2023 Fiscal Year Final Research Report
Challenge to strengthen ceramics beyond theoretical strength by introducing lattice defects
| Project/Area Number |
21K04937
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 31010:Nuclear engineering-related
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| Research Institution | Tohoku University |
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Principal Investigator |
Kondo Sosuke 東北大学, 金属材料研究所, 准教授 (10563984)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 照射損傷 |
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| Outline of Final Research Achievements |
Silicon carbide (SiC) fiber-reinforced SiC matrix composites (SiCf/SiC) are expected to be used as blanket materials in nuclear fusion reactors, but irradiation-induced shrinkage is a significant issue. This study aimed to investigate the effects of irradiation on SiC fibers and elucidate the mechanisms of shrinkage and expansion. Through SEM and STEM observations, complete amorphization of HNLS fibers and partial amorphization of TSA3 fibers were confirmed, and the degradation of mechanical properties was evaluated. Furthermore, the study clarified the impact of the degree of amorphization on mechanical properties and proposed optimal usage conditions, providing insights that contribute to the performance improvement of SiCf/SiC.
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| Free Research Field |
原子力材料、核融合材料、照射損傷、セラミックス
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| Academic Significance and Societal Importance of the Research Achievements |
この研究は、核融合炉の安全性と効率性を向上させるために重要である。SiC繊維強化SiCマトリックス複合材料（SiCf/SiC）は、高温や放射線に耐えうる材料として核融合炉のブランケット材料に適しているが、放射線照射による収縮と機械的特性の劣化が課題であった。本研究はそのメカニズムを解明し、最適な使用条件を提案することで、核融合炉の実用化に向けた材料設計の基盤を提供する。これにより、持続可能なエネルギー源としての核融合技術の発展に寄与する。
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