorder and fictive stress in bulk metallic glasses International-presentation

    H. S. Chen, Akihisa Inoue

    MRS Fall2002 2002/12/02

  75. CORRELATION BETWEEN THERMAL EXPANSION AND GLASS TRANSITION TEMPERATURE OF BULK GLASSY ALLOYS International-presentation

    Nobuyuki Nishiyama, Baolong Shen, Akihisa Inoue, H.S. Chen

    MRS Fall 2002 2002/12/02

  76. Effect of μm-ZrC Dispersoids and Nanoprecipitates on Mechanical Properties of CuZrTi Bulk Glasses International-presentation

    Dmitri. V. Louzguine, Akihisa Inoue, H.S. Kim, S. I. Hong

    9 th International Symposium on Metastable, Mechanically Alloyed & Nanocrystalline Materials 2002/09/08

  77. Heat evolution and structural analysis on the non-Newtonian viscous flow of Pd40Ni40P20 glassy alloy International-presentation

    Ei-ichiro Matsubara, Akihisa Inoue, Nobuyuki Nishiyama, H. S. Chen

    11 th Internetional Conference on Rapidly Quenched & Metastable Materials 2002/08/25

  78. Synthesis and Viscoelasticity of Zr-based Bulk Glassy Alloy Containing ZrC Particles International-presentation

    Tomoya Hirano, Akihisa Inoue, H. S. Chen

    MRS Fall2000 2000/11/27

  79. 金属ガラスの粘性流動

    井上明久

    材料の微細組織と機能性第133委員会第165回研究会 2000/04/21

  80. ⾦属ガラスの形成・緩和と成形加⼯ Invited

    加藤秀実

    一般社団法人スマートプロセス学会 2023年度「学術講演会」 2023/11/10

  81. 金属液体中の脱成分現象を応用した医療用金属材料の開発 Invited

    加藤秀実

    3大学医工連携オンラインセミナー ~メタマテリアル・革新的センサー・基礎代謝測定・医療用金属材料 2021/05/28

Show all Show first 5

Industrial Property Rights 34

  1. 多孔質炭素材料の製造方法および球状の多孔質炭素材料

    加藤 秀実, 津田 雅史, 高野 勇郷, 鈴木 庸介, 茅野 務, 鎌田 晃二, 室中 正太

    特許ZL 201680080841.5

    Property Type: Patent

  2. METHOD FOR PRODUCING POROUS MEMBER

    Takeshi Wada, Hidemi Kato

    特許U.S. Patent No.11,180,857 B2

    Property Type: Patent

  3. 波面制御素子の製造方法

    矢代 航, 加藤 秀実, 北條 大介

    特許6968419

    Property Type: Patent

  4. 炭素複合材料

    加藤 秀実, 津田 雅史, 高野 勇郷, 鈴木 庸介, 茅野 務, 鎌田 晃二, 室中 正太

    特許第6900149号(P6900149)

    Property Type: Patent

  5. 成形材料の製造方法、成形材料、波面制御素子および回折格子

    加藤 秀実, 矢代 航

    特許第6863589号

    Property Type: Patent

  6. 多孔質炭素材料の製造方法および球状の多孔質炭素材料

    加藤 秀実, 津田 雅史, 高野 勇郷, 鈴木 庸介, 茅野 務, 鎌田 晃二, 室中 正太

    特許第6754198号(P6754198)

    Property Type: Patent

  7. 金属部材の製造方法

    和田 武, 加藤 秀実

    特許第6747670号(P6747670)

    Property Type: Patent

  8. ポーラス部材の製造方法

    和田 武, 加藤 秀実

    特許第6747673号(P6747673)

    Property Type: Patent

  9. ナノ複合金属部材の製造方法および相分離系金属固体同士の接合方法

    和田 武, 加藤 秀実

    特許第6710707号(P6710707)

    Property Type: Patent

  10. リチウム空気二次電池

    野原 正也, 林 政彦, 由井 悠基, 阪本 周平, 小松 武志, 加藤 秀実, 和田 武, 森下 史弥

    特許第6682102号(P6682102)

    Property Type: Patent

  11. 多孔質黒鉛の製造方法および多孔質黒鉛

    加藤 秀実, 兪 承根, 和田 武

    特許第6506738号(P6506738)

    Property Type: Patent

  12. リチウム空気二次電池およびリチウム二次電池用の空気極の製造方法

    野原 正也, 阪本 周平, 由井 悠基, 林 政彦, 中村 二朗, 加藤 秀実, 和田 武

    特許第6344823号(P6344823)

    Property Type: Patent

  13. 断熱材及びこれを用いた樹脂成形用金型

    石川 智仁, 藤田 行俊, 清水 雄太, 本江 克次, 加藤 秀実, 井上 明久

    特許第6029133号(P6029133)

    Property Type: Patent

  14. 非晶質金属部材の接合方法及び前記方法で接合する複合部材の製造方法

    加藤 秀実, 王 新敏, 井上 明久, 宮本 和夫

    特許第5938538号

    Property Type: Patent

  15. Metal member manufacturing method and metal member

    Hidemi Kato, Takeshi Wada, Kunio Yubuta, Akihisa Inoue

    特許US Patent No.9.279,186 B2

    Property Type: Patent

  16. 多孔質シリコン複合体粒子及びその製造方法

    吉田 浩一, 三好 一富, 久留須 一彦, 谷 俊夫, 幡谷 耕二, 西村 健, 加藤 秀実, 和田 武

    特許第5877025号(P5877025)

