SiC/Si-W-Mo coating for protection of C/C composites at 1873 K

查看全文 作　　者：Dangshe Hou Kezhi Li Hejun Li Qiangang Fu Yulei [1]Zhang

机构地区：[1]National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China

出　　处：《Journal of University of Science and Technology Beijing》索引2008年第15卷第6期,共5页

基　　金：supported by the Major State Basic Research and Development Program of China (No.2006CB600908) 摘　　要：In order to prevent carbon/carbon composites from oxidation at 1873 K, an efficient oxidation protective SiC/Si-W-Mo coating was prepared by a two-step pack cementation technique. The microstructures and the phase composition of the as-received multi-coating were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It is seen that the compact multi-coating is composed of α-SiC, Si, and (WxMo1-x)Si2. Oxidation test shows that, after oxidation at 1873 K in air for 102 h and thermal cycling between 1873 K and room temperature for 10 times, the weight loss of the SiC/Si-W-Mo coated C/C composites is only 0.26%. The invalidation of the multi-coating is attributed to the formation of penetrable cracks in the coating. 关键词：衣料 SEM C/C混合物微观结构氧化保护

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SiC/Si-W-Mo coating for protection of C/C composites at 1873 K

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