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Development of high-performance magnetostrictive alloys by gallium diffusion into grain-oriented electrical steel sheets.

Research Project

Project/Area Number 21K04707
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26050:Material processing and microstructure control-related
Research InstitutionTohoku University

Principal Investigator

Kawamata Toru  東北大学, 金属材料研究所, 助教 (90638355)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords磁歪材料 / 電磁鋼板 / 電析めっき / 環境発電 / 方向性電磁鋼板 / 振動発電 / FeGa合金 / 逆磁歪 / 磁歪 / エネルギーハーベスティング
Outline of Research at the Start

身の回りに発生する機械的振動エネルギーを有用な電気エネルギーに変換する環境発電技術として, FeGa単結晶合金を用いた逆磁歪式振動発電デバイスが期待されている. 安価に供給されているFeSi方向性電磁鋼板をテンプレート材料として, これにガリウム元素を浸透させることにより, 結晶方位の集積した ”方向性FeGa合金” を得るための新規合成手法を確立する。また磁区構造のin-situ観察を通してバイアス磁場の最適化と発電量の向上を目指す. 近年のIoTデバイスの爆発的な普及を背景として, 本研究の遂行により経済的な波及的効果が極めて高い成果が得られると考えている.

Outline of Final Research Achievements

In this study, Fe-Si-Ga alloys with gallium diffused into commercially available high grade grain-oriented (GO) electrical steel sheets were prepared with the aim of developing inexpensive and high-performance magnetostrictive materials as an alternative to FeGa single-crystal alloys. Gallium was uniformly diffused into the GO electrical steel sheets by electrodeposition plating and annealing. It was found that the addition of Ga to the directional electromagnetic steel sheet causes a decrease in Young's modulus and an increase in magnetostriction with respect to the <100> orientation, which are characteristic of FeGa single-crystal alloys. It is also revealed that the magnetostriction and reverse magnetostriction capability are improved by adding small amounts of additional elements. These results suggest that the Fe-Si-Ga alloy with gallium diffused into the GO electrical steel sheets is a promising low-cost alternative to Fe-Ga single-crystal alloys.

Academic Significance and Societal Importance of the Research Achievements

の回りに発生する機械的振動エネルギーを有用な電気エネルギーに変換する環境発電 (エネルギーハーベスティング)技術として, FeGa単結晶合金を用いた逆磁歪式振動発電デバイスが期待されているが, 実用化・普及に際してFeGa単結晶合金の低コスト化が大きな課題となっている. 本研究では, 長年に渡る研究開発により既に低コスト化・量産化の技術が確立されているFeSi方向性電磁鋼板をテンプレート材料として, これにガリウム元素を浸透させることにより, 結晶方位の集積した安価な ”方向性FeGa合金” を得るための新規合成手法を確立し、その特性を明らかにした。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (6 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] Strain and Magnetic Field Changes in Vibration of Devices Attached Iron Alloys with Large Magnetostriction2024

    • Author(s)
      Chiba Masaki、Misawa Kensuke、Tanimoto Hisanori、Kumagai Masayoshi、Sato Shigeo、Kawamata Toru、Suzuki Shigeru
    • Journal Title

      Tetsu-to-Hagane

      Volume: 110 Issue: 5 Pages: 404-413

    • DOI

      10.2355/tetsutohagane.TETSU-2023-112

    • ISSN
      0021-1575, 1883-2954
    • Year and Date
      2024-04-01
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 外的振動に対する軟磁性材料の応答性2023

    • Author(s)
      鈴木 茂, 千葉 雅樹, 川又 透, 梅津 理恵
    • Journal Title

      金属

      Volume: 93 Pages: 14-21

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characteristic Twin Formation in Body-centered Cubic Fe–Ga Alloy Single Crystals with Different Orientations2022

    • Author(s)
      Shigeru SUZUKI, Kazuhiro MIZUSAWA, Toru KAWAMATA, Rie Yamauchi, UMETSU, Tsuyoshi KUMAGAI, Tsuguo FUKUDA, Shigeo SATO
    • Journal Title

      ISIJ International

      Volume: 62 Issue: 5 Pages: 957-962

    • DOI

      10.2355/isijinternational.ISIJINT-2021-345

    • ISSN
      0915-1559, 1347-5460
    • Year and Date
      2022-05-15
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetic Properties and Substructure of Iron–Gallium Alloy Single Crystals Processed from Ingot to Wafers2022

    • Author(s)
      Chiba Masaki、Tanno Takenori、Abe Maho、Hashi Shuichiro、Ishiyama Kazushi、Kawamata Toru、Umestu Rie Y.、Sugiyama Kazumasa、Sato Shigeo、Mochizuki Yosuke、Yatsushiro Koji、Kumagai Tsuyoshi、Fukuda Tsuguo、Tanaka Shun-Ichiro、Suzuki Shigeru
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 63 Issue: 4 Pages: 502-507

    • DOI

      10.2320/matertrans.MT-M2021217

    • NAID

      130008159024

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2022-04-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Ga浸透電磁鋼板の磁気特性と結晶構造評価2022

    • Author(s)
      横田尚也, 川又透, 杉山和正, 鈴木茂
    • Organizer
      日本金属学会 2022秋期第171回講演大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Gaを添加した方向性電磁鋼板の磁気特性評価2021

    • Author(s)
      横田尚也, 川又透, 杉山和正, 鈴木茂
    • Organizer
      第20回日本金属学会東北支部研究発表大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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