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采用电镀工艺,使碳纤维表面形成铜镀层。利用机械合金化法得到铜石墨复合粉末,通过真空热压烧结技术制备碳纤维增强铜基复合材料。观察该复合材料的组织形貌。测定相组成,测量显微硬度与密度。结果表明,镀铜碳纤维的加入有利于石墨铜基复合材料的组织致密化,可将该复合材料的相对密度由74%提高到91%,显微硬度由31.0 HV提高至38.7 HV。当镀铜碳纤维质量分数为10%时,由于碳纤维的偏聚,其基体的显微硬度略有降低。
Electroplating process, the surface of the carbon fiber to form a copper coating. Copper-graphite composite powder was obtained by mechanical alloying method, and carbon fiber reinforced copper matrix composites were prepared by vacuum hot pressing sintering. The morphology of the composite was observed. Determination of phase composition, measurement of microhardness and density. The results show that the addition of copper-plated carbon fibers is beneficial to the densification of the graphite-based composites. The relative density of the composites can be increased from 74% to 91% and the microhardness increases from 31.0 HV to 38.7 HV. When the mass fraction of copper-plated carbon fibers is 10%, the microhardness of the matrix slightly decreases due to the segregation of carbon fibers.