Details of the Researcher

PHOTO

Rui Yamada
Section
Institute for Materials Research
Job title
Assistant Professor
Degree
  • 博士(工学)(東北大学)

  • 修士(工学)(東北大学)

e-Rad No.
40706892

Committee Memberships 1

  • 日本材料学会 金属ガラス部門委員会 庶務幹事

    2022/04 - Present

Professional Memberships 5

  • 軽金属学会

  • 日本鉄鋼協会

  • 粉体粉末冶金協会

  • 日本材料学会

  • 日本金属学会

Research Interests 2

  • 非晶質材料

  • 金属ガラス

Research Areas 1

  • Nanotechnology/Materials / Material fabrication and microstructure control /

Awards 7

  1. The Young Scientist Awards 2024

    2024/08 Nano Korea

  2. 令和元年度トーキン財団奨励賞

    2020/03 トーキン科学技術振興財団 高圧熱処理を通じたランダム構造制御による新規金属ガラスの創製

  3. 優秀論文賞

    2019/12 日本材料学会 金属ガラス部門委員会 Rejuvenation Behavior and New Clasification of β-relaxation Region in Pd-based Metallic Glass

  4. 第28回日本金属学会若手講演論文賞

    2018/03 日本金属学会 Crystallization Behavior of Thermally Rejuvenated Zr50Cu40Al10 Metallic Glass

  5. 平成26年度日本材料学会金属ガラス部門委員会 優秀研究発表賞

    2013/11 日本材料学会 金属ガラス部門委員会 新規金属ガラスマイクロ部品作製法の提案及びFe系金属ガラスマイクロギアの作製

  6. 卓越補助金に係る成果報告会 poster award

    2013/03

  7. 2010 Joint Symposium on the Materials Science and Engineering for the 21st Century (KAIST) poster award

    2010/06

Show all ︎Show 5

Papers 49

  1. Amorphization process of two-phase Ni30Zr70 alloy by high-energy heavy ion irradiation Peer-reviewed

    565 165732 2025/08

  2. Grating patterns with high aspect ratios created on the surface of Pd-based metallic glass by thermal imprinting Peer-reviewed

    Rui Yamada, Ninshu Ma, Hidemi Kato

    Journal of Alloys and Compounds 1024 180001 2025/04

  3. 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 108589 2025/02

    DOI: 10.1016/j.intermet.2024.108589  

    ISSN: 0966-9795

  4. Creation of a 3D Glassy State by Thermal Gradient Treatment in a Monolithic Metallic Glass Peer-reviewed

    Rui Yamada, Ryu Wook Ha, Haruka Isano, Tomohiro Yoshikawa, Junji Saida

    Advanced Engineering Materials 26 2401517 2024/11

    Publisher: Wiley

    DOI: 10.1002/adem.202401517  

    ISSN: 1438-1656

    eISSN: 1527-2648

    More details Close

    In the present article, the creation of a 3D glassy state by gradient thermal history distributed in a monolithic Zr50Cu40Al10 metallic glass using the proposed thermal gradient treatment is discussed. In this thermal method, a rod sample is annealed while sandwiched between BeCu25 jigs and cooled down by tilting contact against a liquid nitrogen‐cooled Cu mesh. This allows one side of the edge of the rod sample to cool down rapidly from the supercooled liquid region and introduce a temperature/cooling rate difference in 3D in a single process. Specific heat measurement, indentation test and evaluation of incubation time for crystallization reveal creation of 3D gradients throughout the whole sample. In the present study, a new technique of creating a 3D heterogeneity of glassy state to the desired distribution by gradient thermal history in metallic glasses will be promoted, and the development of functionally graded monolithic bulk metallic glasses will be encouraged in near future.

  5. 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 173857 2024/05/05

    DOI: 10.1016/j.jallcom.2024.173857  

    ISSN: 0925-8388

  6. High entropy Fe–Mn–Ni–Co–Al–C alloys from an industrial steel Peer-reviewed

    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

  7. Sustainable steady-state serrated flow induced by modulating deformation sequence in bulk metallic glass Peer-reviewed

    Wook Ha Ryu, Won-Seok Ko, Haruka Isano, Rui Yamada, Hehsang Ahn, Geun Hee Yoo, Kook Noh Yoon, Eun Soo Park, Junji Saida

    Journal of Alloys and Compounds 946 169308-169308 2023/06

    Publisher: Elsevier BV

    DOI: 10.1016/j.jallcom.2023.169308  

    ISSN: 0925-8388

  8. Synthesis and mechanical properties of highly structure-controlled Zr-based metallic glasses by thermal rejuvenation technique Peer-reviewed

    Wei Guo, Tomoaki Niiyama, Rui Yamada, Masato Wakeda, Junji Saida

    Journal of Physics: Condensed Matter 35 154004 2023/02/02

    Publisher: IOP Publishing

    DOI: 10.1088/1361-648x/acb8a0  

    ISSN: 0953-8984

    eISSN: 1361-648X

    More details Close

    Abstract A novel thermal rejuvenation treatment facility for Zr-based bulk metallic glass (BMG) was developed, consisting of a rapid heating and indirect liquid nitrogen quenching process. The re-introduction of free volume into thermally rejuvenated BMG results in more disordered state. The rejuvenation improves ductility, implying that the re-introduced free volume aids in the recovery of the shear transformation zone (STZ) site and volume. Actually, it is confirmed that relaxation significantly reduces STZ volume; however, it is recovered by thermal rejuvenation. Molecular dynamics (MD) simulations also indicate that rejuvenation enhances homogeneous deformation. The current findings indicate that the thermal rejuvenation method is extremely effective for recovering or improving the ductility of metallic glass that has been lost due to relaxation.

