| Citation: | LI Zhi, ZHAO Wenyue, MIAO Naihuaet al. Preparation and tribological properties of Zn-Cr2AlC composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(4): 874-878. doi: 10.13700/j.bh.1001-5965.2017.0298(in Chinese)
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In order to improve the friction and wear properties of Zn, Cr2AlC ceramic particle reinforced Zn matrix composites were prepared by hot pressing method. The effects of Cr2AlC content on the metallographic structure, Vickers-hardness, relative density and tribological properties of the Zn-based composites were investigated. The results show that the hardness of the composites is improved obviously with the proper increase of Cr2AlC content. When the mass fraction of Cr2AlC reaches 20%, the hardness of the composite is 1.52 times higher than that of pure Zn. The introduced Cr2AlC particles can significantly improve the tribological properties of the composites. The friction coefficient decreases from 0.75 in pure Zn to 0.65 in Zn-20%Cr2AlC, and the wear rate of Zn-30%Cr2AlC is reduced by 80.54% compared to pure Zn. Analysis on the worn surface morphology indicates that the wear mechanism is abrasive wear and delamination wear.
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