采用真空热压法在520~600℃温度范围内制备30%(体积分数)SiCp/2024Al 复合材料，利用扫描电镜(SEM)、X射线衍射( XRD)和万能材料试验机研究热压温度对该复合材料的微观组织、相组成和力学性能的影响。结果表明，随热压温度升高，30%SiCp/2024Al 复合材料的孔洞减少，致密度增大，界面结合增强。热压温度为580℃时复合材料的抗拉强度最大，达到194 MPa。热压温度升高到600℃时，复合材料的抗拉强度下降到176 MPa，SiC颗粒断裂增多和基体强度下降是复合材料抗拉强度减小的重要原因。%2024 aluminum composites reinforced with 30%(volume fraction) SiC particulates were prepared by vacuum hot pressing method, in the temperature range of 520~600℃. The effect of vacuum hot pressing sintering temperature on the properties of the microstructures, phase composition and mechanical properties was investigated using SEM, XRD and mechanical testing machine. The results indicate that the porosity decreases, density and interfacial bonding strength increase with increasing hot pressing temperature. The composite fabricated at 580 ℃ exhibites the optimum tensile strength (194 MPa). The tensile strength of the 2024 aluminum composite reduces to 176 MPa when the hot pressing temperature is 600 ℃. Both SiC particle fracture increase and matrix strength decrease are the main reasons for the decrease of composite tensile strength.
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