综合搅拌铸造法和原位反应合成制备了 Al2 O3增强铝基复合材料 ,向熔体中直接加入 Al2 ( SO4) 3粉体 ,由该粉体反应分解的 Al2 O3原位合成铝基复合材料。用此方法制备复合材料 ,既可节约成本 ,同时由 Al2 ( SO4) 3分解的 SO3又可以对熔体进行精炼、除气。结果表明 ,Al2 O3颗粒和基体结合良好 ,没有发现气孔、团聚、集聚、偏析 ,克服了传统搅拌铸造所带来的铸造缺陷。Al2 O3弥散增强铝基复合材料具有良好的冲击韧性和耐磨性能 Al 2 O 3 reinforced Al matrix composites were prepared by a combination of stirring casting method and in-situ reaction. Al 2 (SO 4) 3 powder was directly added into the melt, and Al 2 O 3 synthesized by the powder reaction was used to synthesize aluminum matrix composites. In this way, the composite material can not only save the cost, but also the SO3 decomposed by Al2 (SO4) 3 can refine and degas the melt. The results show that the Al 2 O 3 particles are well bonded with the matrix, and no pores, agglomeration, agglomeration and segregation are found, thus overcoming the casting defects brought by the conventional stirring casting. Al2 O3 dispersion enhanced aluminum matrix composites with good impact toughness and wear resistance