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

被引：90
|
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
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 10期
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.
引用
收藏
页码：4760 / 4763
页数：4
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