    Property Type: Patent

  17. 多孔質シリコン粒子及び多孔質シリコン複合体粒子並びにこれらの製造方法

    吉田 浩一, 瀬川 春彦, 谷 俊夫, 西村 健, 加藤 秀実, 和田 武

    特許第5830419号

    Property Type: Patent

  18. Co基金属ガラス合金、磁心、電磁変換機および時計

    正井 智, 土屋 和博, 井上 明久, 加藤 秀実

    特許第5700328号(P5700328)

    Property Type: Patent

  19. 金属部材の製造方法および金属部材

    加藤 秀実, 和田 武, 湯葢 邦夫, 井上 明久

    特許第5678353号

    Property Type: Patent

  20. 多孔質シリコン粒子及びその製造方法

    吉田 浩一, 三好 一富, 久留須 一彦, 谷 俊夫, 幡谷 耕二, 西村 健, 加藤 秀実, 和田 武

    特許第5598861号

    Property Type: Patent

  21. 溶融亜鉛耐食性金属ガラス

    清水 雄太, 牧村 穂孝, 中島 浩二, 杉山 雅治, 石川 智仁, 大原 正樹, 加藤 秀実, 井上 明久

    特許第5400194号

    Property Type: Patent

  22. 高強度・高導電性銅合金及びその製造方法

    西田 元紀, 宮川 智, 井上 明久, 加藤 秀実, 西山 信行, 三浦 晴子

    特許第5252722号(P5252722)

    Property Type: Patent

  23. 成形型及びこれを使用して形成される金属ガラス合金製の中間成形体

    土屋 和博, 両角 直一, 正井 智, 加藤 秀実

    特許第5219195号(P5219195)

    Property Type: Patent

  24. 多孔体

    加藤 秀実, 和田 武, 柴田 悦郎, 津田雅史

    Property Type: Patent

  25. ポーラス金属

    加藤秀実, 朱修賢

    Property Type: Patent

  26. 多孔質炭素材料

    加藤 秀実, 津田 雅史, 高野 勇郷, 鈴木 庸介, 茅野 務, 鎌田 晃二, 室中 正太

    Property Type: Patent

  27. カーボンオニオンの製造方法

    加藤 秀実, 津田 雅史, 室中 正太, 高野 勇郷, 鈴木 庸介

    Property Type: Patent

  28. 多孔質シリコン粒子及び多孔質シリコン複合体粒子、並びにこれらの製造方法

    吉田浩一, 三好一富, 久留須一彦, 谷俊夫, 幡谷耕二, 西村健, 加藤秀実, 和田武

    Property Type: Patent

  29. Niを含む合金表面よりNiを除去する表面改質方法とその部材

    加藤秀実, 和田武, 湯葢邦夫, 井上明久

    Property Type: Patent

  30. 非晶質合金の製造方法

    加藤 秀実, 才田 淳治, 井上 明久

    Property Type: Patent

  31. 金属固体同士の接合体の製造方法および複合材料

    加藤秀実, 倉林康太, 大橋勇介

    Property Type: Patent

  32. (仮)金属液体層置換法とその製造品

    加藤秀実, LIU FANGZHOU

    Property Type: Patent

  33. 金属部材の製造方法および金属部材

    和田武, 加藤秀実

    Property Type: Patent

  34. 金属部材の製造方法および金属部材

    和田武, 加藤秀実

    Property Type: Patent

Show all Show first 5

Research Projects 26

  1. オープンナノポーラス金属の開発 Competitive

    2009/04 - Present

  2. Viscoelastic properties of glassy alloy Competitive

    1994/04 - Present

  3. Establishment of Partial Liquid Metal Dealloying for New Nanoporous Alloy Synthesis by Thermodynamic Control of Solid-Liquid Phase Equilibrium

    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

    2023/04/01 - 2026/03/31

  4. 相分離する異種金属のデアロイング接合

    加藤 秀実, 和田 武, 魏 代修

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2021/04/05 - 2025/03/31

  5. Pioneering development of electromagnetic functions in high entropy alloys

    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

    2021/07/09 - 2024/03/31

  6. 金属溶湯脱成分におけるポーラス金属生成機構解明と構造制御法確立

    和田 武, 奥川 将行, 加藤 秀実

    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

    2020/04/01 - 2023/03/31

    More details Close

    R3年度は金属溶湯脱成分におけるポーラス構造粗大化に及ぼす溶湯の物性の影響を実験およびシミュレーションを用いて調べた。リガメントサイズが同じポーラスFe合金をMg、Mg-Ni、Pb浴にそれぞれ同一温度、同一時間浸漬し、浸漬後のリガメントサイズを電子顕微鏡を用いて計測した結果、その粗大化速度はPb、Mg-Ni、Mgの順に早くなることが分かった。なお、粗大化速度の時間依存性から、粗大化機構は全て固液界面に沿った表面拡散と推察された。MDシミュレーションを用いてFe固相をそれぞれの金属浴に浸漬した際のFe固相の表面原子の拡散挙動や金属浴への溶出挙動を調べると、Pb溶中ではFe原子が固相から頻繁にPb浴に溶出する様子が確認され、一方でMg浴中ではそのような挙動は見られなかった。FeとPbは相分離の関係にあり、Pb中のFeの溶解度は無視できるほど小さいことが報告されているが、MDシミュレーションでFe原子がPb金属浴中に頻繁に溶出する挙動が見られたということは、ポーラスFe固相の表面原子はPb金属浴の影響を強く受けていると考えられる。MDシミュレーションから算出したPb浴中でのFeの表面拡散の活性化エネルギーはが3つの金属浴中で最も小さくなっており、Pb浴中ではFe原子の下地バルクとの結合が弱められていることで、Feの表面原子の下地からの束縛が弱まり、Fe原子がリガメントの表面を容易に拡散できるようになった結果、粗大化が他の金属浴に比べて早くなると推察している。