  9. Atomic-level characterization of free volume in the structure of Cu67Zr33 amorphous alloy Peer-reviewed

    K Itoh, R Yamada, J Saida, K Ikeda, T Otomo

    Journal of Physics: Condensed Matter 33 (27) 274001 2021/07/07

    Publisher: {IOP} Publishing

    DOI: 10.1088/1361-648X/abfc12  

    ISSN: 0953-8984

    eISSN: 1361-648X

  10. Continuous measurement of ultrasonic elastic wave velocities, X-ray radiography and X-ray diffraction of Zr50Cu40Al10 metallic glass at high pressure and high temperature conditions Peer-reviewed

    Yoshio Kono, Yuji Higo, Steeve Gréaux, Yuki Shibazaki, Rui Yamada, Hideharu Kuwahara, Nozomi Kondo

    High Pressure Research 1-14 2021/06

    Publisher: Informa UK Limited

    DOI: 10.1080/08957959.2021.1941000  

    ISSN: 0895-7959

    eISSN: 1477-2299

  11. High-pressure annealing driven nanocrystal formation in Zr50Cu40Al10 metallic glass and strength increase Peer-reviewed

    Yuki Shibazaki, Rui Yamada, Junji Saida, Yoshio Kono, Masato Wakeda, Keiji Itoh, Masahiko Nishijima, Koji Kimoto

    Communications Materials 1 (1) 2020/12

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s43246-020-00057-3  

    eISSN: 2662-4443

    More details Close

    <title>Abstract</title>Pressure-induced structural changes in metallic glasses have been of great interest as they are expected to open new ways to synthesize novel materials with unexpected properties. Here, we investigated the effect of simultaneous high-pressure and high-temperature treatment on the structure and properties of a Zr50Cu40Al10 metallic glass by in situ X-ray structure measurement and property analysis of the final material. We found the unusual formation of Cu-rich nanocrystals at high pressure and temperature, accompanied by significant strength and hardness enhancement. Based on reverse Monte Carlo modeling and molecular dynamics simulations, the structure of the metallic glass changed to a densely packed, chemically uniform configuration with high short-range and medium-range ordering at high pressure and temperature. These results show that high-pressure annealing processes provide a new way to improve and control properties without changing their composition.

  12. Tailored hardening of ZrCuAl bulk metallic glass induced by 2D gradient rejuvenation Peer-reviewed

    Wookha Ryu, Rui Yamada, Junji Saida

    NPG Asia Materials 12 (1) 2020/12

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41427-020-0233-8  

    ISSN: 1884-4049

    eISSN: 1884-4057

  13. Breakdown of One-to-One Correspondence in Energy and Volume in a High-Pressure Heat-Treated Zr-Based Metallic Glass During Annealing Peer-reviewed

    Rui Yamada, Yuki Shibazaki, Yasuto Abe, Wookha Ryu, Junji Saida

    Scientific Reports 10 (1) 2020/12

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41598-020-64442-1  

    eISSN: 2045-2322

  14. Uniformity of the glassy state of iron-based metallic glassy particles and reproducibility of fabricating microparts Peer-reviewed

    Rui Yamada, Noriharu Yodoshi, Naoyuki Nomura, Junji Saida, Akira Kawasaki

    Materials and Design 191 (108667) 2020

    DOI: 10.1016/j.matdes.2020.108667  

    ISSN: 0264-1275

    eISSN: 1873-4197

  15. The effect of thermal cycling on the fracture toughness of metallic glasses Peer-reviewed

    Jittisa Ketkaew, Rui Yamada, Hui Wang, Derek Kuldinow, Benjamin Sol Schroers, Wojciech Dmowski, Takeshi Egami, Jan Schroers

    Acta Materialia 184 100-108 2020

  16. Rejuvenation Behavior and New Classification of β-relaxation Region in Pd-based Metallic Glass Peer-reviewed

    Rui Yamada, Naoyuki Tanaka, Wei Guo, Junji Saida

    Journal of the Society of Materials Science, Japan 68 (3) 191-198 2019

  17. Thermal Rejuvenation in Metallic Glasses Peer-reviewed

    Junji SAIDA, Rui YAMADA, Masato WAKEDA

    Journal of the Society of Materials Science, Japan 68 (3) 185-190 2019

  18. Unveiling a new type of ultradense anomalous metallic glass with improved strength and ductility through a high-pressure heat treatment Peer-reviewed

    Rui Yamada, Yuki Shibazaki, Yasuto Abe, Wookha Ryu, Junji Saida

    NPG Asia Materials 11 (1) 72 2019

    Publisher: Springer Science and Business Media LLC

    DOI: 10.1038/s41427-019-0175-1  

    ISSN: 1884-4049

    eISSN: 1884-4057

    More details Close

    <title>Abstract</title>An anomalous glass was discovered through high-pressure heat treatment (5.5 GPa at 850 K) followed by rapid cooling of a Zr50Cu40Al10 metallic glass. Despite a reduction in the crystallization temperature and enthalpy, high-resolution transmission electron microscopy analysis revealed that the collected bulk sample maintained a fully amorphous structure. The density of the sample was 0.6% larger than that of the as-cast state and was even larger than that of the partially crystallized state. These results suggest the formation of an ultradense packing glass that cannot be obtained through conventional annealing. Compression test results indicated a significant increase in the Young’s modulus and fracture strength, supporting the creation of an anomalous metallic glass. In addition, plasticity was observed in the treated sample. It was therefore concluded that the high-pressure heat treatment enabled the creation of a new type of glass that is normally overshadowed by the crystallized phase at atmospheric pressure. We explained the creation of the ultradense glass by introducing a pressure parameter (<italic>P</italic>) to the conventional volume (<italic>v</italic>) - temperature (<italic>T</italic>) diagram.

