氧化石墨烯负载氧化铈对铜基复合材料性能的影响

The Effect of Graphene Oxide Supported Cerium Oxide on the Properties of Copper Matrix Composites

为了提高铜基复合材料的综合性能,本试验设计了三种高强度、高导电性的电触头材料。将氧化石墨烯(GO)和CeO_(2)纳米粒子优良的电学和力学性能引入到电接触性能稳定的铜基复合材料中,采用放电等离子烧结(SPS)的方法制备了Cu/30Cr、0.5GO/CeO_(2)-Cu/30Cr、1.0GO/CeO_(2)-Cu/30Cr三种电触头材料,研究氧化石墨烯负载氧化铈对铜基复合材料性能的影响。研究结果显示在烧结过程中,GO被还原为rGO,原位形成的Cr_(3)C_(2)和CeO_(2)纳米颗粒的位错钉扎效应对材料起到了强化作用,氧化石墨烯负载氧化铈的加入提高了复合材料的综合性能。

In order to improve the comprehensive performance of copper matrix composites,three kinds of electrical contact materials with high strength and high conductivity were designed in this experiment,the excellent electrical and mechanical properties of graphene oxide(GO)and CeO_(2)nanoparticles were introduced into the copper matrix composites with stable electrical contact performance.Three kinds of electrical contact materials,Cu/30Cr,0.5GO/CeO_(2)-Cu/30Cr and 1.0GO/CeO_(2)-Cu/30Cr,were prepared by spark plasma sintering(SPS).The effect of graphene oxide supported cerium oxide on the properties of copper matrix composites was studied.The results show that during the sintering process,GO is reduced to RGO,and the dislocation pinning effect of in-situ formed Cr_(3)C_(2)and CeO_(2)nanoparticles strengthens the material.The addition of graphene oxide-loaded cerium oxide improves the overall performance of the composite.