喷射电沉积纳米Ni/Co多层镀层及其组织性能

目前,纳米金属多层膜的研究体系和应用范围有待扩展,镀层成形机理、强化机理等方面有待深入研究。利用喷射电沉积技术制备了不同调制周期(λ)的Ni/Co纳米多层镀层,并对镀层的表面形貌与组织、显微硬度、耐磨损性能进行了测试与分析。结果表明:多层镀层各层之间有明显界限,镀层致密均匀,与低碳钢结合牢固;随着λ的减小,Ni/Co多层镀层表面越来越致密,镀层越来越平整;Ni/Co多层镀层结构的硬度和耐磨性明显优于纯Co镀层和纯Ni镀层;λ为20 nm时,Ni/Co多层镀层的硬度和耐磨损性能最好。

Preparation and Properties of Ni/Co Nanometer Multilayer Coating Prepared by Jet Electrodeposition

Ni/Co nanometer multilayer coating was prepared by the method of single fluid jet electrodeposition with different modulation cycles (λ),and the surface morphology and structure,microhardness and wear resistance of the coating were tested and analyzed.Results showed that the coating had obvious boundaries between each layer,and the coating was compact and uniform and adhered to the low carbon steel strongly.With the decrease of the modulation cycle,the plating surface of Ni/Co nanometer muhilayer coating was denser and smoother.The hardness and wear resistance of Ni/Co coating with multi-layer structure had an obvious advantage over those of pure Co and Ni plating.Besides,the hardness and wear resistance performance was the best when the modulation cycle was 20.