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为改善金属Zn的摩擦磨损性能,采用热压法制备Cr2Al C陶瓷颗粒增强Zn基复合材料,并研究了Cr2Al C颗粒含量对复合材料的组织形貌、硬度、密度及摩擦磨损性能的影响。结果表明,复合材料的硬度随着Cr2Al C含量的适量增加而明显升高。当Cr2Al C的质量分数达到20%时,复合材料的硬度是纯锌的1.52倍。摩擦磨损实验表明,Cr2Al C颗粒的引入,可显著改善复合材料的摩擦磨损性能,摩擦系数由纯Zn的0.75降到Zn-20wt.%Cr2Al C的0.65,Zn-30wt.%Cr2Al C的磨损率相比纯Zn下降了80.54%。分析磨损表面形貌,得出其磨损类型为磨粒磨损和剥层磨损。
In order to improve the friction and wear properties of Zn, the Cr2Al C ceramic particles reinforced Zn matrix composites were prepared by hot pressing, and the effect of Cr2Al C content on the microstructure, hardness, density and friction and wear properties of the composite was investigated. The results show that the hardness of composites increases obviously with the increase of Cr2AlC content. When the mass fraction of Cr2Al C reaches 20%, the hardness of the composite is 1.52 times that of pure zinc. Friction and wear experiments show that the introduction of Cr2Al C particles can significantly improve the friction and wear properties of the composites. The friction coefficient decreases from 0.75 for pure Zn to 0.65 for Zn-20wt.% Cr2Al C, and the wear rate of Zn-30wt.% Cr2Al C Compared to pure Zn decreased by 80.54%. The wear surface morphology was analyzed to find that the wear types were abrasive wear and peeling wear.