新型超高温轻量化碳陶瓷瓦防隔热一体化设计、表征及原位强韧化机理

Based on the demands of key fundamental and scientific problem such as lightweight，high reliability，strengthen-toughening, integrated thermal protection and heat insulation for novel aerospace vehicles，this project will carry on the research of the design of integrated thermal protection and heat insulation, characterization and in-situ strengthen-toughening mechanisms. The main research contents concerns novel carbon-ceramic tile heat transfer, components, microstructure and strengthen-toughening mechanisms, fabrication, thermodynamic coupling and experimental identification and assessment. This project will carry on the following researching: (1) Heat transfer mechanism and thermal insulation design for novel lightweight carbon-ceramic tile; (2) Strengthen-toughening design and mechanism for novel lightweight carbon-ceramic tile; (3) Thermal protection-insulation efficiency, key mechanical properties and failure characterization for novel lightweight carbon-ceramic tile. The research achievements of this project will supply research foundation and technical supporting for large areas，ultra-high temperature resistant，lightweight and thermal-insulation integrated TPS in the field of aerospace vehicles.

本项目围绕新型航空航天飞行器的热防护材料对轻量化、强韧化、高可靠性、防隔热一体化需求的关键性基础问题，系统和深入开展新型超高温轻量化碳陶瓷瓦的防热隔热一体化设计、表征及原位强韧化机理研究。研究内容主要涉及到新型碳陶瓷瓦的传热、组分、微观结构和原位增韧设计及原位韧化机理，材料制备，以及力学、热力耦合和试验验证及评价等。本项目拟开展以下研究：（1）新型轻量化碳陶瓷瓦的传热机理与隔热设计；（2）新型轻量化碳陶瓷瓦的高温原位强韧化方法与强韧化机理；（3）新型轻量化碳陶瓷瓦的防隔热效率、关键力学性能与失效表征。本项目的研究将为我国新型航空航天飞行器的大面积耐超高温防隔热一体化热防护材料的应用研究提供理论储备和技术支持。

本项目开展了新型超高温轻量化碳陶瓷瓦的防热隔热一体化设计、表征及原位强韧化机理研究。构建了随机纤维排布多相结构传热模型，揭示其微细观传热机理，新型碳陶瓷瓦的原位韧化机理。建立了新型碳陶瓷瓦的力学性能与失效的表征方法，获得了新型超高温轻量化碳陶瓷瓦的制备工艺和原位自生长碳纳米管的增韧方法。给出了新型结构的碳陶瓷瓦的传热分析范例，碳陶瓷瓦的制备工艺、性能数据为新型热防护材料的制备提供技术储备。此外，本项目组在国际知名学术期刊上发表SCI论文10篇，项目负责人协助培养博士研究生5名。所研究的成果将为我国新型航空航天飞行器的大面积耐超高温防隔热一体化热防护材料的应用研究提供理论储备和技术支持。