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

被引：1

作者：

Hou, Dangshe ^{[1
]}

Li, Kezhi ^{[1
]}

Li, Hejun ^{[1
]}

Fu, Qiangang ^{[1
]}

Zhang, Yulei ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Natl Key Lab Thermostruct Composite Mat, Xian 710072, Peoples R China

来源：

JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING | 2008年 / 15卷 / 06期

关键词：

C/C composites; coating; microstructure; oxidation protection;

D O I：

10.1016/S1005-8850(08)60294-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 alpha-SiC, Si, and (WxMo1-x)Si-2. 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. (C) 2008 University of Science and Technology Beijing. All rights reserved.

引用

页码：822 / 826

页数：5

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