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Direct observation of surface nanostructure created by swift heavy ions

Research Project

Project/Area Number 16K06963
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

Ishikawa Norito  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, 研究主幹 (90354828)

Co-Investigator(Kenkyū-buntansha) 田口 富嗣  国立研究開発法人量子科学技術研究開発機構, 高崎量子応用研究所 東海量子ビーム応用研究センター, 上席研究員(定常) (50354832)
篠嶋 妥  茨城大学, 理工学研究科(工学野), 教授 (80187137)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsナノ構造 / 照射損傷 / イオン照射 / セラミックス / ナノヒロック / 高速重イオン / 加速器 / 透過型電子顕微鏡 / 自己修復 / ナノ材料 / 粒子線
Outline of Final Research Achievements

Nanohillocks are formed at the surface of ceramics when irradiated with swift heavy ions with the energy above 100 MeV. To elucidate the mechanism of such surface nanostructures, transmission electron microscopy observation has been performed for various types of irradiated ceramics. We found that there are some materials where nanohillocks have crystalline feature, whereas most of the materials exhibit noncrystalline feature of the nanohillocks. Although crystal lattice structure is temporally lost near ion path for all the irradiated ceramics, crystal lattice structure is found to recover quickly only in the specific materials (e.g. CeO2, CaF2). Capability of restoring lattice structure is found in the materials where nanohillocks exhibit crystalline feature.

Academic Significance and Societal Importance of the Research Achievements

高速重イオン照射はセラミックス材料に対する破壊力が高く、照射によって結晶構造が崩れていくことは不可避だと考えられてきた。しかし、本研究により、一部のセラミックスにおいては、結晶構造が崩れた後でも急速に結晶構造を修復させる能力を有していることが分かった。耐照射性の高いセラミックス材料を開発する上で、一部のセラミックスのもつこの損傷修復能力の発見は非常に重要である。この損傷修復能力を最大化する方向に研究開発が進めば、今後新しい耐照射性材料を開発する道が開けると期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Journal Article] Structure analysis of the defects generated by a thermal spike in single crystal CeO2: A molecular dynamics study2019

    • Author(s)
      Y. Sasajima et al.
    • Journal Title

      Nuclear Inst. and Methods in Physics Research B

      Volume: 440 Pages: 118-125

    • DOI

      10.1016/j.nimb.2018.12.013

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hillocks created for amorphizable and non-amorphizable ceramics irradiated with swift heavy ions: TEM study2017

    • Author(s)
      Ishikawa N、Taguchi T、Okubo N
    • Journal Title

      Nanotechnology

      Volume: 28 Issue: 44 Pages: 445708-445708

    • DOI

      10.1088/1361-6528/aa8778

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] セラミックスへの高速重イオン照射による表面ナノ構造の形成過程2019

    • Author(s)
      石川法人
    • Organizer
      日本金属学会2019 年春期(第164 回) 講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Is a hillock just a protrude part of an ion track?2018

    • Author(s)
      石川法人
    • Organizer
      SHIM-ICACS2018 (10th International Symposium on Swift Heavy Ions in Matter & 28th International Conference on Atomic Collisions in Solids)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] TEM Study of Surface Nanostructure of Ceramics Irradiated with Swift Heavy Ions2018

    • Author(s)
      石川法人
    • Organizer
      第28 回日本MRS 年次大会
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] STRUCTURE OF HILLOCKS AT SURFACE OF CERAMICS IRRADIATED WITH SWIFT HEAVY IONS2017

    • Author(s)
      石川法人, 田口富嗣, 大久保成彰
    • Organizer
      ISI-2017(イオン-表面相互作用国際会議)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Hillock formation at the surface of ceramics irradiated with swift heavy ions2016

    • Author(s)
      石川法人
    • Organizer
      欧州材料学会E-MRS(European Materials Research Society) Fall meeting 2016
    • Place of Presentation
      ワルシャワ工科大学(ポーランド)
    • Year and Date
      2016-09-20
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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