Ablation mechanism and properties of SiCf/SiBCN ceramic composites under an oxyacetylene torch environment

作者：Wang, Jiaying; Duan, Xiaoming; Yang, Zhihua; Jia, Dechang^*; Zhou, Yu

来源：Corrosion Science, 2014, 82: 101-107.

DOI：10.1016/j.corsci.2014.01.006

• Ceramic matrix composites
• SEM
• High temperature corrosion

Ablation mechanism and properties of SiCf/SiBCN ceramic composites under an oxyacetylene torch ablation environment were investigated. Ablation products mainly consist of amorphous SiO2 glass and cristobalite. Four time-dependent ablation actions contribute to the various ablation regions: oxidations of SiC fibers and SiBCN matrix, erosion of SiC fibers in the center region, evaporation of SiO(g) and B2O3(g), and high-viscosity SiO2 liquid flowing with ablation gas-stream. Meanwhile, the mass ablation rate and linear ablation rate of SiCf/SiBCN are notably lower than those of C-f/SiBCN.

• 出版日期2014-5
• 单位哈尔滨工业大学