纳米颗粒分散方法对电刷镀复合镀层组织及性能的影响

为了解决镀液中纳米颗粒的团聚问题,采用高能机械化学法对纳米颗粒进行了分散,在扫描电镜、显微硬度计、球-盘式磨损试验机上对比考察了机械搅拌法和高能机械化学分散法对电刷镀液中纳米颗粒分布和复合镀层组织、显微硬度及含磨料油润滑条件下磨损性能的影响.结果表明,高能机械化学分散法较好地解决了纳米颗粒分散的难题,与机械搅拌法相比,高能机械化学分散法制备的电刷镀液中纳米颗粒分散均匀、团聚少、稳定悬浮时间长,复合镀层中纳米颗粒含量高,镀层组织细小、致密,显微硬度高,含磨料油润滑条件下的耐磨性能好.

Effect of Dispersing Methods on Microstructure and Performance of Electro-Brush Plating Nano-Composite Coating

High - energy mechanical and chemical dispersion method was applied to solve the agglomeration of nano - particles in the bath solution. The microstructure, hardness and wear behavior in oil containing contaminant abrasive particles of nano -particle electro - brush plating composite coating prepared by mechanical agitating and high-energy mechanical and chemical dispersion were compared by using SEM, micro-hardness tester and ball - on - disk tribometer. The results show that the high - energy mechanical and chemical dispersion is an ideal method to disperse the nano-particles in the bath solution. The nano - particles can e-venly scatter in the electrolyte for a long time. The microstructure , micro - hardness and wear resistance of nano - composite coating prepared by the high - energy mechanical and chemical dispersion method is better than that by mechanical agitating.