石墨烯增强铝基复合材料的微观结构及力学性能研究

Study on Microstructure and Mechanical Properties of Graphene Reinforced Aluminum Matrix Composite

采用无水乙醇中超声波震荡和高能球磨实现石墨烯与铝粉的均匀混合,然后采用冷压和真空烧结制备了石墨烯增强铝基复合材料。研究了该复合材料的微观结构及力学性能研究。结果表明:所制备的复合材料基体致密,石墨烯结构完整,以片状物形式均匀的分布在基体内,石墨烯与铝基体界面结合良好。当石墨烯含量为0.6%(wt%)时,复合材料抗弯强度最好,达到114 MPa,比纯铝增加了24%;当石墨烯含量为0.4%时,复合材料的硬度最好,达44 HV,比纯铝增加了22%

The uniform mixing of graphite and aluminum powder was realized by ultrasonic vibration in anhydrous ethanol and high energy ball milling. The graphene reinforced aluminum matrix composite was prepared by cold pressing and vacuum sintering. The microstructure and mechanical properties of the composite were researched. The results show that the matrix of the prepared composite is dense, and the graphene structure is complete,which is uniformly distributed with flake form in matrix. The bonding of the interface of graphene and aluminum matrix is good. When the graphene content is 0.6wt%,the bending strength of the composite is the best,which can reach 114 MPa, and is increased by 24% compared with pure aluminum. When the content of graphene is 0.4%, the hardness of the composite is the best, which can reach 44 HV, and is increased by 22% compared with pure aluminum.