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Development of innovative high-strength bronze Nb3Sn superconducting wire for fusion utilizing external Sn diffusion

Research Project

Project/Area Number 20H01889
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institute for Fusion Science

Principal Investigator

HISHINUMA Yoshimitsu  核融合科学研究所, 研究部, 准教授 (00322529)

Co-Investigator(Kenkyū-buntansha) 嶋田 雄介  九州大学, 総合理工学研究院, 准教授 (20756572)
菊池 章弘  国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, グループリーダー (50343877)
小黒 英俊  東海大学, 工学部, 講師 (90567471)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywords核融合 / Nb3Sn線材 / 高強度化 / 固溶強化 / 臨界電流特性 / 応力・ひずみ効果 / Nb3Sn / 内部強化 / 高Jc化 / HIP処理 / 核融合炉 / 内部補強 / 固溶強化機構 / HIP
Outline of Research at the Start

ITER以降の原型炉における超伝導マグネットに対して実用性及び生産性に優位なブロンズ法Nb3Sn極細多芯線の高強度化が切望されている。
これまでに、従来の外部補強による高強度化ではなく、金属学的相変態論に基づく固溶強化機構を利用した三元系ブロンズ(Cu-Sn-In)による新しく簡素な高強度化に成功し、最高の機械強度を示した。しかし、超伝導特性に大きく影響するブロンズ母材中の初期Sn量の低下が明らかになった。
当該研究では、これまでに得られた成果を更に高度化する目的で、高Sn濃度合金等を配置した外部Sn拡散等を駆使することで高超伝導特性と高強度を両立した革新的ブロンズ法の実現を目指す。

Outline of Final Research Achievements

In the CIC conductor system, which is applied to large conductors for nuclear fusion, deterioration of conductor performance due to transverse compressive loading has been a serious problem, we found that the performance degradation due to transverse compressive loading can be suppressed by reinforcing the internal matrix with a ternary bronze alloy.
As part of the optimization of ternary bronze alloys, a “hybrid matrix” was developed by combining Cu-In/Cu-Sn-In, and it was found that the formation of Nb3Sn phase and high In concentration in (Cu,In) solid solution were possible.

Academic Significance and Societal Importance of the Research Achievements

三元系ブロンズ合金を適用することで、線材母材を簡易的な固溶強化機構で高強度化が可能となり、これまで懸念されていた横圧縮荷重印加による性能劣化を抑制する新しい方法を見出したことは学術的に意義深いと考えている。
本研究成果は、核融合だけでなく先進加速器や重粒子線医療分野にも波及する成果である。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (18 results)

All 2023 2022 2021 2020

All Journal Article (9 results) (of which Peer Reviewed: 9 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results)

  • [Journal Article] Improvement of Mechanical Properties by Internal Matrix Reinforcement in Bronze Processed Nb<sub>3</sub>Sn wire2023

    • Author(s)
      HISHINUMA Yoshimitsu、KIKUCHI Akihiro、TANIGUCHI Hiroyasu、OGURO Hidetoshi、AWAJI Satoshi、MUROGA Takeo
    • Journal Title

      TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)

      Volume: 58 Issue: 3 Pages: 108-115

    • DOI

      10.2221/jcsj.58.108

    • ISSN
      0389-2441, 1880-0408
    • Year and Date
      2023-05-20
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Present status of the high mechanical strengthened Nb3Sn superconducting wires for fusion applications2022

    • Author(s)
      Hishinuma Yoshimitsu、Kikuchi Akihiro、Oguro Hidetoshi、Taniguchi Hiroyasu、Awaji Satoshi、Muroga Takeo
    • Journal Title

      Journal of Nuclear Materials

      Volume: 567 Pages: 153808-153808

    • DOI

      10.1016/j.jnucmat.2022.153808

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Study of RHQT-processed Nb3Al multifilamentary rectangular tape strand to be applied to a fusion magnet2022

    • Author(s)
      Hishinuma Yoshimitsu、Kikuchi Akihiro、Iijima Yasuo、Tsuchiya Kiyosumi、Wang Xudong、Takahata Kazuya、Mito Toshiyuki
    • Journal Title

      Fusion Engineering and Design

      Volume: 180 Pages: 113169-113169

    • DOI

      10.1016/j.fusengdes.2022.113169

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Jc Performance Under Transverse Compressive Stress of Internal Matrix Reinforced Nb<sub>3</sub>Sn Multifilamentary Wires Using Various Ternary Bronze Alloys2022

    • Author(s)
      Hishinuma Yoshimitsu、Oguro Hidetoshi、Taniguchi Hiroyasu、Awaji Satoshi、Kikuchi Akihiro
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 32 Issue: 6 Pages: 6000404-6000404

    • DOI

      10.1109/tasc.2022.3154681

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of in Addition and Heat Treatment Temperature on Nb₃Sn Superconducting Wire Prepared Using Cu–Based Ternary Alloy2022

    • Author(s)
      李 昇原、池野 進、松田 健二、三井 嘉人、菱沼 良光、土屋 大樹、西村 克彦、会田 哲夫、菊池 章弘、Sarka Mikmekova、谷口 博康
    • Journal Title

