通过原位合成石墨烯结合粉末烧结法制备了石墨烯增强铜复合材料,然后在空气环境中研究石墨烯增强铜复合材料的摩擦性能.实验选用直径为6 m m的WC磨球与复合材料组成摩擦副,利用摩擦磨损试验机对材料进行摩擦磨损测试.采用SEM、EBSD、EDS和三维轮廓形貌仪等相关检测设备对复合材料的微观组织结构以及磨损的表面形貌结构进行分析表征.结果表明,相比于纯铜材料,石墨烯增强铜复合材料具有更低的摩擦系数,这主要归功于复合材料较高的硬度以及石墨烯的自润滑效应.最后结合复合材料的磨损形貌给出了相关的磨损机制.
Abstract
Graphene reinforced Cu composite was prepared by in situ synthesis of graphene on Cu powders and SPS technology.The tribological properties of pure Cu and composite were studied in air environ-ment.In the experiment,WC ball with 6 mm in diameter and composite were used to form a friction pair,and friction testing was used to test the friction coefficient of material.The microstructure,wear surface morphology and structure of the composite were analyzed by SEM,EBSD,EDS and 3D profile analyzer.Compared with pure Cu,graphene reinforced Cu composite has a lower friction coefficient, which is mainly attributed to the higher hardness of the composite materials and the self-lubricating effect of graphene.Finally,this work provides the relevant wear mechanism of the composite.
维普
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