文献类型：期刊文献

英文题名：3D needle-punched carbon/quartz fabric reinforced nanoporous phenolic composites with co-optimized mechanics, insulation and ablation

作者：Qian, Zhen[1];Cai, Hongxiang[1];Cao, Junxiang[1];Wang, Peng[1];Li, Liang[1];Cao, Yu[1];Zhang, Yayun[1];Niu, Bo[1];Long, Donghui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：36

外文期刊名：COMPOSITES COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000899666300003)】；

基金：Acknowledgments This work was supported by the National Natural Science Foundation of China (Nos. 22078100, 52102098 and 22008073) and China Post-doctoral Science Foundation (2022M711140) .

语种：英文

外文关键词：Phenolic composites; Thermal insulation; Mechanical properties; Ablation; In-situ X-ray micro-CT

摘要：Phenolic composites are the most reliable ablatives for thermal protection system, but integrating low density, good insulation and excellent mechanical/anti-ablation performance remains challenging. Here, a densityporosity trade-off method for synthesizing mid-density and high-strength phenolic composites is proposed. This method uses 3D needle-punched preforms to reinforce nanoparticle phenolic matrix. Proper compromise between porosity and density enables phenolic matrix to combine excellent thermal insulation and acceptable mechanical properties. And in-situ micro-CT results indicate that 3D needle-punched preforms can greatly improve the mechanical performance by restricting crack propagation from felt piles to woven piles. Furthermore, the mechanical, insulative and ablative properties can be optimized using hybrid carbon/quartz preforms. The resultant composites exhibit mid-densities of similar to 0.9 g/m(3) with integrated performance of high tensile strength (70-120 MPa), low thermal conductivity (0.08-0.12 W/(m.K) and good ablation resistance. These schemes will encourage the development of phenolic composites that can withstand different heat fluxes.