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研究了多壁碳纳米管和碳化硅包覆铜增强铜基混合纳米复合材料的显微组织和摩擦性能。碳纳米管含量为1%~4%,碳化硅含量固定在4%。铜杂化纳米复合材料的合成过程包含球磨、冷压、烧结,随后热压。对混合纳米复合材料进行了密度、晶粒尺寸和硬度测试。在不同载荷条件下,在销-钢盘摩擦仪上采用干滑动磨损评估纳米复合材料的摩擦性能。结果表明,与纯铜相比,混合纳米复合材料的晶粒尺寸明显减小,4%碳纳米管增强杂化纳米复合材料的显微硬度提高了80%。混合纳米复合材料中碳纳米管含量的增加导致材料的摩擦因数和磨损率降低。
The microstructure and tribological properties of multi-walled carbon nanotubes and silicon carbide-coated copper reinforced copper-based hybrid nanocomposites were investigated. Carbon nanotube content of 1% to 4%, silicon carbide content fixed at 4%. Copper hybrid nanocomposite synthesis process includes ball milling, cold pressing, sintering, followed by hot pressing. The hybrid nanocomposites were tested for density, grain size and hardness. The tribological properties of nanocomposites were evaluated by dry sliding wear on a pin-steel disc friction tester under different load conditions. The results show that compared with pure copper, the grain size of the hybrid nanocomposites is obviously reduced, and the microhardness of the hybrid nanocomposite reinforced by 4% carbon nanotubes is increased by 80%. The increase of the content of carbon nanotubes in the hybrid nanocomposites leads to the decrease of the friction coefficient and the wear rate of the materials.