  7. ハイエントロピー合金新学術領域研究の連携的企画運営

    乾 晴行, 尾方 成信, 辻 伸泰, 古原 忠, 小山 敏幸, 加藤 秀実

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 新学術領域研究(研究領域提案型)

    Institution: 京都大学

    2018/06/29 - 2023/03/31

    More details Close

    新学術領域研究「ハイエントロピー合金:元素の多様性と不均一性に基づく新しい材料の学理」を構成する多様な研究者が行う研究を相互に有機的に関連付けて、多様な観点から共同研究を企画・管理することにより、各研究者の研究にさらなる進展とブレークスルーをもたらすとともに、これらの研究成果がハイエントロピー効果という新規な概念のもと、最先端のナノ解析実験研究、最先端計算科学、最先端材料創製研究を融合させて、「未開の多成分系状態図の中央近傍の組成を持つハイエントロピー合金が示す新規で特異な材料物性をハイエントロピー効果と言う新規な概念からその本質を明らかにし、多様な構成元素間の非線形相互作用(カクテル効果)に潜む新たな材料科学の学術領域を打ち立てる」という領域全体の目標に対して最大限の寄与が出来るよう各個別研究および共同研究の方向付けを行っている。具体的には、領域全体の管理運営を行う事務局体制を整備し、領域内の各グループで実施されている研究内容を把握し、異なる背景の研究者間の研究言語を咀嚼、翻訳、統一し、「何が明らかになったのか」また「何を明らかにすべきか」を明確にした上で、総括班会議、領域全体研究会、各研究項目内連携会議、各計画研究班内会議などを企画・組織を通して、構成メンバー全員の共通認識となるようその周知に努めている。また、大型共通設備(SPring-8、J-PARC、金研スーパーコンピューターなど)について利用のための講習会を開催しその利用を支援し、国際活動支援班を設けることにより、国内だけでなく国際的にも各研究グループ間の人材交流についての調整・交渉の窓口を行っている。また、ホームページやシンポジウム、若手の研究会,さらには関連各学会での講演会を企画・運営し、領域の最新研究動向や成果を学界をはじめ広く社会に発信している。

  8. ハイエントロピー効果に基づく新材料創製と新機能創出

    加藤 秀実, 和田 武, 武藤 浩行, 武藤 泉, 西山 宣正

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 新学術領域研究(研究領域提案型)

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2018/06/29 - 2023/03/31

    More details Close

    A01イ班ではハイエントロピー(HE)効果に基づく新材料創製と新機能創出を目的として研究を行っている。本班で推進している5つの研究テーマについて当該年度に得られた成果は下記の通りである。 (1)HE合金のナノ多孔およびナノ複合化:平均リガメントサイズ約10nm, 比表面積55.7 m2/gを具備する Ti13.5V26.0Nb12.3Mo28.8Ta14.6Ni4.8 (at.%) ナノポーラス体の作製に成功した.このポーラス体は58.3 F/gの重量比静電容量を有することを明らかにした。 (2)HE耐食合金設計:CoCrFeMnNi等モル合金においてCrとCoは耐食性を向上させることがわかった.また,Co添加による効果は純Coの電気化学特性からは予測できない.また,Mnは耐酸性と耐孔食性を共に低下させることがわかった.得られた知見に基づき, より高い耐孔食性を有するFe-20Cr-20Ni-20Co-6MoHE合金を作製した. (3)HEセラミックスの超高圧合成:HEセラミックスとして期待できる高圧下で安定なコチュナイト型セラミックスの端成分であるコチュナイト型ジルコニアおよびハフニアを合成し,その力学特性を測定した. (4)HEセラミックスの新規ヘテロ構造化:粉末冶金法を基本としたHEセラミックス(HEOs,HECs)の開発のために,出発原料粒子の集積化技術に関する検討を行った.複数種の粉末から構成される多元系複合顆粒を湿式顆粒法により作製する手法を確立することができた. (5)HE合金のバルク金属ガラス化:センチメートル級のガラス形成能を有するZr基HE金属ガラスを複数見出すことに成功し,ガラス形成能に及ぼすHE効果を考察した.また,開発したHE金属ガラスの粘度測定や比熱測定を行い,HE化が各特性に及ぼす影響を明らかにした.

