Effect of Thermal Shock and Oxidation on Mechanical Property of Carbon/Carbon Composites with a Silicide Coating

被引：0
|
作者：
Fu Qiangang [1 ]
Li Hejun [1 ]
Li Kezhi [1 ]
Shi Xiaohong [1 ]
Huang Min [1 ]
机构：
[1] NW Polytech Univ, Composites Res Ctr, Lab Ultrahigh Temp Composites, Xian 710072, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷
基金：
中国国家自然科学基金;
关键词：
carbon/carbon composites; coating; mechanical properties; CARBON-CARBON COMPOSITES; PROTECTION;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A SiC whisker-toughened MOSi(2)-SiC-Si coating was prepared on carbon/carbon (C/C) composites surface by a two-step technique of slurry and pack cementation, and the effects of thermal shock and oxidation on the mechanical property of the coated C/C were studied. The flexural strength of C/C composites was improved by 6.8% after coated by SiC whisker-toughened MOSi(2)-SiC-Si. After thermal cycle between 1773 K and room temperature in air for 10 times, the mass loss of the coated sample was 5.08% and the percentage of remaining strength was 81.97%. After oxidation at 1773K in air for 60 min, the mass loss of the coated sample was 2.57% and the percentage of remaining strength was 89.63%. The decrease of the flexural strength during the thermal cycle and oxidation tests was primarily due to the oxidation of C/C substrate resulting from the cracking of coating.
引用
收藏
页码：37 / 40
页数：4
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