文献类型：期刊文献

英文题名：Lightweight Silicone Aerogel-Based Ceramic Composites with Integrated Non-Ablative and Ablative Characteristics for Reusable Thermal Protection System

作者：Tian, Hao[1,3]; Dong, Xiao[1]; Niu, Bo[1,2,4]; Su, Zhe[2]; Yan, Aoqing[1]; Liang, Xiubing[3]; Xing, Yue[3,5]; Luo, Yi[2]; Long, Donghui[1,2]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Structural Materials Research Department, Suzhou Laboratory, Suzhou, 215000, China; [3] Defense Innovation Institute, Academy of Military Science, Beijing, 100071, China; [4] Harbin Institute of Technology, China; [5] Southeast University, China

年份：2025

外文期刊名：SSRN

收录：EI(收录号：20250303427)

语种：英文

外文关键词：Ablation - Ablative materials - Aerogels - Ceramic materials - Cost effectiveness - Fracture mechanics - Linear transformations - Silica

摘要：Rigid fibrous ceramics (RFCs), as conventional non-ablative materials for reusable thermal protection systems (TPS), are greatly limited by their brittleness and insufficient thermal tolerance. Herein, we present the development of nanoporous silicone-based ceramic composites (NSCC) by integrating RFCs with high-strength organosilane aerogels, yielding a cost-effective reusable TPS material with combined non-ablative stability and ablative resilience. The mechanical properties, high-temperature insulation, ablation resistance, and reusability of the material are systematically evaluated. Notably, NSCC exhibits a threefold increase in compressive strength compared to RFCs, attributed to the protective effect of the organosilane matrix on fiber bonding areas, as visualized by in-situ X-ray micro-CT. Additionally, NSCC exhibits superior aerogel-type insulation and high-temperature reusability, with negligible mass loss and dimensional change after 10 cycles of 1000 °C radiation heating for 1000 seconds each. Furthermore, NSCC demonstrates significantly enhanced ablation resistance, exhibiting no ablative recession up to 1400 °C and a slight linear recession rate of 3.5 μm·s-1 at 2000 °C. These exceptional properties of NSCC should be attributed to the high-silica-content organosilane aerogels, which could form a thermally stable ceramic structure through high-temperature organic-inorganic transformation reactions. ? 2025, The Authors. All rights reserved.