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在铝基中,加入纳米SiC和CuO颗粒,通过CuO与铝基反应生成Al2O3强化相,获得由游离相(SiC)和原位生成相(Al2O3)共同强化的混杂复合材料。结果表明,生成的混杂复合材料硬度、强度以及耐磨性都较原材料有明显提高。随增强相含量的增加,生成的复合材料摩擦系数明显提高,但当增强相含量达到一定程度时,又会呈一定程度下降。两种强化相对硬度和摩擦系数提升的效率明显不同,游离SiC要明显强于原位生成相Al2O3。
In the aluminum matrix, nano-SiC and CuO particles were added into the aluminum matrix to form a reinforced phase of Al 2 O 3 by reacting CuO with aluminum matrix to obtain a hybrid composite reinforced by a combination of free phase (SiC) and in-situ phase (Al 2 O 3). The results show that the hardness, strength and wear resistance of the hybrid composites are obviously higher than those of the original materials. With the increase of the content of the reinforcing phase, the friction coefficient of the composite increases obviously, but when the content of the reinforcing phase reaches a certain level, it will decrease to a certain extent. The efficiency of the two kinds of strengthening relative hardness and friction coefficient is obviously different, the free SiC should be obviously stronger than the in-situ phase Al2O3.