【摘要】 超高温陶瓷(UHTCs)因在高超声速飞行器热防护领域的巨大应用前景而备受关注,而脆性大、烧结成型困难是制约UHTCs广泛应用的实质问题。将碳纤维与UHTCs复合获得碳纤维增强超高温陶瓷基复合材料(C_f/UHTCs)是克服这一问题的可靠方案。近10年来,我国在C_f/UHTCs工程应用方面获得了重大突破,取得了一系列具有世界先进水平的应用成果。然而,由于C_f/UHTCs制备过程复杂,服役环境苛刻(> 2000℃,> 5 Ma气流冲刷),在结构演化、性能机理等方面仍存在一些关键科学问题亟需明确。综述了C_f/UHTCs在基体改性、氧化烧蚀机理、高温力学行为等方面的研究进展,并结合本团队的研究工作对C_f/UHTCs的研究趋势进行了总结和展望,旨在为进一步推动C_f/UHTCs的研究和发展提供参考。更多还原

【Abstract】 Ultra-high temperature ceramics( UHTCs) have received great attention due to their application potentials in the thermal protection system of hypersonic vehicles. The major problems that restrict the wide application of UHTCs are high brittleness and difficulty to be sintered. Introduction of carbon fiber into UHTCs to obtain fiber reinforced UHTCs( C_f/UHTCs) is an effective solution to these problems. In the past 10 years,our country has made major breakthroughs in the engineering application of C_f/UHTCs and obtained a series of world-class achievements. However, because of the complicated preparation process and harsh service environment( >2000 ℃,>5 Ma airflow scouring),C_f/UHTCs still exist several critical scientific issues need to be clarified,especially in terms of structural evolution and performance mechanisms.reviews The research progress on matrix modification,oxidation-ablation mechanism and high-temperature mechanical properties of C_f/UHTCs was reviewed. Also,the future research trends of C_f/UHTCs based on the recent research results of our group were summarized and prospected. This paper provides a reference for further research and development of C_f/UHTCs.更多还原