期刊
CERAMICS INTERNATIONAL
卷 44, 期 14, 页码 16583-16588出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.06.082
关键词
C/SiC; PIP; CVD; Oxidation; High temperature
资金
- National Natural Science Foundation of China [51602347]
- Planned Science and Technology Project of Hunan Province, China [2016TP1028]
Polymer infiltration pyrolysis (PIP) was used to prepare carbon fiber-reinforced silicon carbide (C/SiC) composites, and chemical vapor deposition (CVD) was employed to fabricate SiC coating. The oxidation behavior at 1700 degrees C and the flexural property at 1200 degrees C were tested. SiC coating exerted remarkable oxidation effects on PIP-C/SiC composites. In the absence of coating, PIP-C/SiC composites lost 29.2% of its mass, with merely 6.74% of the original flexural strength retained. In contrast, CVD-SiC coated PIP-C/SiC composites had the mass loss of 10.2% and the flexural strength retention ratio of 23.4%. In high-temperature tests, SiC coating played an important role in the flexural strength of PIP-C/SiC composites. The flexural strength of uncoated composites became 330.7 MPa, and that of coated ones reduced from 655.3 to 531.2 MPa.
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