Irradiation effects of carbon fibers in C/SiC composites

Understanding the radiation-induced microstructure evolution of carbon fibers is crucial for C/SiC composites as they are considered promising structural materials for high-temperature gas-cooled nuclear reactors. In this study, M55J C/SiC and T300 C/SiC composites were irradiated up to 9.8 dpa at 3...

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Bibliographic Details
Published inMaterials characterization Vol. 196; p. 112638
Main Authors Yang, Jing, Zheng, Ce, Xu, Shanshan, Wei, Chong, Zhang, Cheng, Bi, Yichun, Li, Xiaoqiang
Format Journal Article
LanguageEnglish
Published Elsevier Inc 01.02.2023
Subjects
C/SiC composites
Carbon fibers
Ion irradiation
Microstructure
Carbon fibers
Ion irradiation
Microstructure
C/SiC composites
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Summary:Understanding the radiation-induced microstructure evolution of carbon fibers is crucial for C/SiC composites as they are considered promising structural materials for high-temperature gas-cooled nuclear reactors. In this study, M55J C/SiC and T300 C/SiC composites were irradiated up to 9.8 dpa at 350 °C. AFM results suggested that both two carbon fibers shrank axially after irradiation. At a given irradiation dose, the shrinkage of M55J fibers was slightly lower than that of T300 fibers. Detailed microstructure characterization further revealed that the graphite structure in both two carbon fibers was disrupted due to ion irradiation. In contrast to M55J fibers, the ordering degree for T300 fibers increased at low dose range and diminished at higher doses. Possible mechanisms for the healing process occurring in T300 fibers were discussed. [Display omitted] •The competition between defect generation and defect recombination results in the healing process in T300 fibers.
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2022.112638