  9. Control of relaxation state and improvement of ductility in metallic glasses induced by inhomogeneous local non-affine strain

    Saida Junji

    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

    2018/04/01 - 2022/03/31

    More details Close

    We develop a new heating-quenching process above the glass transition temperature and establish a technique for controlling the relaxation state by introducing non-affine strain in metallic glass. In particular, the introduction of the gradient relaxation state distribution in the radial direction of the cylindrical sample announced in 2020 provides a novel material control method that renews the conventional wisdom of metallic glass materials. By such material control, we succeeded in producing a metallic glass showing excellent plastic deformability (toughness). In addition, structural evaluation by molecular dynamics simulations revealed structural changes at the atomic level due to the introduction of non-affine strains, and was able to elucidate the mechanism of relaxation state control and construct the theory.

  10. Mg-希土類結晶および非晶質合金の作製とその力学特性調査

    加藤 秀実, ZHANG DEPING

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    2018/11/09 - 2021/03/31

    More details Close

    金型鋳造Mg-4Sm-xYb-0.6Zn-0.4Zr合金の微細構造と特性に及ぼす異なる含有量の希土類SmとYbの影響を調べた。Ybの添加によって明確な結晶粒微細化が生じた。Ybの含有量が3wt%の場合、平均結晶粒径が23.3μmまで微細化した。Mg-4Sm-xYb-0.6Zn-0.4Zr(x = 0 to 3 wt%)合金は鋳造したままの状態において主に2種類の相から構成されていることが分かった。 1つはデンドライト状のMg24RE5相(FCC構造、格子定数a=1.12 nm)、もう1つは平板状Mg5RE相(FCC構造、a=2.22 nm)であり、これらの二相の配向関係は(200)Mg5RE||(-110-2)Mgおよび、[012]Mg5RE||[-24-23]Mgであった。合金の最適化固溶体プロセスは515℃-4時間から520℃-2時間であった。熱水焼入れ処理によって合金の伸びは大幅に増加したが、降伏強度の減少はわずかであった。200℃で時効すると、Yb添加効果によって析出量が増加するため、合金のピーク時間が短縮された。TEM観察により、ピーク時効状態の析出物は主にβ'相および少量のβ''相であることが明らかになった。1.5%Yb合金を時効することで、市販のWE43合金よりも優れた機械的特性を示した。Ybの含有量が異なるMg-4Sm-xYb-0.6Zn-0.4Zr合金は、鋳造したままおよびピーク時効の両条件下で延性をさほど低下させずに機械的特性を大幅に改善することができた。特にMg-4Sm-3Yb-0.6Zn-0.5Zr合金において最大の破断強度および降伏強度が得られ、それらの値は鋳造したままの状態でそれぞれYb無添加材に比べて約22%と20%増加、ピーク時効状態で18%と19%の増加となった。

  11. Development of high-strength and high high-plastic deformable nanocrystalline/amorphous complex alloys by controlling thier nano-hetero structures

    YAMASAKI Tohru

    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: University of Hyogo

    2017/04/01 - 2021/03/31

    More details Close

    Nanocrystalline and amorphous alloys have exhibited high strength without ductility. This is due to the no-work hardening effects during plastic deformation. In the present study, the eletrodeposited Ni-W alloys and Zr-Cu-Ni-Al based BMG alloys having amorphous and nanocrystalline complex structures have been developed. These alloys have exhibited work hardening due to the stress-induced nanocrystalline grain growth in the amorphous matrix. On the other hands, stress-induced nanocrystalline grain growth has been strongly influenced by the amount of free-volume in the amorphous phase matrix. In the case of the Zr-based bulk metallic glasses, compositional dependence of neutron irradiation embrittlement have been examined. As the results, the neutron irradiation behaviors of the Zr-based BMGs may depend on the amounts of the free volume in the BMGs. There may be upper and lower acceptance limits for moderate amounts of free volume to obtain the ductile metallic glasses.

  12. Effect of current flow on the kinetic of the liquid metal dealloying reaction and its application for nanoprous structural control

    WADA Takeshi

    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

    2015/04/01 - 2018/03/31

    More details Close

    Effects of current flow on the dealloying reaction using liquid medium were studied. When Fe-Ni binary alloy precursor was dealloyed by pure Mg solid, a significant difference on the reaction kinetic was observed, depending on the direction of current flow. That is, a reaction kinetic was accelerated when the current flow is from Fe-Ni precursor to Mg. On the contrary, morphology of the porous metal formed was almost independent on the presence or direction of current flow.

  13. Development of super-high-sensitivity multimodal X-ray imaging

    Yashiro Wataru

    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

    2014/04/01 - 2017/03/31

    More details Close

    The aim of this project is to improve the sensitivity of X-ray grating interferometry by the improvement of the gratings used in the interferometry and the development of novel optical systems. The improvement of the gratings was realized by the development of metallic glass imprinting technique, and 9 μm-pitch Gd-based and 3-μm pitch Pt-based metallic glass gratings were successfully fabricated. In addition, we developed two novel optical systems: X-ray phase elastography and grazing-incidence small-angle X-ray scattering imaging. For the former, we clarified the theoretical background of the effect of unresolvable edges on the images obtained in the interferometry and performed a preliminary experiment at SPring-8. For the latter, we performed experiments of grazing-incidence small-angle X-ray scattering imaging at SPring-8 and successfully obtained contrast due to a line and space pattern with a depth of 10 nm, which is difficult to be resolved in a conventional setup.

