SiCf/SiC纺织复合材料细观结构及力学性能研究进展

Research progress on meso-structure and mechanical properties of SiCf/SiC textile composites

碳化硅纤维增强碳化硅基体(SiCf/SiC)纺织复合材料具有结构设计性强、密度低、力学性能优异、耐高温和抗氧化性好等优势,成为航空发动机热端高温部件理想的候选结构材料。然而,目前对SiCf/SiC纺织复合材料的制备技术、性能、细观表征等方面开展的研究较少,但从长远来看,它仍是我国航空发动机制造必须开展研究的方向。本文针对SiCf/SiC纺织复合材料,围绕其细观结构、力学性能实验表征和数值模拟分析等三个方面,概述了SiCf/SiC纺织复合材料近几年的研究现状,综合对比国内外应用基础研究,虽然国内在制备技术方面取得了很大的进展,达到了国际先进水平,但是在构件考核验证和应用方面尚处于起步阶段,只有在可靠性、耐久性、工艺及性能综合平衡的基础上优化,实现材料与工艺、结构与设计的协同,才能在航空发动机未来发展中取得突破。

SiCf/SiC textile composites have enormous development potentials in the field of aerospace hot-end component owing to their strong structural design,low density,excellent mechanical properties,high-temperature resistance and oxidation resistance.However,there are few researches on the preparation technology,performance and meso-structure of SiCf/SiC textile composites.In the long run,it is still the research direction that must be carried out in country’s aviation engine manufacturing.In this paper,the research status of SiCf/SiC textile composites in recent years is introduced from three aspects:meso-scale structure,mechanical properties and numerical simulation.The research status of SiCf/SiC textile composites in recent years is summarized,and the basic research of domestic and foreign applications is comprehensively compared.Although the domestic preparation technology has made great progress and reached the international advanced level,it is still in its infancy in terms of component assessment and verification and application.Only by optimizing on the basis of the comprehensive balance of reliability,durability,process and performance,and realizing the synergy of materials and processes,structure and design,can breakthroughs be made in the future development of aeroengines.