The influences of hybrid particles SiC and Al₃Ti on the micromorphology, density, porosity, hardness as well as wear properties for the hybrid 7075 aluminum composites fabricated via stir casting method were examined. In the case of the fixed addition of Ti to the hybrid 7075 material, the results show that the particle size of in-situ formed alloy Al₃Ti decreases gradually with the increase of the SiC addition. The density of composites first increases and then decreases with increasing the SiC particle content and the porosity increases due to a certain amount of gas in the small and complex channels within the aggregates. The hardness increases with adding the SiC. And (SiC-Al₃Ti)/7075 hybrid composites exhibits less wear rate than 7075 alloy and Al₃Ti/7075 composites. Compared with the alloy substrate, the wear rate of 5 wt% SiC (SiC-Al₃Ti)/7075 hybrid composites is decreased by 17 % at 15 N and 200 m sliding distance.

中文翻译：

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SiC对（SiC-Al3Ti）/ 7075铝复合材料的形貌和磨损性能的影响

考察了SiC和Al ₃ Ti杂化颗粒对搅拌铸造法制备的7075杂化铝复合材料的微观形貌，密度，孔隙率，硬度以及耐磨性的影响。在向混合7075材料中固定添加Ti的情况下，结果表明，随着SiC添加量的增加，原位形成的合金Al ₃ Ti的粒径逐渐减小。随着SiC颗粒含量的增加，复合材料的密度首先增加，然后降低，并且由于聚集体中小的复杂通道中的一定量的气体，孔隙率增加。硬度随着SiC的添加而增加。并且（SiC-Al ₃ Ti）/ 7075杂化复合材料的磨损率低于7075合金和Al₃ Ti / 7075复合材料。与合金基底相比，在15 N和200 m的滑动距离下，5 wt％SiC（SiC-Al ₃ Ti）/ 7075杂化复合材料的磨损率降低了17％。