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Mechanism and modeling of one-dimensional motion of interstitial clusters under ion irradiation

Research Project

Project/Area Number 17K07021
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear engineering
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Abe Yosuke  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 原子力基礎工学研究センター, 研究副主幹 (50400403)

Co-Investigator(Kenkyū-buntansha) 大久保 成彰  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 原子力基礎工学研究センター, 研究副主幹 (60391330)
佐藤 裕樹  広島工業大学, 工学部, 教授 (20211948)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords格子間原子集合体 / 一次元運動 / イオン照射 / カスケード損傷 / 電子顕微鏡その場観察 / 原子力材料 / 照射効果 / 純鉄
Outline of Final Research Achievements

One-dimensional (1D) fast migration of self-interstitial atom (SIA) clusters formed under neutron irradiation in fission reactors is known to affect the radiation-induced microstructural evolution in structural materials. In the present study, by in-situ observation using electron microscopy in self-ion irradiated alpha-iron and its alloys, we examined a role of 1D migration of SIA clusters under cascade damage condition. The results suggest that the candidate traps for one-dimensionally migrating SIA clusters are not only impurity/solute atoms, but also directly formed defect clusters by collision cascade under ion irradiation. Also, the displacement by high-energy irradiation provides a trigger for causing 1D migration by detrapping the stationary SIA clusters from the bounded traps, as demonstrated under electron irradiation.

Academic Significance and Societal Importance of the Research Achievements

実炉環境において、カスケード損傷の影響解明は原子力材料分野における衆目一致の重要課題であるものの、その素過程は十分に理解されていなかった。本研究課題では、イオン照射下その場観察実験を用いて、実炉環境下での照射損傷過程の基礎的理解の深化にとって重要である、カスケード損傷下での格子間原子集合体の1D運動の素過程を明らかにした。本実験手法が素過程の機構解明にとって有用であることを示したことは学術的意義がある。また、この成果は、ミクロ組織変化の予測モデルの高度化に繋がることが期待され、原子炉材料の長期健全性を担保する上で重要な社会的意義を有する。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Effect of one-dimensional migration of self-interstitial atom clusters on the decreasing behaviour of their number density in electron-irradiated alpha-iron2020

    • Author(s)
      Y. Abe and Y. Satoh, N. Hashimoto, S. Ohnuki
    • Journal Title

      Philosophical Magazine

      Volume: 100 Issue: 1 Pages: 110-125

    • DOI

      10.1080/14786435.2019.1673913

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 格子間原子集合体の一次元運動に対する照射場影響2020

    • Author(s)
      阿部、大久保、山下、佐藤
    • Organizer
      材料照射研究会「Irradiation 3.0 に向けて」
    • Related Report
      2019 Annual Research Report
  • [Presentation] イオン照射下での格子間原子集合体の一次元運動2020

    • Author(s)
      阿部、大久保、佐藤
    • Organizer
      金属学会春期講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effect of one-dimensional migration of self-interstitial atom clusters on their number density in alpha-iron under electron irradiation2019

    • Author(s)
      Y. Abe, Y. Satoh, N. Okubo, A. Konno
    • Organizer
      19th International Conference on Fusion Reactor Materials (ICFRM-19)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of one-dimensional migration of self-interstitial atom clusters on their nucleation and growth behaviour in alpha-iron under electron irradiation2018

    • Author(s)
      Y. Abe and Y. Satoh
    • Organizer
      5th Nuclear Materials Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 超高圧電子顕微鏡その場観察による格子間原子集合体の一次元運動機構と組織発達への影響の解明2018

    • Author(s)
      佐藤裕樹、阿部陽介
    • Organizer
      北海道大学大学院工学研究院第7回エネルギー・マテリアル融合領域シンポジウム「未来の社会を支えるエネルギーとマテリアル」
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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