Influence of precursor content on the microstructure and ablative resistance of CLVD-C/C-SiC-ZrC composites

被引：6
作者：
He, Qinchuan [1 ,2 ]
Jiao, Xiaoyang [2 ]
Wang, Yiqun [2 ]
Yin, Xuemin [3 ]
机构：
[1] State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Sichuan, Peoples R China
[2] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China
[3] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 225卷
基金：
中国国家自然科学基金;
关键词：
CLVD process; Precursor content; C/C-SiC-ZrC; Microstructure; Ablative resistance; CHEMICAL-VAPOR INFILTRATION; CARBON/CARBON COMPOSITES; THERMAL-EXPANSION; OXYACETYLENE TORCH; BONDING STRENGTH; BEHAVIOR; MECHANISM; MATRIX; COEFFICIENT; TEMPERATURE;
D O I：
10.1016/j.corsci.2023.111584
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Precursor content is a key to control ablation resistance of CLVD-C/C-SiC-ZrC composites. The ceramic content of the composites prepared with 20 wt% precursor was only 8.38 vol%, so an oxide protective coating was not formed. High-content precursors promoted the formation of oxide coating, especially the composites prepared with 50 wt% precursor had a complete oxide coating. Thus, mass and line ablation rates were only 0.64 mg/s and 0.45 mu m/s. When precursor content was 65 wt%, the composites had high-content ceramics, but porosity was great and many pores and cracks acted as channels for oxygen diffusion, causing a poor ablation resistance.
引用
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页数：15
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