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以镀铬碳纤维和铜粉为原料,采用粉末冶金方法制备碳纤维增强铜基体复合材料,用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、聚焦离子束(FIB)、电子天平、数字金属电导率测量仪以及硬度计对碳纤维及复合材料进行显微组织及力学性能的研究,并探讨碳纤维体积分数对复合材料性能的影响。结果表明:碳纤维在铜基体上分布均匀,基体组织致密,随碳纤维体积分数增加,复合材料密度逐渐降低,且复压复烧后材料密度提高,复合材料的密度在碳纤维体积分数为1%时达到最大值(8.640 9 g/cm3);复合材料的硬度值先增加后减小,复压复烧后,碳纤维体积分数为5%时硬度达到最大值(50.6HV);随碳纤维体积分数增加至15%,导电率逐渐减小至75.8%IACS。
The chrome-plated carbon fiber and copper powder were used as raw materials to prepare carbon fiber reinforced copper matrix composites by powder metallurgy method. The properties of the carbon fiber reinforced copper matrix composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), focused ion beam (FIB) Rate measuring instrument and hardness tester were used to study the microstructure and mechanical properties of carbon fiber and its composites. The effects of carbon fiber volume fraction on the properties of composites were also discussed. The results show that the carbon fiber is uniformly distributed on the copper matrix and the matrix is dense. With the increase of the volume fraction of carbon fiber, the density of the composite decreases gradually and the density of the composite increases after the composite is burned. The density of the composite reaches at the volume fraction of carbon fiber of 1% (8.640 9 g / cm3). The hardness of the composites first increased and then decreased, and the maximum hardness (50.6HV) was obtained when the carbon fiber volume fraction was 5% %, The conductivity is gradually reduced to 75.8% IACS.