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中文摘要：
采用注射成形方法制备了Cu／Al2O3复合材料，研究了铜的含量对复合材料性能的影响，结果表明：铜含最为10％时，复合材料具有最佳综合性能。通过扫描电镜观察了复合材料的断口形貌，分析了其断裂机制，表明Cu／Al2O3复合材料断裂时存在沿晶断裂、穿晶断裂以及铜颗粒的拔出三种方式，且三者比例依次降低。
英文摘要：
Cu/Al2O3 composites were prepared by injection molding, and effects of copper content on the properties were studied. The result shows that the Cu/Al2O3 composites get the best comprehensive performance with copper content at 10%. The fracture morphology of Cu/Al2O3 composites was observed by scanning electron microscope, and fracture mode was studied. It is concluded that when Cu/Al2O3 composites break, three modes such as intergranular fracture, transgranular fracture and pull out of copper particles exist, and three kinds of fracture probabilities decrease in turn.
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