【摘要】 以AZ91D作为基体，Ti颗粒和利用电爆沉积法在Ti颗粒表面包覆Al的Al-Ti颗粒作为增强颗粒，使用搅拌铸造工艺分别制备了Ti_p/AZ91D和（Al-Ti）_p/AZ91D两种复合材料。使用扫描电子显微镜（SEM）对复合材料中Ti颗粒分布的均匀性进行了观察，并进一步的对增强体与基体间的界面进行了分析。通过拉伸试验，考察了复合材料的屈服强度、抗拉强度及伸长率等力学性能指标，并对断口进行了分析。由于表面包覆后的Al-Ti颗粒能够提供更好的界面结合，因此与Ti_p/AZ91D复合材料相比（Al-Ti）_p/AZ91D复合材料具有更高的力学性能。更多还原

【Abstract】 In this study, based on AZ91D, Ti particles and Al-Ti particles coated with Al on the surface of Ti particles by the electroexplosive deposition method were used as reinforced particles. Ti_p/AZ91Dand(Al-Ti)_p/AZ91D composites were produced by the stirring casting process, respectively. The uniformity of distribution of reinforced particles was observed by scanning electron microscopy(SEM), and the interface between the reinforced particles and the matrix were further analyzed. Besides, tensile tests were experimented on the composites, that the indexs of mechanical properties such as tensile strength, yield strength, and elongation of the composites were studied on and the fracture of the composites was analyzed. Since Al-Ti particles coated on the surface could significantly increase the thickness of the interfacial layer, and its special cloudlike interfacial layer made the pinning effect more obvious, compared with Ti_p/AZ91D composites,(Al-Ti)_p/AZ91D composites had higher mechanical properties.更多还原