Fabrication of Multiple Oxidation-Resistant Coating on C/SiC Matrix
Oxidation-resistant coatings with gradient structures on C/SiC composites were fabricated.The gradient oxidation-resistant coatings were composed of three layers.The inner layer was reaction-bonded SiC which was fabricated by silicon infiltration.The middle layer was dense CVD SiC with the gradient component which was produced by the pyrolysis of methyltrichlorosilan (MTS) in excess hydrogen.The outer layer was a sealed layer with B4C and MoSi2 powders which was fabricated by slurry process.Optical microscope and SEM were used to observe the cross-section morphology and microstructure of coatings.XRD and EDS were used to characterize the phase composition and component distribution of coatings.EDS analysis showed the component distribution of CVD SiC coating changed significantly with the change of ratio of MTS to H2.The result indicated that C/SiC composite had good oxidation resistance when it was used at high temperature in the environment of high-speed combustion gas.
C/SiC composite Oxidation-resistant Coating Gradient component
Yanli Huo Yufeng Chen Jie Tang Hailin Liu ChunDeng Wang
China Building Materials Academy, Chaoyang District, Beijing, China, 100024
国际会议
The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))
哈尔滨
英文
406-408
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）