碳纳米管/铝基复合材料的制备及摩擦性能研究

采用无压渗透法制备了碳纳米管增强铝基复合材料，并对其摩擦性能进行了研究。利用扫描电镜（SEM）观察了复合材料断面的形貌，通过复合材料硬度测量和摩擦磨损实验，研究了不同碳纳米管体积分数对复合材料的硬度及摩擦磨损性能的影响。实验结果表明，碳纳米管均匀地分散于复合材料中，且与铝基体结合良好；碳纳米管的加入增大了复合材料的硬度，且其摩擦系数和磨损率随着碳纳米管体积分数的增大而减小。由于碳纳米管本身具有自润滑和增强作用，碳纳米管的加入极大地改善了铝合金材料的摩擦性能。

Fabrication and tribological properties of carbon nanotubes-aluminum composites

Aluminium composites reinforced with carbon nanotubes(CNTs) were fabricated by pressureless infiltration process and the tribological properties of the composites were investigated.The fracture surface of the composite was observed by scanning electron microscope(SEM).The variation of the composites hardness with volume fraction of CNTs was tested,and the friction coefficient and wear rate of the composites were measured using a pin-on-disk wear tester.Experimental results indicate that CNTs are well dispersed and embedded in the aluminium matrix;and the friction coefficient and wear rate of the composites decrease with increasing volume fraction of CNTs.The favorable effects of CNTs on wear resistance are attributed to their excellent self-lubricating property,being well dispersed in the composites and the efficiency of the reinforcement of CNTs.