      Journal of Japan Institute of Copper

      Volume: 61 Issue: 1 Pages: 23-27

    • DOI

      10.34562/jic.61.1_23

    • ISSN
      1347-7234, 2435-872X
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Superconducting Properties and Microstructure of In-situ Cu Addition Low Activation MgB<sub>2</sub> Multifilamentary Wires Using Different Boron-11 Isotope Powders2022

    • Author(s)
      Yoshimitsu HISHINUMA、Yusuke SHIMADA、Satoshi HATA、Teruya TANAKA、Akihiro KIKUCHI
    • Journal Title

      TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)

      Volume: 57 Issue: 1 Pages: 31-38

    • DOI

      10.2221/jcsj.57.31

    • NAID

      130008143153

    • ISSN
      0389-2441, 1880-0408
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of the Cu based binary alloys and the internal matrix reinforcement bronze processed Nb3Sn wires2021

    • Author(s)
      Y. Hishinuma, H. Taniguchi, T. Mizuta, Y. Mizuta and A. Kikuchi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1857 Issue: 1 Pages: 012019-012019

    • DOI

      10.1088/1742-6596/1857/1/012019

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Suppression of the critical current degradation under the compressive stress on the internal reinforcement bronze processed Nb3Sn wire using Cu-Sn-In ternary bronze alloy matrix2021

    • Author(s)
      Y. Hishinuma, H. Oguro, H. Taniguchi, S. Awaji and A. Kikuchi
    • Journal Title

      Fusion Engineering and Design

      Volume: 168 Pages: 112365-112365

    • DOI

      10.1016/j.fusengdes.2021.112365

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mechanical Strength Evaluation of the Internal Matrix Reinforced Nb3Sn Multifilamentary Wires Using Cu?Sn?In Ternary Alloy Matrix2020

    • Author(s)
      Y. Hishinuma, H. Oguro, H. Taniguchi, S. Awaji and A. Kikuchi
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 30 Issue: 4 Pages: 1-4

    • DOI

      10.1109/tasc.2020.2981305

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] HIP effect on mechanical strength of the internal matrix reinforced Nb3Sn multifilamentary wires using various ternary bronze alloy matrices2023

    • Author(s)
      Yoshimitsu Hishinuma, Hiroyuki Noto, Hidetoshi Oguro, Hiroyasu Taniguchi, Satoshi Awaji and Akihiro Kikuchi
    • Organizer
      28th International Conference on Magnet Technology (MT-28)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 内部マトリックス補強によるNb3Sn線材の機械強度特性の向上2022

    • Author(s)
      菱沼 良光、小黒 英俊、谷口 博康、淡路 智、菊池 章弘
    • Organizer
      プラズマ・核融合学会第39回年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Critical current distribution of Nb3Al strand in a test conductor assembled with RHQT-Nb3Al rectangular tape-shaped strand oriented for indirect cooling2022

    • Author(s)
      Y. Hishinuma, A. Kikuchi, Y. Iijima, K. Tsuchiya and K. Takahata
    • Organizer
      Applied Superconductivity Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 内部マトリックス補強高強度Nb3Sn線材の開発2022

    • Author(s)
      菱沼 良光 , 小黒 英俊 , 谷口 博康 , 淡路 智 , 菊池 章弘
    • Organizer
      第14回核融合エネルギ-連合講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Present status of the high mechanical strengthened Nb3Sn superconducting wires for fusion applications2021

    • Author(s)
      Y. Hishinuma, A. kikuchi, H. Oguro, H. Taniguchi, S. Awaji and T. Muroga
    • Organizer
      20th International Conference on Fusion Reactor materials (ICFRM-20)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Jc performance under the transverse compressive stress in the internal matrix reinforced Nb3Sn multifilamentary wires using various ternary bronze alloy matrices2021

    • Author(s)
      Y. Hishinuma, H. Oguro, H. Taniguchi, S. Awaji and A. Kikuchi
    • Organizer
      27th International Conference on Magnet Technology (MT-27)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 三元系ブロンズ合金を用いた内部補強Nb3Sn線材の臨界電流特性における圧縮応力依存性2020

    • Author(s)
      菱沼 良光、小黒 英俊、谷口 博康、淡路 智、 菊池 章弘
    • Organizer
      第99回春季低温工学・超電導学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Critical current degradation improvement under the compressive stress on the internal reinforcement bronze processed Nb3Sn wire using Cu-Sn-In ternary alloy matrix2020

    • Author(s)
      Y. Hishinuma, H. Oguro, H. Taniguchi, S. Awaji and A. Kikuchi
    • Organizer
      31st Symposium on Fusion Technology (SOFT'2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Jc degradation behavior due to the transverse compressive stress on the bronze processed Nb3Sn multifilamentary wires using various ternary bronze alloy matrices2020

    • Author(s)
      Y. Hishinuma, H. Oguro, H. Taniguchi, S. Awaji and A. Kikuchi
    • Organizer
      Applied Superconductivity Conference (ASC'2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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