石墨/CNTs增强铝基混杂复合材料的微观组织与摩擦磨损性能  

Microstructure,Friction and Wear Performance of Graphite/Carbon Nanotubes Reinforced Aluminium Matrix Composites

作　　者：吴尚敏[1] 李克[1] 王飞[1] 廖健南[1] 詹美清[1] 

机构地区：[1]南昌大学机电工程学院,南昌330031

出　　处：《材料导报》2014年第2期76-78,共3页Materials Reports

基　　金：国家自然科学基金(51264032);教育部留学回国人员科研启动基金

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。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.

关 键 词：铝基混杂复合材料 摩擦磨损 石墨 碳纳米管 

分 类 号：TB33[一般工业技术—材料科学与工程]