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Synthesis of super-dense bulk metallic glasses under high-pressure and high-temperature conditions

Research Project

Project/Area Number 19K04992
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26010:Metallic material properties-related
Research InstitutionHigh Energy Accelerator Research Organization (2020-2021)
National Institute for Materials Science (2019)

Principal Investigator

Shibazaki Yuki  大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 特別助教 (10730830)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords金属ガラス / 高温高圧 / 局所構造
Outline of Research at the Start

金属ガラスとは、文字通り、ランダム原子配列構造を有する非晶質金属のことである。その特異な非晶質構造なため、通常の結晶金属と比べ、高強度、軟磁性、高耐食性など優れた機械的・磁気的特性を持つ。最近、申請者らの研究によって、高圧下で熱処理を行うことで特異な構造変化が起こり、さらに超高密度化も起こることが見いだされた。
本研究では、高圧熱処理によって合成された高密度金属ガラスの機械的特性を評価し、さらに、放射光X線と中性子線、数値モデリングを組み合わせた局所構造測定によって高密度化の原子レベルでの可視化を行う。これによって高圧熱処理の有効性の評価とメカニズムの解明を行う。

Outline of Final Research Achievements

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. 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.

Academic Significance and Societal Importance of the Research Achievements

金属ガラスは、結晶金属にはない優れた機械的・磁気的特性を有する実用金属材料である。この金属ガラスを高圧熱処理することで、機械的性能が向上することが今回明らかになった。希少金属を添加することで部分ナノ結晶化を誘発し、機械的性能が向上することは、これまでにも分かっていたが、高圧熱処理が同様の効果をもたらし、より効果的に性能を向上させることが本研究によって明らかになった。これにより、希少金属に頼らない、新たな性能向上のプロセス確立が期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2021 2020 2019

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] Continuous measurement of ultrasonic elastic wave velocities, X-ray radiography and X-ray diffraction of Zr50Cu40Al10 metallic glass at high pressure and high temperature conditions2021

    • Author(s)
      Kono Yoshio、Higo Yuji、Greaux Steeve、Shibazaki Yuki、Yamada Rui、Kuwahara Hideharu、Kondo Nozomi
    • Journal Title

      High Pressure Research

      Volume: 41 Issue: 3 Pages: 219-232

    • DOI

      10.1080/08957959.2021.1941000

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High-pressure annealing driven nanocrystal formation in Zr50Cu40Al10 metallic glass and strength increase2020

    • Author(s)
      Shibazaki Yuki、Yamada Rui、Saida Junji、Kono Yoshio、Wakeda Masato、Itoh Keiji、Nishijima Masahiko、Kimoto Koji
    • Journal Title

      Communications Materials

      Volume: 1 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s43246-020-00057-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Breakdown of One-to-One Correspondence in Energy and Volume in a High-Pressure Heat-Treated Zr-Based Metallic Glass During Annealing2020

    • Author(s)
      Yamada Rui、Shibazaki Yuki、Abe Yasuto、Ryu Wookha、Saida Junji
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41598-020-64442-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Unveiling a new type of ultradense anomalous metallic glass with improved strength and ductility through a high-pressure heat treatment2019

    • Author(s)
      Yamada Rui、Shibazaki Yuki、Abe Yasuto、Ryu Wookha、Saida Junji
    • Journal Title

      NPG Asia Materials

      Volume: 11 Issue: 1 Pages: 1-9

    • DOI

      10.1038/s41427-019-0175-1

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 高空間分解能イメージングシステムの導入とPF AR-NE1Aの将来運用2021

    • Author(s)
      柴崎裕樹、船守展正
    • Organizer
      第62回高圧討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高圧熱処理によるZr50Cu40Al10金属ガラスの組織変化2019

    • Author(s)
      柴崎裕樹、山田類、才田淳治、河野義生、譯田真人、伊藤恵司
    • Organizer
      日本金属学会2019年秋期講演大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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