石墨和铜的含量对银基复合材料组织和性能的影响

采用粉末冶金方法制备了银-石墨-铜-碳纤维复合材料，通过金相、XRD分析和物理性能测试等手段，对不同石墨和铜含量的银基复合材料的组织和性能进行了研究。结果表明：随着石墨含量的增加，硬度减小，电阻率升高；而铜对材料起强化作用的同时，随着其含量的增加，电阻率升高；石墨和铜的含量分别选择在4％～9％和5％～7％之间为宜。

Effects of Contents of Graphite and Copper on Microstructure and Properties of Silver Matrix Composites

Silver-graphite-copper-carbon fiber composites is prepared by powder metallurgy. The structure and physical property of the silver matrix composite with different graphite and copper content are studied through metallographic analysis, XRD and physical testing method. The result shows that with the graphite content increasing the hardness reduces and the electrical resistivity rises. The copper can create strengthening and cause a litter increasing of electrical resistivity with its content increasing. The best content of the graphite and the copper is 4% -9% and 5% -7% respectively.