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通过粉末冶金技术制备多壁碳纳米管(MWCNTs)增强的Cu-Sn合金纳米复合材料。CNTs的质量分数从0以0.5%的增量逐步增加到2%,研究纳米复合材料的密度、硬度、电导率和摩擦磨损行为。结果表明:纳米复合材料的密度随CNTs含量的增加而降低;添加CNTs能显著提高纳米复合材料的硬度;相对于没有增强的合金,纳米复合材料具有低的摩擦因数和更好的耐磨性。当外加负载为5 N时,与Cu-Sn合金相比,含量为2%的多壁碳纳米管增强的Cu-Sn合金纳米复合材料的摩擦因数和磨损量分别降低了72%和68%。报道了复合材料磨损表面的磨损机理。此外,合金的电导率随CNTs含量的增加而降低。
Multi-walled carbon nanotubes (MWCNTs) reinforced Cu-Sn alloy nanocomposites were prepared by powder metallurgy. The mass fraction of CNTs was gradually increased from 0 to 2% from 0% to study the density, hardness, conductivity and friction and wear behavior of nanocomposites. The results show that the density of nanocomposites decreases with the increase of CNTs content. The addition of CNTs can significantly increase the hardness of the nanocomposites. The nanocomposites have lower friction coefficient and better wear resistance than the non-reinforced alloys. When the applied load is 5 N, the friction coefficient and the wear amount of Cu-Sn alloy nanocomposites reinforced by multi-walled carbon nanotubes reinforced by 2% are reduced by 72% and 68% respectively compared with that of Cu-Sn alloy. The wear mechanism of composite wear surface is reported. In addition, the conductivity of the alloy decreases with increasing CNTs content.