The microstructure evolution in a SiCf/SiC composite under triple ion beam irradiation
作者： Chao Ye , Jiaxiang Xue , Tong Liu , Rui Shu , Yan Yan
DOI: 10.1016/J.CERAMINT.2019.12.266
关键词:
摘要: Abstract Simultaneous H, He and Fe ion beam irradiations were conducted on a pyrolytic carbon (PyC) - SiCf/SiC composite at 475 °C with the peak displacement damage level up to 47 dpa concentrations of H 38 3400 appm, What respectively. Cross-sectional transmission electron microscopy was used study evolution microstructure after triple irradiation. Results show that interface between SiC fiber PyC interphase cracked The could infiltrate into multilayer coating cause deformation due volume expansion. After irradiation, no obvious cavities observed in matrix, while bubbles as large 15 nm diameters region coating/PyC interface. Hydrogen promotes nucleation growth by reducing their surface energy. formation process is discussed.
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