  14. Development of open-cell type nanoporous silicon for long lifetime and high capacity lithium secondary battery electrode

    Hidemi Kato

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2013/04/01 - 2017/03/31

    More details Close

    A dealloying in metallic melt, a novel top-down process for preparing nanoporous Si powder was developed. By immersing magnesium-silicon alloy precursor in bismuth metal melt, magnesium selectively dissolved into bismuth melt and the remaining silicon atoms self-organized into an open-cell type nanoporous structure. A lithium secondary battery anode made with the developed nanoporous Si exhibited about 3 times higher capacity than that of graphite anode and extremely long lifetime exceeding 1500 cycles.

  15. Development large-area and high aspect ratio metallic glass gratings for Talbot-Lau interferometer

    KATO Hidemi, YASHIRO Wataru, WADA Takeshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2014/04/01 - 2016/03/31

    More details Close

    Imprinting method for fabricating large-area and high aspect ratio pattern was established for Pd-based metallic glass (MG) with high formability and for Gd-based MG with low formability. Sufficient depth of imprinting can be obtained even under the isothermal heating condition at supercooled liquid region for Pd-based MG, while the high-rate isochronal heating condition above crystallization temperature was needed for Gd-based MG. By using imprinting with optimized conditions, we have successfully prepared gratings which are applicable for X-ray and neutron Talbot-Lau interferometer.

  16. Synthesis of high strength Fe-based bulk hetero metallic glass by self-organization phenomena.

    MAKINO Akihiro, YOKOYAMA Yoshihiko, YUBUTA Kunio, TAKEUCHI Akira, YODOSHI Noriharu, KUBOTA Takeshi, KATO Hidemi

    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

    2011/04/01 - 2015/03/31

    More details Close

    In this study we revealed the nano-hetero-structure and its stabilization mechanism as well as glass forming ability with adding P and Cu elements in FeSiB alloy system. A possibility of the synthesis of ribbon, cast-rod and sintered compacts is also investigated. As a result, we could successfully prepare the (Fe76Si10B8P6)100-XCuX (X=0-0.6) bulk rod-shape sample by a copper mold technique. Powder metallurgical process is also developed for removing the dimensional limitation.

  17. 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

    More details Close

    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.

  18. Preparation and application of nanoporous metals by using dealloying in a metallic melt

    KATO HIDEMI, YUBUTA Kunio, WADA Takeshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2011 - 2013

    More details Close

    Novel method for preparation of open-cell nanoporous base metals by using dealloying reaction in a metallic melt was successfully developed. By immersing an alloy precursor into a metallic melt, specific component was dissolved selectively into a metallic melt and the remaining component self-organized into a nanoporous structure. The analyses on microstructure and compositional changes revealed that the diffusion of solute atom in the metallic melt is a rate limiting step and that the ligament size coarsened for surface relaxation via surface diffusion mechanism. These results indicated that the formation mechanism of nanoporous structure by dealloying in metallic melt is essentially the same with that in aqueous solution.

  19. Intrinsic nanoscale inhomonegeity in metallic glass and its relation to mechanical properties

    KATO Hidemi, WADA Takeshi, ICHITSUBO Tetsu, ABE Eiji

    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

    More details Close

    Strong relationship among fragility (= temperature dependence of viscosity in supercooled liquid state, magnitude of the slow beta relaxation and nanoscale inhomogeneity in metallic glasses is confirmed by investigating relaxation behavior of Pd- and Zr-based alloys. By HAADF-STEM observation, it is newly found that Ar atom can be frozen in weakly bonded region of metallic glass by low energy Ar ion implantation. By analyzing dependence of size and distribution of the frozen Ar nanoparticles on the alloy system and thermal history, we can understand the nanoscale inhomogeneity in metallic glass more clearly.

  20. Fabrication of Bulk Metallic Glasses in Centimeter Class and TheirIndustrialization

    INOUE Akihisa, CHEN Mingwei, TAKEUCHI Akira, KIMURA Hisamichi, ZHANG Wei, LOUZGUINE Dmitri, KATO Hidemi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (S)

    2008 - 2012

    More details Close

    The present study deals with the fundamental and application items. The former includes the fabrication of large-scale bulk metallic glasses (BMGs) with a critical diameter of 1 cm or more and clarifications of local atomic arrangements and mechanisms for various properties, whereas the latter aims to widen the application fields based on the newly-developed large-scale BMGs found in the present study. The purposes of the present study is to establish new base materials used for highly-safety and assured social life based on the items proposed in the present study.

  21. Synthesis and dynamic nano structure change in metallic glasses with stable inhomogeneous local structure

    SAIDA Junji, KATO Hidemi

    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

    More details Close

    We observed that the nucleation mode in supercooled liquid can be controlled by changing atmosphere in the Cu mold casting technique. Zr-based bulk metallic glasses containing Pd or Nb exhibit a good plasticity. It is due to the deformation-induced dynamic nanostructure change. We also investigated that the synergy effect of dynamic nanostructure change and glassy structure control is very important on the improvement of mechanical properties such as plasticity in metallic glasses.

