通过对ＳｉＣＰ／ＺＬ１０９ 复合材料制备工艺的研究，成功地制备了晶粒细小、组织致密、缺陷较少且ＳｉＣ颗粒分布均匀的ＳｉＣＰ／ＺＬ１０９ 复合材料。同时，测试了该材料的拉伸性能，对拉伸性能提高（或降低） 的原因进行了探讨；采用扫描电子显微镜对材料的拉伸断口进行了观察，发现复合材料及未增强基体合金的断裂虽均属于塑性断裂与脆性断裂的混合型模式，但随着ＳｉＣ颗粒在复合材料中的体积分数增加，脆性断裂特征更为显著。 The SiCP / ZL109 composites with small grain size, compact structure, less defects and uniform distribution of SiC particles were successfully prepared by studying the preparation process of SiCP / ZL109 composite. At the same time, the tensile properties of the material were tested, and the reasons for the increase (or decrease) of the tensile properties were discussed. The tensile fracture of the material was observed by scanning electron microscopy. The fracture of the composites and the non-reinforced matrix alloy Although both belong to the mixed mode of plastic fracture and brittle fracture, the brittle fracture characteristics are more obvious with the increase of the volume fraction of SiC particles in the composite.