C/SiC/Mo–Si–Cr multilayer coating for carbon/carbon composites against oxidation at high temperature
C/SiC/Mo–Si–Cr multilayer coating for carbon/carbon composites against oxidation at high temperature
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DOI：
10.1016/j.corsci.2012.05.023
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发表时间：
2012-10
影响因子：
8.3
通讯作者：
Yulei Zhang;Wen-Ying Zeng;Hejun Li;Kezhi Li
中科院分区：
文献类型：
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作者：
Yulei Zhang;Wen-Ying Zeng;Hejun Li;Kezhi Li
采用包埋渗法和料浆法制备了C/C复合材料的C/SiC/Mo-Si-Cr多层防高温氧化涂层。氧化试验结果表明，该涂层在1873 K空气中氧化300 h后，可保护C/C复合材料免受氧化，并能承受1873 K至室温的40次热循环。涂层在两种试验中均保持完整，未发现明显的失效现象，涂层良好的抗氧化性和抗热震性主要是由于氧化过程中涂层表面形成了致密的玻璃膜。
A C/SiC/Mo–Si–Cr multilayer coating for carbon/carbon (C/C) composites against oxidation at high temperature was prepared by pack cementation and slurry method. Oxidation test results showed that the coating could protect C/C composites from oxidation at 1873K in air for 300h and withstand 40 thermal cycles between 1873K and room temperature. The coating remained intact during the two kinds of tests and no obvious failure was found. The good oxidation and thermal shock resistance of the coating is attributed mainly to the formation of dense glass film on the coating during the oxidation test.