Al2O3-mullite-SiC-Al4SiC4 multi-composition coating for carbon/carbon composites

被引：37
作者：
Huang, JF
Zeng, XR
Li, HJ
Xiong, XB
Huang, M
机构：
[1] Northwestern Polytech Univ, Composites Technol Res Ctr CC, Xian 710072, Shanxi, Peoples R China
[2] Shenzhen Univ, Dept Mat Sci, Shenzhen 518060, Peoples R China
来源：
MATERIALS LETTERS | 2004年 / 58卷 / 21期
关键词：
carbon/carbon composites; coating; oxidation;
D O I：
10.1016/j.matlet.2004.03.046
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new type of oxidation-protective multi-composition coating for carbon/carbon (C/C) composites has been produced by a pack cementation technique in an argon atmosphere. XRD analyses shows that the phases of the composite coating are composed of Al2O3, mullite, SiC and Al4SiC4, and the bonding layer between the coating and C/C composites are composed of Al4C3, SiC and Al4SiC4. It is found by SEM surface observation and EDS area scanning analyses that the coating has two kinds of surfaces that are distinctly different in element content of Si and C. In the meantime, cross-section SEM observation of the coating also displays a dense microstructure. Oxidation test shows that the as-prepared coating characterized by excellent thermal shock resistance on the surface of C/C composites during exposure to an oxidizing atmosphere at 1773 K could effectively protect the C/C composites from oxidation for 41 h. (C) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：2627 / 2630
页数：4
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