Effect of mullite content on microstructure and ablation behavior of mullite modified C/C-SiC-HfC composites

被引：11
|
作者：
Tan, Qing [1 ]
Jiao, Xiaoyang [1 ]
He, Qinchuan [1 ]
Wang, Yiqun [1 ]
Yin, Xuemin [2 ]
机构：
[1] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China
[2] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 222卷
基金：
中国国家自然科学基金;
关键词：
C; C-SiC-HfC composites; Mullite; Precursor infiltration and pyrolysis; Microstructure; Ablation behavior; REACTIVE MELT INFILTRATION; CARBON/CARBON COMPOSITES; PRECURSOR INFILTRATION; RESISTANCE; OXIDATION; MECHANISM; COATINGS;
D O I：
10.1016/j.corsci.2023.111405
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mullite modified C/C-SiC-HfC composites were prepared via precursor infiltration and pyrolysis (PIP). The effects of mullite modification with different contents on the composition, microstructure, and ablation behavior of the composites were investigated. Results showed that inadequate and excessive mullite limited the improvement of the ablation resistance. At 8.88 wt% mullite, the composites exhibited relatively good ablation resistance with mass and linear ablation rates of 0.44 mg/s & BULL;cm2 and 6.39 & mu;m/s. The addition of moderate mullite content promoted the formation of a dense Hf-Si-O multiphase oxide layer on the ablated surface without causing an excessive increase in surface temperature.
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收藏
页数：13
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