Ablative property of HfC-based multilayer coating for C/C composites under oxy-acetylene torch

被引:88
|
作者
Yong-Jie, Wang [1 ]
He-Jun, Li [1 ]
Qian-Gang, Fu [1 ]
Heng, Wu [1 ]
Dong-Jia, Yao [1 ]
Bing-Bo, Wei [2 ]
机构
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, Sch Sci, Xian 710072, Peoples R China
基金
中国国家自然科学基金;
关键词
Ablation; HfC; C/C composites; Chemical vapor deposition; MICROSTRUCTURE;
D O I
10.1016/j.apsusc.2010.11.020
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To improve ablation resistance of C/C composites, HfC-based coating and SiC coating were prepared on the surface of C/C composites by chemical vapor deposition. The coating exhibits dense surface and outstanding anti-ablation ability. Compared with uncoated C/C, the linear and mass ablation rates of the coated C/C decreased by 33.3% and 66.7%, respectively, after ablation for 20 s. The residual oxides can prevent oxygen from diffusing inwardly; large amounts of heat can be taken away by the gas generated during ablation, which is also helpful for protection. (C) 2010 Elsevier B. V. All rights reserved.
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页码:4760 / 4763
页数:4
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