▎ 摘　　要

The hybrid of carbon nanotube (CNT) and reduced graphene oxide (RGO) reinforced ZK61 composite was fabricated by a hot extrusion process. Compared with the raw ZK61 alloy and single-reinforced composites, the hybrid-reinforced by RGO + CNT complex exhibited significant enhancements both in mechanical and thermal performance. By adjusting the proportion of RGO and CNT in ZK61 alloy, the obtained optimum ZK61/(0.06 wt% RGO + 0.54 wt% CNT) composite exhibited increase of 25.4% in yield strength, 26.5% in ultimate tensile strength, 104% in failure strain and 30.4% in thermal conductivity, respectively, in comparison with ZK61 alloy. The superior properties of the nano-hybrid composite are attributed to the synergetic effects of RGO and CNT, leading to a uniform dispersion and integrated structure as well as the enhanced interfacial bonding with matrix. The strengthening ability of RGO and CNT was calculated to quantify their individual contribution to the improvement in mechanical and thermal properties of the ZK61 matrix composite. The RGO + CNT hybrids provide a promising way to develop Mg matrix composites with impressive performances.