中文摘要：

采用放电等离子体烧结（spark plasma sintering,SPS）技术制备了含质量分数为0%、0.5%、1.0%、2.0%和5.0%的纳米SiC颗粒（SiCp,平均粒径为40 nm）增强铝镁复合材料,通过扫描电镜（scanning electron microscope,SEM）观察铝镁复合材料微观组织形貌,并对复合材料进行了力学性能测试,研究了不同质量分数纳米SiCp对复合材料相对密度和力学性能的影响规律,确定了制备复合材料最佳SiCp添加量。研究表明：随着纳米SiCp质量分数的增加,复合材料的硬度逐渐增加,抗拉强度呈现先增加后降低的变化趋势,质量分数为1.0%的SiCp增强铝镁复合材料的性能最好,相对密度和抗拉强度分别达到了98.36%和301.5 MPa。

英文摘要：

The Al-Mg composites reinforced by nano-SiC particles （SiCp, average particle size 40 nm） in different particle contents of 0%, 0.5%, 1.0%, 2.0%, and 5.0% by mass were prepared by spark plasma sintering （SPS） in this paper. The microstructures of nano-SiCp reinforced Al-Mg composites （SiCp/Al-Mg） were observed by scanning electron microscope （SEM）, the mechanical properties of the composites were tested, and the optimum SiCp content was defined. The results show that, the composite hardness increases with the increase of the nano-SiCp content, the tensile strength increases first and then decreases. The SiCp/Al-Mg composites with 1.0% nano-SiCp show the best performance, the relative density and tensile strength reaches 98.36% and 301.5 MPa, respectively.