【摘要】 本研究采用一种新型的原位反应工艺，使ＴｉＯ２粉剂与纯铝熔体反应，生成Ａｌ３Ｔｉ颗粒，然后采用搅拌铸造法制备Ａｌ／Ａｌ３Ｔｉ复合材料。生成的Ａｌ３Ｔｉ颗粒尺寸细小，为２～３μｍ，而且分布均匀，与基体结合好。当ＴｉＯ２加入量为纯铝基体的３０ｗｔ％、反应温度为９２０℃时，复合材料的抗拉强度比纯铝基体提高７１．５％，硬度提高１３４％，而延伸率较纯铝稍有下降。更多还原

【Abstract】 Pure aluminum matrix Al 3Ti particle composite was made by a new in situ method involving reactions between Al and TiO 2 which was stirred into molten metal. The size of the reinforcement Al 3Ti particle which is homogeneous in the pure Al matrix is 2～3μm. The combination between Al 3Ti and Al matrix is very well. When the amount of TiO 2 is 30wt% and the reaction temperature is 920℃, the strength and hardness of the composite are higher than those of pure aluminum matrix by 71.5% and 134%, respectively. However, the ductility of the composite is slightly lower than that of aluminum matrix.更多还原