Ablation resistance of HfB2-SiC coating prepared by in-situ reaction method for SiC coated C/C composites

被引：55
作者：
Wang, Peipei [1 ]
Li, Hejun [1 ]
Jia, Yujun [1 ]
Zhang, Yulei [1 ]
Yuan, Ruimei [1 ]
机构：
[1] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2017年 / 43卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Carbon/carbon composites; HfB2-SiC; Ablation resistance; HIGH-TEMPERATURE CERAMICS; CARBON-BASED MATERIALS; OXIDATION RESISTANCE; CARBON/CARBON COMPOSITES; IMPROVE; LAYER;
D O I：
10.1016/j.ceramint.2017.06.052
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To improve the ablation resistance of SiC coating, HfB2-SiC coating was prepared on SiC-coated carbon/carbon (C/C) composites by in-situ reaction method. Owing to the penetration of coating powders, there is no clear boundary between SiC coating and HfB2-SiC coating. After oxyacetylene ablation for 60 s at heat flux of 2400 kW/m(2), the mass ablation rate and linear ablation rate of the coated C/C composites were only 0.147 mg/s and 0.267 pm/s, reduced by 21.8% and 60.0%, respectively, compared with SiC coated C/C composites. The good ablation resistance was attributed to the formation of multiple Hf-Si-O glassy layer including SiO2, HfO2 and HfSiO4.
引用
收藏
页码：12005 / 12012
页数：8
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