中文摘要：

采用粉末冶金法制备了石墨/碳纳米管（CNTs）增强铝基复合材料,研究了石墨和碳纳米管对复合材料摩擦磨损性能及硬度的影响,并利用扫描电子显微镜观察了复合材料的显微组织、磨损表面形貌.结果表明：仅添加石墨的复合材料摩擦系数明显降低,而磨损率、硬度有少量降低;但是将石墨和碳纳米管混杂加入到复合材料中后,材料的摩擦系数明显降低,磨损率急剧升高,且材料的硬度随碳纳米管含量增加而逐渐下降.仅添加石墨的复合材料磨损形式主要是磨粒磨损和犁沟磨损,而添加石墨和碳纳米管的复合材料主要是剥层磨损.

英文摘要：

Graphite and carbon nanotubes reinforced aluminum matrix composites were fabricated by power metallurgy method and friction and wear performance of the hybrid composites were investigated.The microstructure and worn surface were observed by scanning electron microscope（SEM）.Experimental results show that the friction coefficient of the composites decreased after adding graphite,and the wear rate and hardness decreased as well.However,the friction coefficient decreased obviously after adding graphite and carbon nanotubes together,while the wear rate increased significantly.With increasing carbon nanotubes content,the hardness of composites reduced continuously.It was concluded that the wear mechanisms of composites containing graphite are ploughing groove and abrasive wear,while the wear mechanism of composites containing graphite and carbon nanotubes is delaminate wear.