Ni-PTFE复合镀层的制备及其摩擦学性能研究

Study on the Preparation and Tribological Properties of Ni-PTFE Composite Coating

采用复合共沉积方法,研制了基于紫铜基体的Ni-PTFE(镍-聚四氟乙烯)复合镀层。在镀液中PTFE的分散性研究的基础上,考虑PTFE悬浮量对复合镀层的影响,开展了对单一Ni镀层以及Ni-PTFE复合镀层摩擦学性能研究。研究结果表明:相对Ni镀层而言,Ni-PTFE复合镀层具有很好的减摩效果。Ni镀层的摩擦系数为0.7,Ni-PTFE复合镀层的摩擦系数为0.22,仅为镍镀层的32%左右;此外,Ni-PTFE复合镀层的磨损小,耐磨性能优异。其中,添加(20 mL/L)PTFE的复合镀层综合性能最优。

A composite co-deposition method was used to prepare a Ni-PTFE composite coating on the copper substrate.Based on the research on the dispersion of PTFE in the plating solution,the influence of PTFE suspension on the composite coating is considered.The tribological properties of single Ni coating and Ni-PTFE composite coating are studied.The results of the study are that the Ni-PTFE com‐posite coating on the surface has a good anti-friction effect compared with the Ni coating.The coeffi‐cient of friction of the Ni coating is 0.7,and the coefficient of friction of the Ni/PTFE composite coat‐ing is 0.22,which is only about 32%of that of the pure nickel coating.At the same time,the wear is lighter,showing excellent wear resistance,the composite coating with(20 mL/L)PTFE has the best overall performance.