论文部分内容阅读
采用复合电沉积法在铝合金表面上制备了镍-磷-碳纳米管(Ni-P-CNTs)复合镀层,并用X射线衍射(XRD)和扫描电镜(SEM)对其进行了表征,分析了电流密度和镀液中碳纳米管的质量浓度对复合镀层形貌及其摩擦磨损性能的影响.当电流密度为3.0 A/dm2时可以得到表面光亮、平整的复合镀层,复合镀层中碳纳米管体积分数随着镀液中碳纳米管质量浓度的增加而增加.Ni-P-CNTs复合镀层比Ni-P镀层具有更高的硬度、耐磨性能和更低的摩擦系数.随着复合镀层中碳纳米管体积分数的增加,复合镀层的磨损量和摩擦系数逐渐降低.复合镀层摩擦性能的改善是由于碳纳米管具有优异的力学性能和良好的自润滑性能.
Nickel-phosphorus-carbon nanotubes (Ni-P-CNTs) composite coatings were prepared on the surface of aluminum alloy by composite electrodeposition method. The composite coatings were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) The current density and the concentration of carbon nanotubes in the bath on the morphology and friction and wear properties of the composite coating.When the current density of 3.0 A / dm2, the surface can be bright, smooth composite coating, composite coating carbon nanotubes The volume fraction increases with the mass concentration of carbon nanotubes in the bath.Ni-P-CNTs composite coating has higher hardness, wear resistance and lower friction coefficient than Ni-P coating.With the increase of The volume fraction of carbon nanotubes increases, the wear amount and friction coefficient of the composite coating decrease gradually.The improvement of the friction performance of the composite coating is due to the excellent mechanical properties and good self-lubricating properties of the carbon nanotubes.