Multilayer oxidation resistant coating for SiC coated carbon/carbon composites at high temperature

被引：19

作者：

He-Jun, Li ^{[1
]}

Geng-Sheng, Jiao ^{[1
]}

Ke-Zhi, Li ^{[1
]}

Chuang, Wang ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, C C Composites Technol Res Ctr, Xian 710072, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 475卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

carbon/carbon composites; coating; oxidation;

D O I：

10.1016/j.msea.2007.04.053

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To prevent carbon/carbon (C/C) composites from oxidation, a multilayer coating based on molybdenum disilicide and titanium disilicide was formed using a two-step pack cementation technique in argon atmosphere. XRD and SEM analysis showed that the internal coating was a bond SiC layer that acts as a buffer layer, and that the external multilayer coating formed in the two-step pack cementation was composed of two MoSi2-TiSi2-SiC layers. This coating, which is characterized by excellent thermal shock resistance, could effectively protect the composites from exposure to an oxidizing atmosphere at 1773 K for 79 h. The oxidation of the coated C/C composites was primarily due to the reaction of C/C matrix and oxygen diffusing through the penetrable cracks in the coating. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：279 / 284

页数：6

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