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采用粉末冶金法成功制备了原位生成陶瓷相增强 Ａｌ基复合材料．应用 Ｘ射线衍射仪进行了物相组成测试，发现含１０％～２０％（重量百分比）ＳｉＯ２复合材料的最终物相均为ＭｇＡｌ２Ｏ４、 ＭｇＯ、 Ｍｇ２Ｓｉ、 Ｓｉ和Ａｌ．研究了ＳｉＯ２含量对复合材料硬度、密度、电导率、抗压强度、摩擦磨损等性能的影响表明，随ＳｉＯ２含量的增加，复合材料的硬度和密度增加，电导率、抗压强度和体积磨损量减小，而摩擦系数却增加．
In situ preparation of ceramic phase reinforced Al matrix composites was successfully prepared by powder metallurgy. The phase composition of the composites was found to be MgAl2O4, MgO, Mg2Si, Si and Al with 10% ~ 20% (weight percent) SiO2 composites by X-ray diffractometer. The effects of SiO2 content on the properties of composite such as hardness, density, electrical conductivity, compressive strength and friction and wear were studied. It is found that with the increase of SiO2 content, the hardness and density of the composites increase, and the electrical conductivity, compressive strength and volume wear Decrease, but the friction coefficient increases.