期刊
CORROSION SCIENCE
卷 169, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108621
关键词
C-f/SiBCN composites; Plasma ablation; Thermal damage mechanism
资金
- The National Key Research and Development Program of China [2016YFB0700202]
- CAS Pioneer Hundred Talents Program
- National Natural Science Foundation of China [51702341, 51872310]
- Taicang Science and Technology Project [TC2017DYDS21]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JSC031]
Ablation behavior and thermal damage mechanisms of C-f/SiBCN composites were investigated in plasma ablation flame under a heat flux of 4.02 MW/m(2), simulating a hypersonic service environment at similar to 2200 degrees C. Oxide layer formed on the composites surface effectively protects internal C-f/SiBCN composites from further ablation. However, the internal C-f/SiBCN composites endure severe thermal damage and complex reactions, leading to decomposition of SiBCN matrix and formation of alpha/beta-SiC, beta-Si3N4 grains, amorphous C layer and ring-like SiC layer. Based on detailed microstructure and phase composition analysis, thermal damage and microstructure evolution mechanisms of C-f/SiBCN composites during plasma ablation are clarified.
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