  22. 金属ガラス形成能の低域雰囲気圧力依存性の解明と応用

    加藤 秀実

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特定領域研究

    Category: 特定領域研究

    Institution: 東北大学

    2006 - 2007

    More details Close

    Zr_<65>Al_<7.5>Ni_<10>Cu_<17.5-x>Pd_x(x=0-17.5at%)合金溶湯の銅鋳型鋳造による冷却速度のAr雰囲気圧力(2×10^<-3>〜10^5Pa)依存性について調査した。Tg+160K(Tg:ガラス遷移温度)以下の温度範囲で冷却が鈍る現象がPd量および雰囲気圧力に依存せずに観察された。冷却中にこの温度域で過冷却液体(SCL)表面と鋳型表面の間に空間が形成・成長し、冷却速度が雰囲気ガス種・圧力に大きく依存することを、試料および鋳型表面粗さ観察等によって確認した。溶湯の熱収縮速度に対して粘性流動速度が下回る過冷却液体低温域においてこの空間が形成されるため、この温度域に相変態点を持つ合金のガラス形成能は雰囲気圧力に大きく左右されることになる。連続冷却変態曲線を各Pd量合金で調査したところ、x>5at%以上のPdを含む合金がこれに該当することがわかった。ところで、これらの合金はTg直上に相変態曲線を有するため、変形誘起によってせん断帯内に生じる過冷却液体状態の熱的安定性は極めて小さく、動的ナノ結晶化が生じ易いと予想される。実際に5at%以上のPdを含む合金では、室温圧縮塑性変形量が6-7%に達している一方で、これ以下のPd添加合金では1%程度に留まることがわかった。変形後の前者の試料におけるせん断帯内部を透過型電子顕微鏡で観察したところ、fcc-Zr_2Niナノ結晶によって構成される帯状組織が観測されたが、後者の試料においてはこのような組織は発達していないことが分った。以上より、Tg直上に相変態曲線を有する金属ガラス合金系は、鋳型急冷によるガラス形成能の雰囲気圧力が大きく、室温における塑性変形能も大きいことが明らかになった。

  23. 非ニュートン流動を利用した方位制御バルク状ナノ構造金属ガラス複合材料の創製と性質

    加藤 秀実

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 若手研究(B)

    Category: 若手研究(B)

    Institution: 東北大学

    2003 - 2005

    More details Close

    核生成理論によると、過冷却合金から結晶化に伴う自由エネルギー変化の大きさから、外的静水圧が核生成に影響を及ぼすには、GPaオーダー程の超高圧が必要とされる。このような超高圧を用いない場合、過冷却合金は結晶化によって体積収縮を伴うので、過冷却合金を真空雰囲気で鋳造すると核生成が抑えられる結果、ガラス形成能が高まると考えられてきた。これに対して報告者らはZr-Al-Ni-Cu-(Pd,Pt)系やCu-(Hf,Zr)-Ti系のように、過冷却合金から初晶としてナノ準安定相(特に準結晶相)粒子が多量に均一分散する一部のガラス合金系では、10^<-3>Pa程度の真空圧力において、過冷却合金の核形成が著しく促進されてナノ結晶析出能が増大し、従ってガラス形成能が低下する一方で、大気圧(10^5Pa)中では、これが抑制される結果、合金のガラス形成能が著しく改善する"逆"依存性を非超高圧領域で観測し、世界に先駆けてこれを報告した[H.Kato et al.,Scripta Mater.,51(2004)1063-1068]。この原因・機構を明らかにするには至らなかったが、過冷却合金の鋳造奮雰囲気圧力を制御することによって、ガラス形成能またはナノ結晶形成能を制御できることが明らかとなった。この合金系では、非ニュートン粘性流動中のせん断応力が、合金中の核生成を抑制することが分かっており、静水圧力とせん断応力が結晶化に大きな影響を及ぼすことが本研究成果より明らかとなった。

  24. 安定化過冷却液体を利用したバルク金属ガラス複合材料の創製と性質

    加藤 秀実

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 若手研究(B)

    Category: 若手研究(B)

    Institution: 東北大学

    2001 - 2002

    More details Close

    昨年度の結果として、金属ガラスの過冷却液体状態における非線形粘性流動は、ナノ結晶相の形成・生成を抑制する効果を有することを示し、粘性流動条件が金属ガラスの複合材料化を左右するパラメータと成り得ることを明らかにした。粘性流動を用いた複合材料設計を念頭に、更に詳細に調査したところ、この非線形粘性流動は、相に対して相反する2つの効果を有していることが明らかになった。これは、つまり、応力誘起型Disordering効果と、Friction Lossによる発熱に伴う結晶化促進効果である。前者の例として、Zr基バルクガラス合金の場合、Tg温度では、粘性率を1/10にするのに対して、約500J/molの熱量に相当するDisorderingが行なわれた。また、同材料の発熱に伴う温度上昇は、定常流動応力と歪速度の積に比例することが確認された。よって厳密に言えば、非線形粘性流動が、ナノ結晶化を促進するのか抑制するかを議論する場合、これらの2つの効果のバランスを議論することが必要であることが示されたことになる。今後の展開としては、Friction Lossに伴う発熱量が拡散しやすい変形環境と、拡散しにくい変形環境を構成し、これらの2条件下におけるナノ結晶化挙動の違いを調査する必要があると考えられる。 金属ガラスの安定化冷却液体を利用した粘性流動の非線形化現象の発現は、試料とダイスとの摩擦に伴う応力分布の形成によって、試料内分布を形成していると予想される。このことは、逆にこのような2次的要因を制御すれば試料内のナノ結晶相の形成部位を制御できることを示している。これを明らかにするために、Pd_<40>Ni_<10>Cu_<30>P_<20>バルクガラス合金(円柱状試料,2mm径,4mm長さ)の定クロスヘッド速度変形時に発現するストレスオーバーシュートを、研究代表者らが提案している仮想応力モデルに基づく有限要素解析によって、その流動構造分布の変化を調査した。円柱状試料の場合、応力誘起Disorderingは試料内部から外部に向かって進行し、ストレスピーク時に大きかった緩和時間分布は、定常状態では小さくなっていることが確認できた。

