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对粉末冶金法制备的尺寸分别为3．5，10，20μm的Sicp增强Al-Cu基复合材料的拉伸断口及EDX成分分析表明，增强相尺寸大于10μm时，复合材料的破坏归因于SiCp解理形成的裂纹；增强相尺寸为3．5μm时，复合材料的破坏则归因为SiC-Al界面撕裂形成空洞和裂纹.拉伸试验表明，小尺寸SiCp增强的复合材料具有高的拉伸强度及延伸率.低强度复合材料由于基体强度降低，塑性增加，破坏过程主要表现在拉伸载荷下SiCp附近铝基体的空洞形核、长大和聚合.
The tensile fracture and EDX composition analysis of SiCp reinforced Al-Cu matrix composites prepared by powder metallurgy with size of 3.5, 10 and 20μm respectively showed that the failure of the composites was attributed to SiCp Cleavage of the formed cracks.When the reinforcement phase size is 3.5μm, the failure of the composites is attributed to the formation of voids and cracks in the SiC-Al interface.Tensile tests show that the composite with small size SiCp has high tensile strength Strength and elongation of low-strength composites due to matrix strength decreased, the plasticity increases, the main failure process under the tensile load of aluminum in the SiCp hole nucleation, growth and polymerization.