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Development of portable positron annihilation lifetime spectrometer and its in situ applications

Research Project

Project/Area Number 19H02742
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionChiba University

Principal Investigator

Fujinami Masanori  千葉大学, 大学院工学研究院, 教授 (50311436)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2019: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywords陽電子消滅 / 水素脆化 / 鉄 / ニッケル / 水素 / その場計測 / その場分析 / 格子欠陥 / 可搬型
Outline of Research at the Start

普及型陽電子消滅装置を開発し,かつフィールドでのその場構造体余寿命評価法への展開を目的とする。ここでは,試料以外に入射した陽電子からの信号を除去する方法が問題となるが,陽電子入射によって発光するシンチレータを試料以外の空間に配置し,発光信号との反同時計数法を用いた解決策を利用する。さらに,物質科学のブレイクスルーに資する応用例として,長年の未解明問題である水素脆化支配欠陥決定に取組み,水素環境下延伸状態でのその場分析を実現し,原子空孔が力学特性劣化に果たす役割を解明する。

Outline of Final Research Achievements

In the development of an in situ positron annihilation lifetime spectroscopy (PALS), I have proved that hydrogen-induced defects in pure iron are vacancy-hydrogen complexes by developing a PALS apparatus that enables measurement while hydrogen is charged, and suggested that hydrogen embrittlement is crucial because of their local densification. By utilizing a PALS apparatus capable of measuring on the order of minutes, it was also clarified that in pure Ni, unlike Fe, vacancies are formed only by hydrogen addition, and the relationship between the formation of vacancy clusters and the aging process of hydrogen desorption. Furthermore, it is suggested that the formation of vacancy-hydrogen complexes is also involved in the hydrogen embrittlement of Ni.

Academic Significance and Societal Importance of the Research Achievements

本研究では,水素添加しながら,あるいは延伸しながらその状態で陽電子消滅消滅が可能となり,材料の格子欠陥を調べることが可能となった。従来はそれらが空孔クラスターに成長した状態でしか観察できなかったが,これにより,不安定であった水素誘起欠陥を検出することに成功した。また,分オーダーでの陽電子消滅測定により,分オーダーで変化する空孔成長過程を直接観察することができた。これらは,従来知見を根底から覆すものであり,画期的である。今後,不安定な欠陥計測に開発装置は大きく寄与していくことが期待される。

Report

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

    (23 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (10 results) (of which Int'l Joint Research: 2 results) Book (2 results) Remarks (1 results)

  • [Int'l Joint Research] Helmholtz-Zentrum Dresden-Rossendorf(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Helmholtz-Zentrum Dresden-Rossendorf(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Recent studies of hydrogen-related defects in iron-based materials2022

    • Author(s)
      L. Chiari, M. Fujinami
    • Journal Title

      ISIJ International

      Volume: 62

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of the Chemical State in Y-zeolite Pores by Positron Annihilation Lifetime Spectroscopy2021

    • Author(s)
      Chiari Luca, Ohnuki Chihiro, Fujinami Masanori
    • Journal Title

      Analytical Sciences

      Volume: 37 Issue: 8 Pages: 1117-1122

    • DOI

      10.2116/analsci.20P416

    • NAID

      130008072598

    • ISSN
      0910-6340, 1348-2246
    • Year and Date
      2021-08-10
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Defects Responsible for Hydrogen Embrittlement in Austenitic Stainless Steel 304 by Positron Annihilation Lifetime Spectroscopy2021

    • Author(s)
      L. Chiari, A. Komatsu, M. Fujinami
    • Journal Title

      ISIJ International

      Volume: 61 Issue: 6 Pages: 1927-1934

    • DOI

      10.2355/isijinternational.ISIJINT-2020-670

    • NAID

      130008053347

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2021-06-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Formation and time dynamics of hydrogen-induced vacancies in nickel2021

    • Author(s)
      L. Chiari, K. Kojima, Y. Endo, H. Teshigahara, M Butterling, M.O. Liedke, E. Hirschmann, A.G. Attallah, A. Wagner, M. Fujinami
    • Journal Title

      Acta Mater.