  25. バルク金属ガラス-セラミックス系複合材料の創製と性質

    加藤 秀実

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    1999 - 2000

  26. 金属ガラス粉末の固化成形

    加藤 秀実

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    1998 - 1998

Show all Show first 5

Teaching Experience 10

  1. 応用鋳造工学 Tohoku University

  2. 非平衡物質工学 Tohoku University

  3. 物質・エネルギー特論 Tohoku University

  4. ナノ構造物質工学特論 Tohoku University

  5. 材料科学の最前線 Tohoku University

  6. 医工学基礎 Tohoku University

  7. ナノ構造物質工学特論 Tohoku University

  8. 医工学概論 Tohoku University

  9. 基礎ゼミ Tohoku University

  10. 基礎ゼミ Tohoku University

Show all Show first 5

Social Activities 7

  1. 宮城県白石高校 総合学習「職場訪問」

    2017/08/28 -

    More details Close

    宮城県宮城県白石高校の学生に、金属ガラス・アモルファスの学習提供及び現役大学院生との座談会

  2. 宮城県工業高等学校化学工業科 研究室見学

    2017/06/26 -

    More details Close

    宮城県工業高等学校化学工業科を受入れ、金属の溶解や凝固の学習提供

  3. 東北経済産業局主催 ものづくりイノベーションセミナー

    2016/12/20 -

    More details Close

    ナノポーラス金属の革新的新製造プロセスと題する講演

  4. 山形東桜学館高校体験型学習

    2016/10/05 -

    More details Close

    山形東桜学館高校生の体験型学習を受入れ、金属の溶解や凝固の体験(実験)学習提供

  5. スポンジ状炭素材料 東北大など 大容量蓄電池に道

    2015/12/04 -

  6. 東北大と京大、LIB用ポーラスシリコン粉末を開発ー容量大きく長寿命

    2014/07/15 -

    More details Close

    東北大学金属材料研究所の和田武助教、加藤秀実准教授と京都大学大学院工学研究科の市坪哲准教授らの研究グループは14日、金属液体内で生じる脱成分反応を利用して次世代型リチウムイオン二次電池(LIB)の負極活物質となるポーラスシリコン粉末を開発したと発表した。

  7. 大容量HD高速生産 微細構造作る技術開発

    2013/07/11 -

Show all Show first 5

Media Coverage 5

  1. 鉄とマグネシウム、強固に接合/東北大が基礎研究で成果

    鉄鋼新聞

    2023/04/03

    Type: Newspaper, magazine

  2. 東北大、鉄とマグネシウムの強固な機械接合に成功

    日本経済新聞電子版

    2023/03/31

    Type: Newspaper, magazine

  3. スポンジ状炭素材料 東北大など 大容量蓄電池に道

    日経産業新聞

    2015/12/04

    Type: Newspaper, magazine

  4. 東北大と京大、LIB用ポーラスシリコン粉末を開発ー容量大きく長寿命

    日刊工業新聞

    2014/07/15

    Type: Newspaper, magazine

  5. HD製造、短時間で安価に 先端医療など応用期待 東北大

    2013/07/31

    Type: Newspaper, magazine

    More details Close

    東北大金属材料研究所の加藤秀実准教授(金属ガラス)らの研究グループは、レーザーによって金属ガラスを急速かつ局所的に加熱できる熱転写装置を製作し、ハードディスク(HD)を短時間で安価に製造する技術を開発した。 ノートパソコンに使う直径2.5インチ(約7.5センチ)のHDは従来、1枚の加工に30分かかっていた。新技術で15分の1の40秒に短縮され、消費電力量も20分の1に抑えることができた。 HDは10ナノメートル(ナノは10億分の1)単位の超微細な凹凸パターンが表面に施されている。半導体製造技術に基づく現在の工程では加工に時間が掛かり、熱容量の大きなヒーターを使うため膨張で凸凹パターンが崩れる問題もあった。 グループはレーザーを吸収する性質のある強化ガラスを金型に用い、金属ガラスの薄い膜に凹凸パターンを加工。レーザーで金属ガラスだけが加熱されて水あめの状態に変形し、他の素材は影響を受けず制

Other 7

  1. 無冷却高圧タービン動翼を実現する最先端超高温材料の研究開発

    More details Close

    本事業では、近年東北大で開発されたモリブデン基超高温材料モシブチック(MoSiBTiC)合金(耐熱温度1400℃)の設計思想やノウハウを活かしながら、新規な超高温材料を開発することを目的とする。モシブチック合金の課題であった耐酸化性を改善するために、材料組成の根本的な見直しを行い、モシブチック合金の超高温下における優れた機械的性質を維持しながら、耐酸化性に優れた、全く新しい超高温金属マトリックス複合材料(超高温MMC)の先導研究を行う。