  19. Various rejuvenation behaviors of Zr-based metallic glass by cryogenic cycling treatment with different casting temperatures. Peer-reviewed

    W. Guo, R. Yamada, J. Saida, S. Lü, S. Wu

    Nanoscale Research Letters 13 398 2018/12

    DOI: 10.1186/s11671-018-2816-7  

  20. Rejuvenation and plasticization of metallic glass by deep cryogenic cycling treatment Peer-reviewed

    Wei Guo, Rui Yamada, Junji Saida

    Intermetallics 93 141-147 2018/02/01

    Publisher: Elsevier Ltd

    DOI: 10.1016/j.intermet.2017.11.015  

    ISSN: 0966-9795

  21. Fabrication of optical gratings through surface patterning of zirconium-based metallic glass by laser irradiation Peer-reviewed

    Rui Yamada, Naoyuki Nomura, Junji Saida, Akira Kawasaki

    Intermetallics 93 377-382 2018/02/01

    Publisher: Elsevier Ltd

    DOI: 10.1016/j.intermet.2017.11.003  

    ISSN: 0966-9795

  22. Mechanical glass transition revealed by the fracture toughness of metallic glasses Peer-reviewed

    J. Ketkaew, W. Chen, H. Wang, A. Datye, M. Fan, G. Pereira, UD. Schwarz, Z. Liu, R. Yamada, W. Dmowski, MD. Shattuck, CS. O'Hern, T. Egami, E. Bouchbinder, J. Schroers

    Nature Communications 9 (1) 3271 2018

  23. Thermal rejuvenation of a heterogeneous metallic glass Peer-reviewed

    Wei Guo, Rui Yamada, Junji Saida, Shulin Lu, Shusen Wu

    Journal of Non-Crystalline Solids 498 (15) 8-13 2018

  24. Effects of nanocrystallisation on saturation magnetisation of amorphous Fe76Si9B10P5 Peer-reviewed

    Noriharu Yodoshi, Shunpei Ookawa, Rui Yamada, Naoyuki Nomura, Keiko Kikuchi, Akira Kawasaki

    MATERIALS RESEARCH LETTERS 6 (1) 100-105 2018

    DOI: 10.1080/21663831.2017.1398191  

    ISSN: 2166-3831

  25. Selective oxidation/crystallization and their patterning on metallic glass by laser irradiation Peer-reviewed

    Rui Yamada, Naoyuki Nomura, Junji Saida, Akira Kawasaki

    JOURNAL OF ALLOYS AND COMPOUNDS 727 (15) 549-554 2017/12

    DOI: 10.1016/j.jallcom.2017.08.202  

    ISSN: 0925-8388

    eISSN: 1873-4669

  26. Unusual plasticization for structural relaxed bulk metallic glass Peer-reviewed

    Wei Guo, Rui Yamada, Junji Saida

    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 699 81-87 2017/06

    DOI: 10.1016/j.msea.2017.05.083  

    ISSN: 0921-5093

    eISSN: 1873-4936

  27. Characterization of nano-quasicrystal-formation in correlation to the local structure in Zr-based metallic glasses containing Pd Peer-reviewed

    Junji Saida, Rui Yamada, Pawel Kozikowski, Muneyuki Imafuku, Shigeo Sato, Masato Ohnuma

    JOURNAL OF ALLOYS AND COMPOUNDS 707 46-50 2017/06

    DOI: 10.1016/j.jallcom.2016.10.270  

    ISSN: 0925-8388

    eISSN: 1873-4669

  28. 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

  29. Thermal rejuvenation in metallic glasses Peer-reviewed

    Junji Saida, Rui Yamada, Masato Wakeda, Shigenobu Ogata

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 18 (1) 152-162 2017

    DOI: 10.1080/14686996.2017.1280369  

    ISSN: 1468-6996

    eISSN: 1878-5514

  30. Crystallization Behavior of Thermally Rejuvenated Zr50Cu40Al10 Metallic Glass Peer-reviewed

    Rui Yamada, Naoyuki Tanaka, Wei Guo, Junji Saida

    MATERIALS TRANSACTIONS 58 (10) 1463-1468 2017

    DOI: 10.2320/matertrans.MAW201703  

    ISSN: 1345-9678

    eISSN: 1347-5320

  31. Temperature dependency of viscosity of Fe76Si9B10P5 supercooled liquid and hetero-amorphous structure Peer-reviewed

    N. Yodoshi, S. Ookawa, R. Yamada, A. Kawasaki, A. Makino

    JOURNAL OF ALLOYS AND COMPOUNDS 679 164-168 2016/09

    DOI: 10.1016/j.jallcom.2016.04.032  

    ISSN: 0925-8388

    eISSN: 1873-4669

  32. Investigation of Elastic Deformation Mechanism in As-Cast and Annealed Eutectic and Hypoeutectic Zr-Cu-Al Metallic Glasses by Multiscale Strain Analysis Peer-reviewed

    Hiroshi Suzuki, Rui Yamada, Shinki Tsubaki, Muneyuki Imafuku, Shigeo Sato, Tetsu Watanuki, Akihiko Machida, Junji Saida

    METALS 6 (1) 2016/01

    DOI: 10.3390/met6010012  

    ISSN: 2075-4701

  33. Micro Viscous Flow Processing of Iron-based Metallic Glasses Peer-reviewed

    Yodoshi Noriharu, Yamada Rui, Kawasaki Akira

    Materia Japan 55 (4) 152-159 2016

    Publisher: The Japan Institute of Metals and Materials

    DOI: 10.2320/materia.55.152  

    ISSN: 1340-2625

  34. Evaluation of critical cooling rate of Fe76Si9B10P5 metallic glass by containerless solidification process Peer-reviewed

