Insights into irradiation-affected structural evolution and mechanical behavior of amorphous carbon

Shi, Yeran; Xia, Qiaosheng; Xie, Mingda; Zhou, Qing; Hua, Dongpeng; Chai, Liqiang; Shi, Tan; Eder, Stefan J.; Wang, Haifeng; Wang, Peng; Liu, Weimin

doi:10.1016/j.actamat.2024.120424

articleActa MaterialiaSep 21, 2024HYBRID OA

Insights into irradiation-affected structural evolution and mechanical behavior of amorphous carbon

YSYeran Shi QXQiaosheng Xia MXMingda Xie QZQing Zhou DHDongpeng Hua

Northwestern Polytechnical University · Chinese Academy of Sciences · +4 more institutions

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Abstract

The distinctive hybridization structure of amorphous carbon (a-C) imparts remarkable mechanical and tribological characteristics, making it highly relevant for lubrication applications, particularly in critical sectors such as nuclear energy. In this work, we employed molecular dynamics simulations to examine the effects of irradiation on the structural evolution and mechanical behavior of a-C. The findings indicate that with increasing irradiation doses, the short-range order within the a-C is disrupted, leading to a substantial increase in sp 2 hybridization. Then, nanoindentation simulations revealed a reduction in both hardness and elastic modulus as a consequence of irradiation damage, associated with the…

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Keywords

Materials science
Amorphous solid
Irradiation
Carbon fibers
Amorphous carbon
Composite material
Chemical engineering
Nanotechnology

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