连续氧化铝纤维增强氧化铝复合材料（Al₂O_3f/Al₂O₃）是发展高性能航空发动机热端部件的理想材料。本工作研究了国产Al₂O_3f/Al₂O₃复合材料的室温和1000 ℃拉伸力学性能，使用SEM观察拉伸试样的微观形貌和断口形貌，使用TEM观察纤维的微观结构，采用Weibull分布统计分析抗拉强度，利用纤维推入法得到纤维/基体界面剪切强度。结果表明，国产Al₂O_3f/Al₂O₃复合材料室温抗拉强度为（257±31） MPa，1000 ℃的抗拉强度为室温的78%，已达到国际Nextel610/Al₂O₃水平。研究发现，界面结合强度是影响抗拉强度的主要因素。界面结合强度较低，纤维拔出长且分散，抗拉强度高；界面结合强度较高，发生纤维束断裂，且纤维拔出变短，抗拉强度低。

Continuous alumina fiber reinforced alumina composite （Al₂O_3f/Al₂O₃） is an ideal material for developing high-performance aero-engine hot section components. In this study， the room-temperature and 1000 ℃ tensile mechanical properties of domestic Al₂O_3f/Al₂O₃ are investigated. The microscopic morphology and fracture morphology of tensile specimens are observed by SEM. The microstructure is observed by TEM. The tensile strength is analyzed using the Weibull distribution， and the fiber/matrix interfacial shear strength is obtained by the fiber push-in method. The results show that the room-temperature tensile strength of domestic Al₂O_3f/Al₂O₃ is （257±31） MPa while the tensile strength at 1000 ℃ is 78% of room temperature strength， reaching the level of foreign Nextel610/Al₂O₃. The interfacial bonding is the main factor affecting the tensile strength. High tensile strength with low interfacial bonding strength， results in long and dispersed fiber pull-out. Low tensile strength with high interfacial bonding strength， results in fiber bundle breakage and shorter fiber pull-out.