氧化石墨烯/铜基复合材料的微观结构及力学性能

Microstructure and Mechanical Properties of Graphene Oxide/Copper Composites

采用球磨和真空热压烧结方法成功制备氧化石墨烯/铜复合材料。利用OM,SEM,XRD,显微硬度计和电子万能试验机等分析球磨后的复合粉形貌,研究氧化石墨烯添加量对复合微观结构及力学性能的影响。结果表明:制备的氧化石墨烯/铜基复合材料组织致密,氧化石墨烯以片状形态较均匀地分布在铜基体中,并与铜基体形成良好的结合界面。氧化石墨烯质量分数为0.5%时,复合材料的综合力学性能较好,显微硬度和室温压缩强度分别为63HV和276MPa,相对于纯铜基体分别提高了8.6%和28%。其强化机理为剪切应力转移强化、位错强化和细晶强化。

Graphene oxide/copper（GO/Cu）composites were successfully synthesized through the ball milling and vacuum hot press sintering process.The morphologies of the mixture powders,and the microstructure and mechanical properties of GO/Cu composites were investigated by OM,SEM,XRD,hardness tester and electronic universal testing machine,respectively.The results show that the GO/Cu composites are compact.Graphene oxide with flake morphology is uniformly dispersed and well consolidated with copper matrix.When the mass fraction of graphene oxide is 0.5%,the microhardness and compress strength at RT reach up to 63 HV and 276 MPa,increased by 8.6% and 28%,respectively.The strengthening mechanism is load transfer effect,dislocation strengthening and fine crystal reinforcing.