1. Ablation Behavior of the SiC-Coated Three-Dimensional Highly Thermal Conductive Mesophase-Pitch-Based Carbon-Fiber-Reinforced Carbon Matrix Composite under Plasma Flame.
- Author
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Ye, Chong, Huang, Dong, Li, Baoliu, Yang, Pingjun, Liu, Jinshui, Wu, Huang, Yang, Jianxiao, and Li, Xuanke
- Subjects
CARBON fibers ,CARBON composites ,FLAME ,MESOPHASES ,THERMAL conductivity - Abstract
This study is focused on a novel high-thermal-conductive C/C composite used in heat-redistribution thermal protection systems. The 3D mesophase pitch-based carbon fiber (CF
MP ) preform was prepared using CFMP in the X (Y) direction and polyacrylonitrile carbon fiber (CFPAN ) in the Z direction. After the preform was densified by chemical vapor infiltration (CVI) and polymer infiltration and pyrolysis (PIP), the 3D high-thermal-conductive C/C (CMP /C) composite was obtained. The prepared CMP /C composite has higher thermal conduction in the X and Y directions. After an ablation test, the CFPAN becomes needle-shaped, while the CFMP shows a wedge shape. The fiber/matrix and matrix/matrix interfaces are preferentially oxidized and damaged during ablation. After being coated by SiC coating, the thermal conductivity plays a significant role in decreasing the hot-side temperature and protecting the SiC coating from erosion by flame. The SiC-coated CMP /C composite has better ablation resistance than the SiC-coated CPAN /C composite. The mass ablation rate of the sample is 0.19 mg·(cm−2 ·s−1 ), and the linear ablation rate is 0.52 μm·s−1 . [ABSTRACT FROM AUTHOR]- Published
- 2019
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