    N. Yodoshi, R. Yamada, A. Kawasaki, A. Makino

    JOURNAL OF ALLOYS AND COMPOUNDS 643 S2-S7 2015/09

    DOI: 10.1016/j.jallcom.2015.04.088  

    ISSN: 0925-8388

    eISSN: 1873-4669

  35. Stress relaxation behavior of Fe-Co-Si-B-Nb metallic glassy alloys in their supercooled-liquid state Peer-reviewed

    N. Yodoshi, R. Yamada, A. Kawasaki, A. Makino

    JOURNAL OF ALLOYS AND COMPOUNDS 612 (5) 243-251 2014/11

    DOI: 10.1016/j.jallcom.2014.05.006  

    ISSN: 0925-8388

    eISSN: 1873-4669

  36. Interface observation of iron based metallic glassy powder in pressurized liquid phase sintered compaction Peer-reviewed

    N. Yodoshi, R. Yamada, A. Kawasaki, A. Makino

    Euro PM 2014 Congress and Exhibition, Proceedings 2014

  37. Micro viscous flow processing of Fe-based metallic glassy particles Peer-reviewed

    Noriharu Yodoshi, Rui Yamada, Akira Kawasaki, Akihiro Makino

    Journal of Alloys and Compounds 615 (5) S61-S66 2014

  38. Novel Fabrication Process of Micro Components by Viscous Flowing of Iron Based Metallic Glassy Monodispersed Particles Peer-reviewed

    YAMADA Rui, YODOSHI Noriharu, KAWASAKI Akira

    Tetsu-to-Hagane 100 (8) 1006-1013 2014

  39. Recovery of less relaxed state in Zr-Al-Ni- Cu bulk metallic glass annealed above glass transition temperature Peer-reviewed

    Junji Saida, Rui Yamada, Masato Wakeda

    APPLIED PHYSICS LETTERS 103 (22) 2013/11

    DOI: 10.1063/1.4835076  

    ISSN: 0003-6951

    eISSN: 1077-3118

  40. Pressurized liquid phase sintering of iron based metallic glassy powder with Al-Cu eutectic alloy Peer-reviewed

    N. Yodoshi, R. Yamada, A. Kawasaki, A. Makino

    International Powder Metallurgy Congress and Exhibition, Euro PM 2013 2013

  41. Effects of Cooling Rates and Container Walls in Preparation of Spherical Fe and Pd Based Metallic Glassy Particles Peer-reviewed

    Rui Yamada, Noriharu Yodoshi, Akira Kawasaki

    JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS 77 (4) 139-146 2013

    DOI: 10.2320/jinstmet.77.139  

    ISSN: 0021-4876

    eISSN: 1880-6880

  42. Evaluation of viscosity for Fe-based metallic glass in the supercooled liquid region by a single-particle compressive test Peer-reviewed

    N. Yodoshi, R. Yamada, A. Kawasaki, R. Watanabe

    SCRIPTA MATERIALIA 67 (12) 971-974 2012/12

    DOI: 10.1016/j.scriptamat.2012.08.034  

    ISSN: 1359-6462

  43. Critical Cooling Rates of Mono-Sized Fe-Based Glassy Particles in [(FeXCo1-X)(0.75)B0.2Si0.05](96)Nb-4 System Peer-reviewed

    Masahiro Fukue, Noriharu Yodoshi, Rui Yamada, Akira Kawasaki

    JOURNAL OF THE JAPAN INSTITUTE OF METALS 76 (10) 573-578 2012/10

    DOI: 10.2320/jinstmet.76.573  

    ISSN: 0021-4876

    eISSN: 1880-6880

  44. Consolidation of Fe-Based Metallic Glassy Powder by Pressure Infiltration and Squeezing Liquid Phase Sintering Peer-reviewed

    Naohito Morita, Noriharu Yodoshi, Rui Yamada, Akira Kawasaki

    JOURNAL OF THE JAPAN INSTITUTE OF METALS 76 (12) 653-660 2012

    DOI: 10.2320/jinstmet.76.653  

    ISSN: 0021-4876

    eISSN: 1880-6880

  45. Synthesis of Fe Based Metallic Glass-Pd Based Metallic Glass Composite by Slightly Pressured Liquid Phase Sintering Peer-reviewed

    N. Yodoshi, R. Yamada, N. Morita, A. Kawasaki, R. Watanabe

    MATERIALS TRANSACTIONS 51 (11) 2056-2062 2010/11

    DOI: 10.2320/matertrans.M2010197  

    ISSN: 1345-9678

    eISSN: 1347-5320

  46. 単粒子圧縮試験によるFe系金属ガラスの粘性率測定およびその温度依存性 Peer-reviewed

    山田類, 吉年規治, 川崎亮

    傾斜機能材料論文集 24 23-28 2010

  47. Consolidation of [(Fe0.5Co0.5)(0.75)Si0.05B0.2](96)Nb-4 Metallic Glassy Powder by SPS Method Peer-reviewed

    N. Yodoshi, R. Yamada, A. Kawasaki, R. Watanabe

    MATERIALS TRANSACTIONS 50 (9) 2264-2269 2009/09

    DOI: 10.2320/matertrans.M2009093  

    ISSN: 1345-9678

    eISSN: 1347-5320

  48. Synthesis of Fe Based Metallic Glass-Pd Based Metallic Glass Composite by Slightly Pressured Liquid Phase Sintering Peer-reviewed

