Dynamic anti-oxidation behaviour of MoSi2/SiC coating system for carbon-carbon composites

被引：0
|
作者：
Zeng, Xierong [1 ]
Li, Hejun [2 ]
Li, Long [2 ]
Li, Ailan [2 ]
机构：
[1] Shenzhen Univ., Shenzhen 518060, China
[2] Northwestern Polytech. Univ., Xi'an 710072, China
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2002年 / 19卷 / 06期
关键词：
Ceramic coatings - High temperature properties - Molybdenum compounds - Oxidation - Silicon carbide;
D O I：
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中图分类号：
学科分类号：
摘要：
In the present work, the dynamic anti-oxidation behavior and the damage mechanism of MoSi2-SiC multilayer ceramic coating for carbon-carbon composites were investigated experimentally at various temperatures of 1100-1500°C with the test for gas jet washout. Experimental data of dynamic oxidation show that the mass loss of MoSi2/SiC coated carbon-carbon composites decreases, and the ability of oxidation resistance is enhanced with the raise of the gas temperature up to 1500°C. The mechanism of dynamic oxidation and the concept of the integrity of the coating layer are explained from the mass transportation theory and the gas jet washout damage. In this respect, the dynamic oxidation behaviour differs from the static oxidation. The results show that the MoSi2/SiC ceramic coating for carbon-carbon composites can provide the dynamic oxidation protection to C/C composites at temperatures up to 1500°C in a gas jet environment.
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页码：43 / 46
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