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Three dimensional hydrogen mapping method using laser induced breakdown spectroscopy

Research Project

Project/Area Number 19K22038
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionTohoku University

Principal Investigator

IMASHUKU SUSUMU  東北大学, 金属材料研究所, 准教授 (40606620)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywordsレーザ誘起プラズマ分光法 / 水素 / 定量分析 / 分布測定 / レーザー誘起プラズマ分光法 / 水素濃度分布 / ニッケル水素電池 / 正極 / 水素吸蔵合金 / 3次元マッピング
Outline of Research at the Start

レーザ誘起プラズマ分光法(Laser Induced Breakdown Spectroscopy: LIBS)によって簡便かつ迅速に材料中の水素をマイクロメータスケールで3次元的に定量表示する手法を確立し、材料の性能向上につながる知見を得ることができる汎用的な水素分析法の実現を目指す。

Outline of Final Research Achievements

In the present study, we focused on laser induced breakdown spectroscopy (LIBS) as a method for rapidly determining hydrogen contents in materials, and have established a method to determine the hydrogen content and provide the hydrogen mapping. We can determine hydrogen contents in the range from 0.2 to 7.7 mass% for MgH2 by measuring the emission intensity at 656.28 nm from the sample in a helium atmosphere at 3000 pa and by reducing the water residues in both the sample and gas line of the LIBS system. We can also acquire a quantitative hydrogen mapping of a nickel-metal hydride battery cathode with inhomogeneous hydrogen distribution using a linear-transition automatic stage via LIBS.

Academic Significance and Societal Importance of the Research Achievements

本研究では、レーザー誘起プラズマ発光分光法を用いて、固体材料中の水素濃度分布を測定する方法を確立した。この手法は、従来の水素分布測定法と異なり、簡便かつ迅速に測定できるため、材料の性能向上につながる知見(例えば、水素吸蔵合金における水素侵入経路、燃料電池電極における反応機構および鉄鋼材料の水素脆化機構を解明するための情報)を得るための汎用的な水素分析法として普及する可能性がある。

Report

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

    (4 results)

All 2022 2021 2020

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

  • [Journal Article] Evaluating the Validity of a Hydrogen Mapping Method Based on Laser-induced Breakdown Spectroscopy2022

    • Author(s)
      Imashuku Susumu、Kamimura Takumi、Kawaguchi Tomoya、Ichitsubo Tetsu
    • Journal Title

      e-Journal of Surface Science and Nanotechnology

      Volume: 20 Issue: 1 Pages: 7-12

    • DOI

      10.1380/ejssnt.2022-007

    • NAID

      130008161061

    • ISSN
      1348-0391
    • Year and Date
      2022-02-17
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of MgO・Al2O3 Spinel on MgO Refractory for Aluminum Deoxidation Process of Stainless Steel Using Cathodoluminescence and X-ray Excited Optical Luminescence Imaging2021

    • Author(s)
      Imashuku Susumu
    • Journal Title

      Metallurgical and Materials Transactions B

      Volume: 53 Issue: 1 Pages: 190-197

    • DOI

      10.1007/s11663-021-02354-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantitative Analysis of Hydrogen in High-Hydrogen-Content Material of Magnesium Hydride via Laser-Induced Breakdown Spectroscopy2020

    • Author(s)
      Imashuku Susumu、Kamimura Takumi、Kashiwakura Shunsuke、Wagatsuma Kazuaki
    • Journal Title

      Analytical Chemistry

      Volume: 92 Issue: 16 Pages: 11171-11176

    • DOI

      10.1021/acs.analchem.0c01479

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Determination of hydrogen in a hydrogen-content material using laser-induced-breakdown spectroscopy2021

    • Author(s)
      Takumi Kamimura, Susumu Imashuku
    • Organizer
      13th International Symposium on Atomic Level Characterizations for New Materials and Devices '21 (ALC'21)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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Published: 2019-07-04   Modified: 2023-01-30  

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