Research progress in composition and preparation process of alumina fiber reinforced alumina ceramic matrix composites

The continuous alumina fiber reinforced alumina ceramic matrix composite (Al2O3f/Al2O3 ceramic matrix composite) have the characteristics of high melting point, high strength, oxidation resistance, etc., which improves oxidation resistance of the existing aerospace thermal components, and is an ideal candidate material for the application in high temperature and aerobic environment. In this paper, firstly, the constituents of Al2O3f/Al2O3 composites were analyzed, including reinforced fibers, ceramic matrix and interfacial materials. Moreover, the preparation processes of Al2O3f/Al2O3 ceramic matrix composites such as slurry infiltration, sol-gel method, precursor infiltration and pyrolysis method, were summarized. The influence of preparation process on the properties of alumina ceramic matrix composites was discussed and numerous achievements were listed. Lastly, feasible optimization schemes were proposed for the preparation of Al2O3f/Al2O3 ceramic matrix composites with high strength and fracture toughness under medium-high temperature load and long service period.