期刊
CORROSION SCIENCE
卷 170, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108676
关键词
LSI; C/SiC composites; Residual silicon; Oxidation
资金
- National Natural Science Foundation of China [51575536]
- Natural Science Foundation of Hunan Province of China [2019JJ50768]
- Graduate degree thesis Innovation Foundation of Central South University [2019zzts855]
The influence of residual silicon in C/SiC composites on oxidation resistance of bilayer Yb2Si2O7/SiC coating in ambient air were investigated. Results indicated that new micro-crack caused by overflow of residual silicon from matrix in C/SiC composites is detrimental to the oxidation resistance of Yb2Si2O7/SiC coating at 1773 K. However, oxidation resistance of the bilayer coating at 1673 K can be improved because the SiO2 film induced by oxidation of residual silicon can self-heal micro-cracks in C/SiC composites. After removing residual silicon in C/SiC composites, the bilayer Yb2Si2O7/SiC coating has good oxidation resistance for C/SiC composites matrix at 1673 K and 1773 K.
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