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本文对液体浸渗法制备的（Al2O3—SiO2）sf／Al—Si复合材料界面反应进行了研究．采用化学反应涂层处理的方法，在Al2O3—SiO2短纤维表面涂覆一层非晶态的SiO2，从而改变纤维与基体的结合方式，使界面由熔解结合转变为反应结合，并产生了MgAl2O4界面反应相．MgAl2O4相的大小和分布对复合材料的力学性能产生重要影响：MgAl2O4在界面呈非连续的块状分布时，复合材料强度最高；当界面反应剧烈，MgAl2O4在界面呈连续分布时，复合材料强度将大幅度下降．通过对界面反应时间和温度的控制，可以对界面的微观结构进行有效调整，使复合材料获得界面性能较好的非连续反应结合界面．
In this paper, the interface reaction of (Al2O3-SiO2) sf / Al-Si composites prepared by liquid infiltration method was studied. The method of chemical reaction coating is used to coat the surface of Al2O3-SiO2 staple fiber with a layer of amorphous SiO2 to change the bonding mode between the fiber and the substrate, and the interface is changed from melting to reactive bonding, and a MgAl2O4 interface Reaction phase. The size and distribution of MgAl2O4 phase have an important influence on the mechanical properties of the composites: MgAl2O4 exhibits the highest strength when the interface is discontinuous, and the strength of the composite increases when the interface reaction is intense and MgAl2O4 is continuously distributed at the interface Dropped significantly. By controlling the interface reaction time and temperature, the microstructure of the interface can be effectively adjusted so that the composite material can obtain the non-continuous reaction interface with better interface performance.