CNTs增强石墨/铝复合材料的挤压态组织及摩擦磨损性能

As-extruded Microstructure and Wear-frictional Behavior of Carbon Nanotube Reinforced Aluminium/Graphite Composites

采用粉末冶金法和热挤压法制备了CNTs增强铝基复合材料,并用扫描电镜和光学显微镜观察了复合材料的显微组织和摩擦表面形貌,分析了CNTs含量对铝基复合材料的硬度、摩擦磨损等性能的影响。结果表明,随CNTs含量的增加,铝基复合材料致密度增大,摩擦因数和磨损率降低,硬度也降低;材料磨损形式主要为粘着磨损和磨粒磨损。

Carbon nanotube reinforced aluminum matrix composites were fabricated by powder metallurgy and hot extrusion method.The microstructure and wear surface of the composites prepared were observed by optical microscope and scanning electron microscope（SEM）,respectively.Wear behavior,hardness of the composites were investigated.Experimental results show that the hardness,frictional coefficient and ware rate of the composites are decreased,while the relative density is increased with the increase of CNTs content.The wear mechanism of the composites prepared are mainly characterized by adhesive wear and abrasive wear.