ZrO2-SiO2 gradient multilayer oxidation protective coating for SiC coated carbon/carbon composites

被引：59
作者：
Huang, HF
Zeng, XR
Li, HJ [1 ]
Xiong, XB
Sun, GL
机构：
[1] Northwestern Polytech Univ, CC Composites Technol Res Ctr, Xian 710072, Shaanxi, Peoples R China
[2] Shenzhen Univ, Dept Mat Sci, Shenzhen 518060, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2005年 / 190卷 / 2-3期
基金：
中国国家自然科学基金;
关键词：
carbon/carbon composites; oxidation; coating; sol-gel;
D O I：
10.1016/j.surfcoat.2004.02.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In order to eliminate the mismatch of thermal expansion coefficient between the ZrO2 outer layer and the internal bonding SiC layer, ZrO2-SiO2 composition-gradient transition layers were prepared by a sol-gel technique using tetraethoxysilane (TEOS) and zirconyl chloride as source materials. Energy dispersive spectroscopy (EDS) analysis displays that the gradient composition ZrO2-SiO2 outer coating could be obtained by immersing the SiC precoated carbon/carbon (C/C) composites into the gradient composition zirconia-silica sols (ZS sol) in turn. Oxidation test shows that, after 10 h oxidation in air at 1773 K, the weight loss of the gradient ZrO2-SiO2 coating coated SiC-C/C is only 1.97%. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：255 / 259
页数：5
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