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通过对采用半固态搅拌液态模锻工艺制备的ＳｉＣｐ／Ａｌ 合金基复合材料室温拉伸性能的研究， 分析了这种复合材料屈服强度和极限强度提高的原因， 对颗粒增强复合材料的强化机理进行了探讨； 同时， 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的增加， 脆性断裂特征变得更为显著。
Through the research on the tensile properties of SiCp / Al alloy matrix composites prepared by semi-solid stirred-liquid die forging process at room temperature, the reasons for the increase of yield strength and ultimate strength of the composites were analyzed. The strengthening mechanism of the particle reinforced composites At the same time, the tensile fracture of the material was observed by scanning electron microscope. It was found that although the fracture of the composite and the non-reinforced matrix alloy belong to the mixed mode of plastic fracture and brittle fracture, The increase in the volume fraction in the material, the brittle fracture characteristics become more pronounced.