    Noriharu Yodoshi, Naohito Morita, Rui Yamada, Akira Kawasaki, Ryuzo Watanabe

    JOURNAL OF THE JAPAN INSTITUTE OF METALS 73 (8) 643-650 2009/08

    DOI: 10.2320/jinstmet.73.643  

    ISSN: 0021-4876

    eISSN: 1880-6880

  49. Consolidation of Fe-Co Based Metallic Glassy Powder by SPS Method Peer-reviewed

    Rui Yamada, Noriharu Yodoshi, Akira Kawasaki, Ryuzo Watanabe

    JOURNAL OF THE JAPAN INSTITUTE OF METALS 73 (4) 299-305 2009/04

    DOI: 10.2320/jinstmet.73.299  

    ISSN: 0021-4876

    eISSN: 1880-6880

Show all ︎Show first 5

Misc. 51

  1. 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

  2. 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

  3. Improved Mechanical Properties of Metallic Glass by 2D Gradient Rejuvenation

    Wookha RYU, Haruka ISANO, Tomohiro YOSHIKAWA, Rui YAMADA, Junji SAIDA

    Journal of the Japan Society of Powder and Powder Metallurgy 69 (5) 177-184 2022/05/15

    Publisher: Japan Society of Powder and Powder Metallurgy

    DOI: 10.2497/jjspm.69.177  

    ISSN: 0532-8799

    eISSN: 1880-9014

  4. 球形金属ガラス粒子の粘性流動成形加工によるマイクロダイヤフラムの作製

    吉年規治, 山田類, 伊佐野はる香, 菊池圭子, 野村直之, 川崎亮

    粉体粉末冶金協会講演大会(Web) 2019 2019

  5. 単粒子圧縮試験法によるFe系金属ガラス過冷却液体の粘性係数測定とその組成依存性

    吉年規治, 青柳慶真, 山田類, 菊池圭子, 野村直之, 川崎亮

    日本金属学会講演概要(CD-ROM) 164th 2019

    ISSN: 2433-3093

  6. Pd系金属ガラス粒子を用いた粘性流動成形加工による微小部品の作製

    吉年規治, 山田類, 伊佐野はる香, 野村直之, 菊池圭子, 川崎亮

    材料とプロセス(CD-ROM) 32 (2) 2019

    ISSN: 1882-8922

  7. Fe系非晶質単粒子のナノ組織制御と磁気特性評価

    峯岸剛太, 菊池圭子, 野村直之, 川崎亮, 山田類, 吉年規治

    粉体粉末冶金協会講演大会(Web) 2018 ROMBUNNO.1‐19A (WEB ONLY) 2018

  8. 鉄系金属ガラス粒子マイクロ鍛造加工の粘弾性解析

    品川一成, 吉年規治, 山田類, 川崎亮

    材料とプロセス(CD-ROM) 30 (2) ROMBUNNO.218 2017/08/21

    ISSN: 1882-8922

  9. Fe‐Si‐B‐P‐(Cu)系急冷単分散粒子のナノ結晶化挙動と磁気特性

    吉年規治, 山田類, 大川舜平, 野村直之, 菊池圭子, 川崎亮

    材料とプロセス(CD-ROM) 30 (2) ROMBUNNO.217 2017/08/21

    ISSN: 1882-8922

  10. FeCoSiBPアモルファス単粒子のナノ結晶化と磁気特性評価

    吉年規治, 山田類, 峯岸剛太, 菊池圭子, 野村直之, 川崎亮

    粉体粉末冶金協会講演概要集 2017 91 2017/05/31

  11. FeCoSiBNb系単分散粒子の過冷却液体の粘性係数とその組成依存性

    青柳慶真, 菊池圭子, 野村直之, 川崎亮, 山田類, 吉年規治

    粉体粉末冶金協会講演概要集 2016 160 2016/11/09

  12. FeSiBP系単分散粒子の磁気特性とその組成依存性

    大川舜平, 菊池圭子, 野村直之, 川崎亮, 山田類, 吉年規治, 牧野彰宏

    粉体粉末冶金協会講演概要集 2016 92 2016/11/09

  13. Fe76Si9B10P5金属ガラス単分散粒子の粘性流動特性および磁気特性

    吉年規治, 山田類, 大川舜平, 野村直之, 菊池圭子, 川崎亮

    材料とプロセス(CD-ROM) 29 (2) ROMBUNNO.153 2016/09/01

    ISSN: 1882-8922

  14. 粘性流動を利用したFe系金属ガラスマイクロギアの創製プロセスの検討

    山田類, 吉年規治, 川崎亮

    材料とプロセス(CD-ROM) 29 (2) ROMBUNNO.154 2016/09/01

    ISSN: 1882-8922

  15. FeSiBP系アモルファス単分散粒子のナノ結晶化挙動と磁気特性評価

    大川舜平, 川崎亮, 山田類, 吉年規治, 牧野彰宏

    粉体粉末冶金協会講演概要集 2016 189 2016/05/24

  16. FeSiBP(Cu)アモルファス単分散粒子の結晶化挙動と磁気特性評価

    大川舜平, 川崎亮, 山田類, 吉年規治, 牧野彰宏

    粉体粉末冶金協会講演概要集 2015 45 2015/11/11

  17. Fe76Si9B10P5金属ガラスの粘性係数の温度依存性

