2023 Fiscal Year Final Research Report
Development of innovative high-strength bronze Nb3Sn superconducting wire for fusion utilizing external Sn diffusion
| Project/Area Number |
20H01889
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 14020:Nuclear fusion-related
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
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| 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)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| 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 |
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| 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.
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| Free Research Field |
核融合工学、超伝導材料工学、金属材料工学
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| 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。
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