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采用一种新型的金属基复合材料制备工艺──熔体反应法．制备了二种内生颗粒增强Al基复合材料:一种为Al／TiAl3，另一种为分别采用混合盐体系和氧化物体系制备的Al-4.5Cu／TiB2Al／TiAl3复合材料中的TiAl3随熔体反应时间增加和反应温度的升高，由细小的颗粒（＜3μm）长成粗大的短棒状组织，混合盐体系制备的Al-4．5Cu／TiB2复合材料中的TiB2颗粒细小（＜2μm），但被熔盐包覆，削弱了其对基体的增强效果．氧化物体系制备的Al-4．5Cu／TiB2复合材料中的TiB2颗粒的平均尺寸为0．93μm，TiB2颗粒表面洁净，与基体结合好，该复合材料的力学性能优越，σb＝416.7MPa，σ0.2＝316．9MPa，δ＝3．3％，HV153。
A new type of metal matrix composite material preparation process ─ ─ melt reaction. Two kinds of endogenous particle reinforced Al matrix composites were prepared: one was Al / TiAl3 and the other was TiAl3 in Al-4.5Cu / TiB2Al / TiAl3 composites prepared by mixed salt system and oxide system respectively. TiB2 particles in the Al-4.5Cu / TiB2 composites prepared by the mixed salt system are small (<2μm) and the size of TiB2 particles is small (<3μm) , But was coated with molten salt, weakened its enhancement of the substrate. The average size of TiB2 particles in the Al-4.5Cu / TiB2 composites prepared by the oxide system is 0.93μm, the surface of TiB2 particles is clean and well bonded with the matrix, the mechanical properties of the composites are excellent, σb = 416.7MPa, σ0 .2 = 316.9 MPa, δ = 3.3%, HV153.