    吉年規治, 牧野彰宏, 山田類, 大川舜平, 川崎亮

    粉体粉末冶金協会講演概要集 2015 46 2015/11/11

  18. Fe76Si9B10P5単分散金属ガラス粒子作製と臨界冷却速度

    吉年規治, 牧野彰宏, 山田類, 川崎亮

    材料とプロセス(CD-ROM) 28 (2) ROMBUNNO.185 2015/09/01

    ISSN: 1882-8922

  19. 無容器凝固プロセスによるFe76Si9B10P5のガラス形成能評価と臨界冷却速度

    吉年規治, 山田類, 川崎亮, 牧野彰宏

    粉体粉末冶金協会講演概要集 2014 105 2014/10/29

  20. 微小球形粒子を用いたFe系金属ガラスマイクロ部品の創製

    山田類, 才田淳治, 吉年規治, 川崎亮

    日本金属学会講演概要(CD-ROM) 154th ROMBUNNO.419 2014/03/07

    ISSN: 1342-5730

  21. 新規金属ガラスマイクロ部品作製法の提案及びFe系金属ガラスマイクロギアの作製

    山田類, 吉年規治, 才田淳治, 川崎亮

    日本学術会議材料工学連合講演会講演論文集 57th 248 2013/11/25

  22. 鉄系金属ガラス単分散液滴のin‐situ接合

    吉年規治, 牧野彰宏, 佐賀麻理, 山田類, 川崎亮

    粉体粉末冶金協会講演概要集 2013 131 2013/05/27

  23. 単粒子圧縮試験によるFe系金属ガラスの応力緩和挙動および緩和機構の検討

    山田類, 藤井大之, 吉年規治, 川崎亮

    日本金属学会講演概要(CD-ROM) 152nd ROMBUNNO.501 2013/03/13

    ISSN: 1342-5730

  24. Fe系非晶質粉末の液相焼結

    吉年規治, 牧野彰宏, 山田類, 川崎亮

    粉体粉末冶金協会講演概要集 2012 57 2012/11/20

  25. Critical Cooling Rates of Mono-Sized Fe-Based Glassy Particles in [(Fe_XCo_<1-X>)_<0.75>B_<0.2>Si_<0.05>]_<96>Nb_4 System

    FUKUE Masahiro, YODOSHI Noriharu, YAMADA Rui, KAWASAKI Akira

    76 (10) 573-578 2012/10/01

    Publisher: 日本金属学会 ; 1937-

    ISSN: 0021-4876

  26. 鉄系金属ガラス単分散粒子のマイクロ粘性流動加工

    吉年規治, 山田類, 川崎亮

    材料とプロセス(CD-ROM) 25 (2) ROMBUNNO.218 2012/09/01

    ISSN: 1882-8922

  27. Fe系金属ガラスの応力緩和挙動ならびに粘性流動加工時の最適な加工条件の検討

    山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2012 101 2012/05/22

  28. Fe系金属ガラス単分散液滴のin‐situ接合

    佐賀麻理, 山田類, 吉年規治, 川崎亮

    日本金属学会東北支部研究発表大会予稿集 11th 6 2012

  29. Fe系金属ガラス過冷却液体の応力緩和挙動

    藤井大之, 山田類, 吉年規治, 川崎亮

    日本金属学会東北支部研究発表大会予稿集 11th 7 2012

  30. Fe系金属ガラス無容器凝固液滴のin‐situ接合

    吉年規治, 福江正浩, 山田類, 川崎亮

    日本金属学会講演概要(CD-ROM) 149th ROMBUNNO.9 2011/10/20

    ISSN: 1342-5730

  31. 単粒子圧縮試験法によるFe系金属ガラスの応力緩和挙動の検討

    山田類, 吉年規治, 川崎亮

    日本金属学会講演概要(CD-ROM) 149th ROMBUNNO.14 2011/10/20

    ISSN: 1342-5730

  32. Fe系金属ガラスにおける粘性流動加工が結晶化に及ぼす影響

    寺島寛人, 山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2011 41 2011/05/30

  33. Fe系金属ガラス粒子のマイクロ粘性流動加工

    吉年規治, 川崎亮, 山田類

    粉体粉末冶金協会講演概要集 2011 166 2011/05/30

  34. 単粒子圧縮試験法によるFe系金属ガラスの応力緩和挙動の検討

    山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2011 39 2011/05/30

  35. 単粒子圧縮試験法によるFe系金属ガラスの応力緩和時間測定及び粘性率の検討

    山田類, 吉年規治, 川崎亮

    日本金属学会講演概要 148th 268 2011/04/20

    ISSN: 1342-5730

  36. 無容器凝固法により得られたFe系金属ガラス粒子の粘性流動加工及び結晶化挙動

    吉年規治, 山田類, 川崎亮

    日本金属学会講演概要 148th 268 2011/04/20

    ISSN: 1342-5730

  37. Fe系金属ガラス単分散粒子のマイクロ粘性流動と結晶化挙動

    寺島寛人, 山田類, 吉年規治, 川崎亮

    日本金属学会東北支部研究発表大会予稿集 10th 6 2011

  38. 球形単分散金属ガラス微粒子を用いたマイクロ粘性流動加工

    吉年規治, 川崎亮, 山田類

    粉体粉末冶金協会講演概要集 2010 243 2010/11/09

  39. Fe系金属ガラスにおける粘性流動加工が結晶化に及ぼす影響

    米山太基, 寺島寛人, 山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2010 241 2010/11/09

