纳米颗粒增强铜基喷撒摩擦片的摩擦学性能研究

Tribological properties of nano-particles reinforced copper-based spray friction plate

通过调整成分配比、添加纳米材料、采用球磨工艺及改变石墨形态研究了纳米材料、球磨处理及石墨形态对铜基喷撒摩擦材料摩擦学性能的影响规律。结果表明:添加Ni/n-SiO2与球磨Cu/天然石墨、球磨Cu/nSiO2与球磨Cu/天然石墨可提高铜基喷撒摩擦片的综合性能;球磨Cu/纳米石墨+球磨Cu/天然石墨可提高铜基喷撒摩擦材料的耐磨性和耐热性能,但会显著降低摩擦材料的摩擦因数;采用球磨法制备Cu与石墨的复合颗粒,可提高铜基喷撒摩擦材料基体中的石墨含量,从而显著提高摩擦材料的耐热性能。

The effects of nano-materials,ball milling and graphite morphology on tribological properties of copper-based spray friction materials were studied by adjusting the composition ratio,adding nano-materials,adopting ball milling process and changing graphite morphology.The results show that adding Ni/n-SiO2 and ball-milled Cu/natural graphite,ball-milled Cu/n-SiO2 and ball-milled Cu/natural graphite can improve the comprehensive properties of copper-based spray friction plates.Ball-milled Cu/nano graphite+ball milled Cu/natural graphite can improve the wear resistance and heat resistance of copper-based spray friction materials,but can significantly reduce the friction coefficient of friction materials.The preparation of Cu-graphite composite particles by ball milling method can increase the graphite content in the matrix of copper-based spray friction materials,thus significantly improve the heat resistance of friction materials.