热压烧结制备碳化钛增强石墨烯/铜复合材料的力学及其摩擦性能探究

Study on Mechanics and Friction Properties of Titanium Carbide Reinforced Graphene/copper Composites Prepared by Hot-press Sintering

为了提高石墨烯在铜基体中的润湿性,以铜为基体、石墨烯为增强体,添加碳化钛,探索TiC对石墨烯/铜的力学性能及其磨损界面的影响。首先,通过真空热压烧结(950℃,20MPa)制备不同TiC含量(0、0.24%、0.50%)的Cu-TiC-graphene复合材料,然后进行硬度和拉伸强度等力学性能检测,并通过往复式磨损研究了其摩擦磨损性能。研究结果表明:TiC的加入,可以提高石墨烯-铜的硬度(74.2 GPa)、抗拉强度(47.1 MPa),降低摩擦系数(<0.2),减少磨损量。

In order to improve the wetting ability of graphene in the copper matrix,taken copper as the base and graphene as the enhancement body,add titanium carbon,and the effects of TiC on the mechanical properties of graphene/copper and its wear interface were explored.First,the Cu-TiC-graphene composite of different TiC content(0,0.24%,0.50%)was prepared by vacuum thermal pressure sintering(950℃,20 MPa).Then the mechanical properties such as hardness and tensile strength and the friction and wear properties were studied by reciprocating wear.The results show that the addition of TiC can improve the hardness(74.2 GPa),tensile strength(47.1 MPa),reduce the coefficient of friction(<0.2)of graphene-copper and reduce the amount of wear.