  40. 単粒子圧縮試験におけるFe系金属ガラス粒子の応力緩和挙動と粘性係数の関係

    山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2010 242 2010/11/09

  41. Fe系金属ガラスにおける粘性流動加工が及ぼす結晶化への影響

    吉年規治, 山田類, 川崎亮

    日本金属学会講演概要 147th 453 2010/09/25

    ISSN: 1342-5730

  42. 単粒子圧縮試験法によるFe系金属ガラスの粘性率測定およびその温度依存性

    山田類, 吉年規治, 川崎亮

    日本金属学会講演概要 147th 453 2010/09/25

    ISSN: 1342-5730

  43. パルス圧力付加オリフィス噴射法によるFe系金属ガラス単分散粒子の作製および冷却過程の検討

    福江正浩, 山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2010 235 2010/05/25

  44. 単粒子圧縮試験法によるFe系金属ガラスの粘性率測定およびその温度依存性

    山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2010 34 2010/05/25

  45. Fe系金属ガラスにおける粘性流動加工が結晶化に及ぼす影響

    米山太基, 寺島寛人, 山田類, 吉年規治, 川崎亮

    日本金属学会東北支部研究発表大会予稿集 9th 1 2010

  46. Fe系金属ガラス単分散粒子の作製と特性評価

    福江正浩, 山田類, 吉年規治, 川崎亮

    日本金属学会東北支部研究発表大会予稿集 9th 2 2010

  47. 単粒子圧縮試験法によるFe系金属ガラスの粘性率およびその温度依存性

    山田類, 吉年規治, 川崎亮

    粉体粉末冶金協会講演概要集 2009 207 2009/10/27

  48. マイクロホットプレス単粒子圧縮試験による金属ガラスの粘性率の推定

    山田類, 吉年規治, 川崎亮, 渡辺龍三

    粉体粉末冶金協会講演概要集 2009 103 2009/06/02

  49. 粘性流動プロセスを利用した金属ガラス粉末の緻密化挙動

    吉年規治, 山田類, 川崎亮, 渡辺龍三

    日本金属学会講演概要 144th 261 2009/03/28

    ISSN: 1342-5730

  50. 単粒子圧縮試験法によるFe系金属ガラスの粘性率およびその温度依存性

    山田類, 吉年規治, 川崎亮

    日本金属学会東北支部研究発表大会講演概要集 8th 2 2009

  51. 圧力付加液相焼結法によるFe系金属ガラス粉末の固化成形

    吉年規治, 山田類, 川崎亮

    粉体粉末冶金協会講演概要集 2008 199 2008/11/05

Show all ︎Show first 5

Books and Other Publications 1

  1. Handbook of Solid State Chemistry (Glass-Forming Ability, Recent Trends, and Synthesis Methods of Metallic Glasses)

    Hidemi Kato, Takeshi Wada, Rui Yamada, Junji Saida

    2017/08/09

Presentations 39

  1. Improvement of brittleness by tailoring a glassy state distribution in a monolithic metallic glass through thermal process Invited

    TMS2025 2025/03/26

  2. Al-Ge_2元共晶合金の液体急冷によるGeの液体からの非晶質化

    日本金属学会春季 2025/03/10

  3. Improvement of brittle properties of Zr-based metallic glass with creating glassy state gradient through a thermal process Invited

    ICEAN2024 2024/11/08

  4. Amorphization of Si-Ge by Non-Equilibrium Eutectic Reaction in a Liquid Quenched Al-Si-Ge Alloy

    NanoKorea2024 2024/07/04

  5. Al-Si-Ge合金の非平衡共晶反応を利用したSi-Ge相の非晶質化とその熱的特性評価

    粉体粉末冶金協会春季 2024/05/23

  6. Al-Si-Ge_3元系合金の液体急冷によるSi-Geの非晶質化とそのメカニズムの検討

    日本金属学会春期 2024/03/14

  7. Amorphization of Si in Al88Si12 eutectic alloy with liquid quenching

    2023/11/22

  8. 共晶合金を出発試料とした液体急冷によるSiの非晶質化

    日本材料学会 第9回材料WEEK 2023/10/10

  9. 液体急冷を通じたAl-Si 系共晶合金の非平衡凝固

    日本材料学会 第8回材料WEEK 2022/10/11

  10. Creation of Three-Dimensional Relaxation State Gradient in Zr50Cu40Al10 Metallic Glass Through a Thermal Process

    LAM18_2022 2022/09/05

  11. 熱的手法を通じたZr系金属ガラスの3次元緩和状態傾斜の形成

    日本金属学会春期 2022/03/17

  12. Amorphization of Si in Al-Cu-Si ternary alloy system with liquid quenching process

    2022/03/14

  13. 非対称なカップルドゾーンを有する共晶系合金の急冷凝固

    粉体粉末冶金協会2021年秋季講演大会 2021/11/09

  14. AlCuSi急冷凝固時の組織形成ならびに非晶質Si凍結メカニズムの検討

    日本材料学会 第7回材料WEEK 2021/10/13

  15. Fabrication of Fe-based metallic glassy microparts through unprecedented processes

    TMS 2021 150th Annual Meeting & Exhibition (Virtual) 2021/03/16

  16. 金属ガラスマイクロ部品創製プロセスの確立

    日本材料学会 第6回材料WEEK 2020/10/13

  17. 高圧熱処理が金属ガラスのガラス状態に及ぼす影響

    日本金属学会春期 2020/03/19

  18. 高圧熱処理Zr系金属ガラスのガラス状態解明

    日本材料学会 第5回材料WEEK 2019/10/16

  19. 高圧熱処理を施した金属ガラスの体積とエネルギーの相関

    日本金属学会2019年秋期 2019/09/12

  20. 高圧熱処理が導く特異なガラス状態の達成

    日本金属学会2019年春期 2019/03/21

  21. Super high dense Zr-based bulk metallic glass induced by high pressure treatment over Tg International-presentation Invited

    TMS 2019 148th Annual Meeting & Exhibition 2019/03/13

  22. 高圧合成を通じた高密度Zr系金属ガラスの新規創製

    日本金属学会2018年秋期 2018/09/20

  23. 回復熱処理を通じた金属ガラスの構造若返りと結晶化

    東京大学物性研究所短期研究会 ガラス転移と関連分野の最先端研究 2018/05/10

  24. Surface patterning of Zr-based metallic glass by laser irradiation International-presentation

    BIT's 4th Annual World Congress of Smart Materials-2018 2018/03/07

  25. Investigation of the rejuvenation behavior of Pd42.5Cu30Ni7.5P20 metallic glass International-presentation

    ISMANAM2017 2017/06/18

  26. 回復熱処理によるZr系およびPd系金属ガラスの構造若返り

    粉体粉末冶金協会2017年春期 2017/05/31

  27. 回復熱処理を利用した金属ガラスのガラス状態と結晶化との関係性の検討

    日本金属学会2017年春期 2017/03/15

  28. Rejuvenation mechanism and crystallization behavior of recovery annealed Zr-based metallic glass International-presentation

