SiC Nanowires Toughed HfC Ablative Coating for C/C Composites

被引：42
作者：
Li, Hejun [1 ]
Wang, Yongjie [1 ]
Fu, Qiangang [1 ]
Chu, Yanhui [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2015年 / 31卷 / 01期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
Ablation performance; Carbon/carbon composites; Carbide; Nanowires; Ceramic coating; Corrosion resistance; Chemical vapor deposition; CARBON-CARBON COMPOSITES; CARBON/CARBON COMPOSITES; HAFNIUM CARBIDE; OXIDATION; MICROSTRUCTURE;
D O I：
10.1016/j.jmst.2014.03.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to improve ablation resistance of carbon/carbon ( C/C) composites, SiC nanowires were prepared on C/C composites surface in prior through chemical vapor reaction before HfC coating. SiC nanowires grew randomly and had good combination with HfC coating. SiC nanowires toughed HfC coating had lower linear and mass ablation rates than original HfC coating. The surface was much flatter and exhibited smaller cracks in center region. The ablation mechanism of HfC coating has been changed by SiC nanowires. Thicker HfO2 fused layer was formed on the surface of the toughed HfC coating, which could provide efficient protection for C/C composites. Therefore, SiC nanowires toughed HfC coating behaved in better ablation resistance.
引用
收藏
页码：70 / 76
页数：7
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