Microstructure and ablation behavior of C/C-HfC composites prepared by precursor infiltration and pyrolysis

被引：94
|
作者：
Xue, Liang [1 ]
Su, Zhe-an [1 ]
Yang, Xin [1 ]
Huang, Dong [1 ]
Yin, Teng [1 ]
Liu, Chunxuan [1 ]
Huang, Qizhong [1 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
来源：
CORROSION SCIENCE | 2015年 / 94卷
基金：
中国国家自然科学基金;
关键词：
Ceramic matrix composites; SEM; High temperature corrosion; CARBON/CARBON COMPOSITES; ZIRCONIUM CARBIDE; HAFNIUM CARBIDE; OXYACETYLENE FLAME; SIC INTERPHASE; OXIDATION; RESISTANCE;
D O I：
10.1016/j.corsci.2015.01.053
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
C/C-HfC composites were prepared by precursor infiltration and pyrolysis using HfC precursor. The microstructure, mechanical properties, and ablation behavior were investigated. The C/C-HfC composites showed good ablation resistance with a surface temperature over 2573 K during ablation. The ablation process was divided into two steps, with the ablation rate dominated by various mechanisms. During ablation, tree-coral-like HfO2 particles formed and functioned as thermal barrier, and the HfCxOy phase acted as oxygen diffusion barrier, protecting the composites from further ablation. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：165 / 170
页数：6
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