    MRS2016 Fall Meeting & Exhibit 2016/11/27

  29. 粘性流動を利用したFe系金属ガラスマイクロギアの創製プロセスの検討

    日本鉄鋼協会2016年秋期 2016/09/21

  30. Structural Rejuvenation of Recovery Annealed Zr- and Pd-Based Metallic Glasses International-presentation

    ISMANAM2016 2016/07/03

  31. Pd系金属ガラスの構造若返りと結晶化挙動の検討

    日本金属学会2016年春期 2016/03/23

  32. The Mechanism of Structural Rejuvenation in Recovery Annealed Metallic Glasses International-presentation Invited

    TMS2016 2016/02/14

  33. 粘弾性の観点から見たZr50Cu40Al10 金属ガラスの構造若返り

    日本材料学会2015年秋期 2015/10/13

  34. Verification of Structural Rejuvenation in Recovery Annealed Zr50Cu40Al10 Metallic Glass International-presentation

    EUROMAT2015 2015/09/20

  35. 金属ガラス表面へのレーザー照射による結晶相/酸化物相の選択的形成

    粉体粉末冶金協会2015年春期 2015/05/26

  36. Thermal History and Structural Rejuvenation in Recovery Annealed Zr-Based Metallic Glass International-presentation Invited

    BIT's 1st World Congress of Smart Materials 2015 2015/03/23

  37. バルク状試料を対象としたZr系金属ガラスの構造若返りの評価

    日本金属学会2015年春期 2015/03/18

  38. Zr系金属ガラスの熱履歴の検討及び熱的構造制御

    日本材料学会2014年秋季 2014/10

  39. Zr50Cu40Al10金属ガラスの熱的手法による構造若返りの検証

    日本金属学会2014年秋季 2014/09

Show all Show first 5

Research Projects 6

  1. -

    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

    2024/04 - 2027/03

  2. Advanced functionality of metallic glasses with inhomogeneous local structures by gradient and asymmetric multidimensional control of relaxation states

    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

    2023/04 - 2027/03

  3. Achievement of high toughened metallic glass with single amorphous phase through designing of anisotropy of random structure

    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

    2021/04 - 2024/03

  4. 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 - 2022/03

    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.

  5. Clarification of crystallization mechanisms through evaluating a residual amorphous state

    Yamada Rui, TANAKA Naoyuki, GUO Wei, SAIDA Junji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2016/04 - 2018/03

    More details Close

    Rapid cooling system for bulk meallic glassy samples was constructed and Zr,Pd based samples with various random structures were successfully prepared. TEM observations were conducted to observe the initial nucleation and crystal growth stages in metallic glasses and viscoelastic measurements were performed to evaluate the residual amorphous states. It was difficult to clarify which relaxation regions relates to each crystallization step, but we got another new findings cocerning the crystallization of metallic glasses. We revealed for the first time that the crystallization and rejuvenation area, which are apparently oposite energy state regions, can be coexisted in the glassy structure. Our findings will provide beneficial information for the crystallization studies of metallic glasses.

  6. マイクロホットプレスによるFe系微小金属ガラス粒子の粘性流動成形に関する研究

    山田 類

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2010 - 2012

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    Fe系金属ガラスは優れた機械的特性、磁気的特性を有する一方で、ガラス形成能や過冷却液体の熱的安1定性が低くバルク材の作製や粘性流動加工が困難であり、そのことが工業化への大きな妨げとなっていた。著者らは、サイズの制限を完全に克服した数百マイクロメートルサイズの微小球形金属ガラス原料粒子を作製し、その1つを高精度マイクロ金型に充填した後、単粒子圧縮による精密成形により、高機能Fe系金属ガラスマイクロ部品を作製することを最終目標としてこれまで研究を進めてきた。著者らの過去の研究において、パルス圧力付加オリフィス噴射法により均質かつほぼ同一の熱履歴を有するFe系金属ガラス単分散粒子の大量作製が可能となり、また潜伏時間内の短時間で圧縮試験が可能となるマイクロホットプレス装置を構築したことで、[(Fe_<0.5>Co_<0.5>)_<0.75>Si_<0.02>B_<0.5>]_<96>Nb_4金属ガラス過冷却液体の粘性率の温度依存性及び粘弾性挙動を明らかにすることに成功した。 本年度では、これらの基礎データを基にして、作製した粒径おおよそ500μmの金属ガラス粒子1つを、6枚歯及び9枚歯ギア形状を有する高精度マイクロ金型に充填し、マイクロ粘性流動加工を行った。その結果、 [(Fe_<0.5>Co_<0.5>)_<0.75>Si_<0.02>B_<0.5>]_<96>Nb_4金属ガラスマイクロギアの作製に世界で初めて成功した。さらに、作製した9枚歯を有するマイクロギアの中心に放電加工によりおおよそ200μm程度の穴をあけ、そこにシャフト軸を通した後、直線上のラックを用いることで動作確認を行い、作製したマイクロギアが正常に駆動することを確認した。 原料に微小球形金属ガラス粒子1つを用いるという新たな発想から得られた本結果は、先駆的かつ独創的であり、今後のFe系金属ガラスマイクロ部品の実用化を大いに期待させる成果である。

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