石墨烯增强铜基复合材料的研究进展

石墨烯具有超高的比表面积和优异的力学性能, 是铜基复合材料理想的增强体。传统的粉末冶金工艺很难解决石墨烯在铜基体中的分散问题, 以及石墨烯与铜基体结合性差的难题。随着近些年研究者对石墨烯-铜界面问题深入的探索, 一些新的制备工艺不断出现。本文系统地介绍和对比了近几年石墨烯增强铜基复合材料的制备工艺, 概述了关于石墨烯/铜复合材料力学性能的研究进展, 总结了石墨烯增强铜基复合材料力学性能的机理, 并对未来石墨烯增强铜基复合材料的研究重点进行了展望。

Preparation and Mechanical Property of Graphene-reinforced Copper Matrix Composites

Graphene, which has two-dimensional carbon single atomic layer, attracts great attention due to its superb mechanical, electrical and thermal properties. In addition to its excellent mechanical properties, a large surface area (about 2600 m ²?g ^-1) makes it an ideal reinforcement for copper-based composites. However, graphene owns a low density (2.2 g?cm ^-3), while the density of copper is about 8.9 g?cm ^-3. The traditional powder metallurgy process is difficult to solve the problem of uniform dispersion of graphene in the copper matrix and the poor bonding strength between graphene and copper due to the huge density difference between copper and graphene. With the in-depth exploration in the issue of graphene/copper interface in recent years, some novel preparation processes and strengthening mechanisms were proposed and demonstrated. This review systematically introduces and compares the recently-developed preparation processes of graphene-reinforced copper composites, also summarizes the mechanism of mechanical enhancement in graphene-reinforced copper matrix composites.