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采用粉末冶金方法制备了碳纳米管增强铜基复合材料(CNT/Cu),碳纳米管的体积分数分别为0%、5%、10%、12%和15%,在HST100载流摩擦磨损试验机上考察了有无电流2种状态下复合材料的摩擦磨损性能.结果表明:有电流条件下的摩擦系数和磨损率均比无电流条件下大,且表面磨损严重;载流条件下,随碳纳米管体积分数的增加,复合材料的摩擦系数和磨损率均降低,主导磨损形式由电气磨损逐渐过渡到黏着磨损.碳纳米管在复合材料中起到增强、减摩的作用.
Carbon nanotubes reinforced Cu matrix composites (CNTs / Cu) were prepared by powder metallurgy. The volume fraction of carbon nanotubes was 0%, 5%, 10%, 12% and 15% respectively. The friction and wear properties of the composites under current and current conditions were investigated.The results show that the friction coefficient and the wear rate under the current condition are higher than those under no current condition and the surface wear is serious.Under the current carrying condition, The increase of the volume fraction of nanotubes, the friction coefficient and the wear rate of the composites decrease, and the dominant wear form gradually transition from electrical wear to adhesive wear. Carbon nanotubes play the role of enhancing and reducing friction in the composite material.