  2. 金属ガラスを用いた超高密度磁気記録媒体作成に係る熱ナノインプリントプロセスの開発

    More details Close

    粘弾性流動加工の基礎評価 インプリント加工条件の最適化

  3. 金属溶湯中での脱成分反応を利用したナノオープンポーラス材料の作製とその蓄電デバイスへの応用

    More details Close

    情報通信機器・家電機器用に留まるLiイオン電池の高性能化が求められている。Liイオン電池の出力密度・エネルギー密度は電極材料に大きく依存し、そのうち負極としてグラファイト系材料が、現在使用されているが、そのエネルギー密度は、理論限界値にまで到達している。このブレークスルーとして、現行の5倍以上の理論放電容量を持つSi系負極材料が注目される。この実用化の大きな障害となっている低サイクル寿命の改善が望まれ、Li吸放出時の体積変化の影響を小さくするSiの“ナノサイズ化”技術が障害克服の鍵となる。本研究事業は、申請者らが独自に考案した新脱成分法によって、ナノオープンポーラスSi材料を負極に提供し、そのポーラス構造の最適化を通して、車載可能な高出力・高容量・高サイクル寿命を有するLiイオン電池を開発することを目的とする。

  4. 有毒元素を含むチタン合金の無毒ナノポーラス表面化技術の確立とその生体材料への応用

    More details Close

    我が国は超高齢社会を迎え、老化に伴う諸器官機能低下や損失による生活障害が今後ますます深刻化し、これらの機能再建は極めて重要な課題となっている。この分野の進展には、医・工間の連携推進が重要であり、医学・生物学を横断する学際的プロジェクトの構築がその解決には必要不可欠である。この中で、歯科インプラント、人工関節、人工骨、脊柱固定・スペーサといった骨の組織と機能を再生・再建する生体材料の開発が強く要求され、その最有力素材として、比強度が高く、耐食性に富み、生体毒性の無いチタンが注目されている。生体材料チタンには、生体骨・歯根材料と同程度への低ヤング率化や、表面の化学的および形態的生体適合化を目的とした合金設計・開発が行われてきた。この中で、チタン-ニッケル合金(ニチノールなど)およびチタン-銅合金(主に歯科用)は優れた機械的特性を有するために生体材料としての利用が検討されているが、含有ニッケルや銅は、生体に対する毒性が懸念される元素であるため、これらを生体内で利用するためには、ニッケルおよび銅の溶出量を低減する工夫・改善が必須である。本申請研究では、独自に考案したポーラス金属作製方法を応用し、これらのチタン合金の表面層において毒性元素であるニッケルもしくは銅のみを選択的に取り除き、かつ、微小空孔を無数に導入することによって、表面層の無毒化、かつ、ポーラス形態化の同時達成を試みる。さらに、チタン-ニッケル合金およびチタン-銅合金の表面に形成したポーラス純チタン層に、ガスプロセスやwetプロセスを利用して骨形成能の向上を目的とした表面改質を施す。作製したチタン合金を擬似生体液浸漬試験、細胞培養試験および動物埋め込み試験によって生体特性を評価し、その結果をポーラス形状、表面改質にフィードバックして最適化することによって、機械的性質および生体特性の両面において優れた性質を発揮するチタン合金を開発し、その作製プロセスを確立する。

  5. 高アスペクト比充填材料によるバルク金属ガラス複合材料(BMGMC)の開発

    More details Close

    本申請事業では、引張・曲げ変形下においても複合効果の得られる高アスペクト比充填材料を用いたBMGMCを開発し、さらにその作製技術を確立することを目的とした。本研究では、BMGの最大の特徴である高強度・低弾性率を最大限に生かすために、Mg-Cu-YやMg-Cu-GdなどのMg基BMGを母相として、 (a)高アスペクト比ポリイミド系超耐熱高分子BMGMC (b)高アスペクト比Tiまたはグラファイト成形体充填BMGMC の開発を行う。

  6. 金属ガラスにおけるナノ構造制御の新展開

    More details Close

    代表的BMGであるZr基合金において、鋳造雰囲気ガス圧力を積極的に制御することによって、凝固形成相をガラスまたはナノ準結晶構造材料に容易に制御できることを発見し、BMGを用いた材料開発に大きな展開を与えた (H. Kato et al., Appl. Phys. Lett., 85(2004)2205および Scripta Mater., 51(2004)1063)。このようなナノ組織制御は、過冷却液体において降温に伴って体積収縮と粘性流動による形状回復の競合が起こることで、その低温度域で凝固体と鋳型表面間にキャビティが安定成長を開始するため、キャビティ内のガス状態による冷却速度の差異が生じることで達成できていると考察している。熱伝導物理、計算シミュレーションおよび局所構造解析等の種々の観点から学際的に検討し、メカニズムの解明を行うことを目的としている。

  7. 大学教育の国際化推進プログラム

    More details Close

    本派遣事業は東北大学工学部、又は大学院工学研究科教育改革の一環として実施するものであり,得られた成果は帰国後,同大学工学部・工学研究科内の教育推進室や全学の高等教育開発推進センターにおいて,新たな教育改革の提言としてまとめ,本学の教育改革事業に資することを目的にする。具体的な改革の取り組みとして本派遣事業が扱う内容は、本学学部教育における・国際研究のカリキュラムの導入化・学際研究のカリキュラムの導入化の可能性・有効性を評価するために、先進教育・研究大学に赴きその実態を調査することである。

Show all Show first 5