含镀铜石墨颗粒铜基复合材料研究

采用化学镀铜工艺在石墨颗粒表面镀上一层金属铜,通过粉末冶金方法制备了铜/石墨复合材料,研究了石墨颗粒表面铜镀层在不同处理温度下的球化问题和改善复合材料界面结合的作用效果.结果表明,石墨颗粒表面铜镀层有利于改善铜基石墨复合材料的界面结合,使复合材料力学性能提高;处理温度较高时,表面铜镀层有熔融球化的趋势,当复合材料烧结温度超过石墨镀铜层的完全球化温度时,镀铜石墨粉改善界面结合的效果逐渐降低,直至消失.

Study on copper matrix composite containing copper-coated graphite particles

Graphite particles were coated with a layer of copper by electroless plating, copper/graphite composite materials were made by powder metallurgy method. The spheroidization of the copper coating at different treatment temperatures and its influence on the interface binding of the composite were investigated. The results show that the copper coating on the graphite particles is favorable to improve the interface binding of graphite and copper matrix, which results in the improvement of mechanical properties of the composite. When treated at high temperatures, the copper coating tends to melt and spheroidize. When the sintering temperature of the composite is higher than the spheroidization temperature of the copper coating, the effect of the copper-coating on graphite particles in improving the interface binding of the composite becomes weaker and even disappears.