Enhanced Ablation Resistance of Carbon Fiber Reinforced Phenolic Composites Through Designing In-Plane Heat Conduction And Out-of-Plane Heat Insulation Channels

作     者：Chen, Xiang Shi, Kui Gu, Ziwen Quan, Huafeng Huang, Dong Zhang, Yuefeng Li, Tongqi Ye, Chong Fan, Zhen Zhu, Shipeng Liu, Jinshui Peng, Chaoyi Tao, Lei 

作者机构：College of Materials Science and Engineering Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Changsha410082 China Hunan Province Engineering Research Center for High Performance Pitch-based Carbon Materials Hunan Toyi Carbon Material Technology Co. Ltd. Changsha410000 China Key Laboratory of Advanced Functional Composite Materials Aerospace Research Institute of Materials and Processing Technology Beijing100076 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China Zhuzhou Times New Material Technology Co. Ltd. Zhuzhou412007 China China Academy of Launch Vehicle Technology China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Ablation 

摘      要：With the development of near-space vehicles toward higher Mach speeds, the aerodynamic heating problem poses an increasingly serious challenge to thermal protection system, and thus it is urgent to further improve the ablation resistance of carbon fiber reinforced phenolic resin (CF/PR). To achieve this, an innovative composite was prepared using mesophase-pitch-based carbon fiber as a reinforcement to construct the in-plane heat transfer channels. The thermal conductivities of composite in in-plane (λi) and out-of-plane (λo) directions were 24.37 W·m-1·K-1 and 0.96 W·m-1·K-1, respectively, and the ratio(λi/λo) is up to 25.39, which plays a positive role in enhancing the heat dissipation of ablation center while maintaining effective interlayer insulation. During ablation, the composite exhibits a 159 °C lower stagnation-point temperature compared to the control group, and the maximum and average temperature on its backside decrease 196 °C and 201 °C, respectively. Consequently, the mass ablation rate and the line ablation rate of composite are reduced by 72.5% and 87.6%, respectively. The anisotropic thermal behavior and higher λi/λo value contribute to the decrease of the stagnation-point temperature, the maximum temperature and the average temperature on the backside, thereby improving the ablation resistance of composite. © 2024, The Authors. All rights reserved.