2023 Fiscal Year Final Research Report
Strengthening mechanism in transition-metal silicide-based eutectic composites
| Project/Area Number |
21H01651
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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 26040:Structural materials and functional materials-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 共晶複相材料 / 異常強化現象 / 力学特性 / 構造・機能材料 / 強化機構 |
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| Outline of Final Research Achievements |
Recently, we have found that the high temperature strength of transition-metal silicide-based directionally solidified (DS) eutectic composites can be improved drastically when the transition-metal element in the composites is substituted by large amounts of two or three different transition-metal elements simultaneously. In this study, deformation mechanisms of various component transition-metal silicide phases in the eutectic composites as well as the proper growth conditions for obtaining DS eutectic composites with homogeneous and fine lamellar microstructure were investigated in order to elucidate the strengthening mechanisms of the DS eutectic composites.
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| Free Research Field |
結晶物性
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は次世代の超耐熱構造材料の候補である共晶一方向凝固材料の優れた力学特性の起源を明らかにすることを目的としたもので，新規な解析手法を駆使することにより各種遷移金属シリサイド相の塑性変形機構と力学特性を解明するとともに，優れた力学特性発現に不可欠な合金設計ならびに組織制御に関する基礎的知見を得たことが学術的意義が髙い．また得られた成果をもとに新規超耐熱材料が開発につながれば，様々な熱機関の熱効率の向上と，その結果としての温室効果ガスの排出削減に寄与することが期待されるため社会的意義も高い．
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