国外多孔基体氧化铝/氧化铝复合材料工程应用进展

Progress in porous-matrix Al2O3/Al2O3 composites for engineering applications

摘要:

氧化铝/氧化铝复合材料(Al2O3/Al2O3)是20世纪90年代兴起的一类连续陶瓷纤维增强陶瓷基复合材料，已经发展为与SiC/SiC、C/SiC等非氧化物陶瓷基复合材料并列的一类陶瓷基复合材料。与非氧化物陶瓷基复合材料相比，Al2O3/Al2O3具有长时抗氧化、高温耐腐蚀、低成本等独特优势，已经在航空发动机、地面燃气轮机等军民两用热结构材料领域展现出广阔的应用前景。本文从材料应用的角度出发，系统分析阐述了目前在Al2O3/Al2O3占主导地位的多孔基体Al2O3/Al2O3(P-Al2O3/Al2O3)的增韧机制、成型工艺和性能特点，重点归纳了国外近年来P-Al2O3/Al2O3的工程化应用进展及前景，最后指出了P-Al2O3/Al2O3存在的局限性并展望了未来发展方向，旨在为国内Al2O3/Al2O3体系发展提供借鉴和参考。

Abstract:

As one type of continuous ceramic fiber reinforced ceramic matrix composites that emerged in the 1990s, alumina/alumina composites (Al2O3/Al2O3) have become a major category of ceramic matrix composites alongside C/SiC, SiC/SiC, etc. Compared with non-oxide ceramic matrix composites, Al2O3/Al2O3 possess unique advantages such as long-term oxidation resistance, high-temperature corrosion resistance and low cost etc, and display broad application prospects in the field of military and civilian thermal structural materials such as aircraft engines and gas turbines. This paper focuses on the research process of porous matrix Al2O3/Al2O3 (P-Al2O3/Al2O3), especially the engineering applications in recent years, and has reference significance for the future development of Al2O3/Al2O3 system in domestic. Finally, the key problems and the future development proposals of P-Al2O3/Al2O3 are summarized.