      Volume: 219 Pages: 117264-117264

    • DOI

      10.1016/j.actamat.2021.117264

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Strain-rate dependence of hydrogen-induced defects in pure α-iron by positron annihilation lifetime spectroscopy2021

    • Author(s)
      Chiari Luca, Nozaki Ayaka, Koizumi Kazuki, Fujinami Masanori
    • Journal Title

      Materials Science and Engineering: A

      Volume: 800 Pages: 140281-140281

    • DOI

      10.1016/j.msea.2020.140281

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Straining-temperature dependence of vacancy behavior in hydrogen-charged austenitic stainless steel 316L2021

    • Author(s)
      Komatsu Akari, Fujinami Masanori, Hatano Masaharu, Matsumoto Kazuhisa, Sugeoi Mitsuki, Chiari Luca
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 46 Issue: 9 Pages: 6960-6969

    • DOI

      10.1016/j.ijhydene.2020.11.148

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A positronium-based systematic study of the physico-chemical properties of zeolite pores2021

    • Author(s)
      Chiari Luca, Ohnuki Chihiro, Fujinami Masanori
    • Journal Title

      Radiation Physics and Chemistry

      Volume: 184 Pages: 109441-109441

    • DOI

      10.1016/j.radphyschem.2021.109441

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gettering of Cu in self-ion irradiated silicon studied by positron annihilation spectroscopy2019

    • Author(s)
      Kazuhito Matsukawa, Masanori Fujinami, Koun Shirai, Koichi Oguma, Takashi Akahane, Ryoichi Suzuki, Toshiyuki Ohdaira
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: 9 Pages: 096501-096501

    • DOI

      10.7567/1347-4065/ab352c

    • NAID

      210000156804

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] α鉄の水素脆化支配欠陥決定のための水素添加 in situ 陽電子消滅測定法2022

    • Author(s)
      藤浪眞紀,松野明未,山脇正人,大島永康,佐藤礼,高井健一
    • Organizer
      日本鉄鋼協会第183回春季講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 陽電子からみた純鉄およびステンレス鋼の水素脆化2021

    • Author(s)
      藤浪眞紀,Chiari Luca
    • Organizer
      日本鉄鋼協会第182回秋季講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 純鉄中の水素関与欠陥検出のためのin situ 陽電子消滅測定2021

    • Author(s)
      藤浪眞紀,遠藤悠祐,Chiari Luca
    • Organizer
      日本分析化学会第81回分析化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超伝導加速器ベースの陽電子消滅法による純Ni中の水素誘起欠陥の経時変化2021

    • Author(s)
      藤浪眞紀,Chiari Luca,Maik Buttering,Andreas Wagner
    • Organizer
      日本鉄鋼協会第181春季講演大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 水素添加した Ni の空孔挙動の経時変化測定2020

    • Author(s)
      遠藤悠祐,小島健司,勅使河原広貴,Chiari Luca,Maik Buttering,Andreas Wagner,藤浪眞紀
    • Organizer
      2020年度京都大学複合原子力科学研究所専門研究会「陽電子科学とその理工学への応用」
    • Related Report
      2020 Annual Research Report
  • [Presentation] 陽電子消滅法による純ニッケルの水素脆化支配欠陥2019

    • Author(s)
      小島健司, Luca Chiari, 藤浪眞紀
    • Organizer
      日本分析化学会 第68年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 陽電子消滅法による純Ni中の水素誘起欠陥2019

    • Author(s)
      藤浪眞紀,小島健司,Luca Chiari
    • Organizer
      日本分析化学会 第79回分析化学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 陽電子消滅法による純Ni中の水素誘起欠陥と水素脆化2019

    • Author(s)
      藤浪眞紀,小島健司,Chiari Luca
    • Organizer
      日本鉄鋼協会 第179回春季講演大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Positron annihilation spectroscopy of the crucial defects induced in austenitic stainless steel upon hydrogen embrittlement2019

    • Author(s)
      M. Fujinami, A. Komatsu, L. Chiari
    • Organizer
      GRC Hydrogen-Metal Systems
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The crucial defects induced in iron and stainless steel upon hydrogen embrittlement by positron annihilation spectroscopy2019

    • Author(s)
      M. Fujinami, A. Komatsu, L. Chiari
    • Organizer
      15th International Workshop on Slow Positron Beam Techniques & Applications
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Book] 放射線取扱の基礎9版2021

    • Author(s)
      伊藤守弘,上蓑義朋,杉山和幸,中村美和,桧垣正吾,藤浪眞紀,渡部浩司
    • Total Pages
      512
    • Publisher
      丸善出版
    • ISBN
      9784890732838
    • Related Report
      2020 Annual Research Report
  • [Book] 放射線安全管理の実際2020

    • Author(s)
      藤浪眞紀,上蓑義朋,木内伸幸,桧垣正吾,二ツ川章二,八木洋
    • Total Pages
      238
    • Publisher
      丸善出版
    • ISBN
      9784890732760
    • Related Report
      2019 Annual Research Report
  • [Remarks] 千葉大学工学部共生応用化学コース計測化学研究室

    • URL

      http://chem.tf.chiba-u.jp/gacb11/index.html

    • Related Report
      2020 Annual Research Report

URL: 

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

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