电刷镀n-Al_2O_3/Ni-Co纳米复合镀层的制备及摩擦学性能  

Preparation and Tribological Performance of n-Al_2O_3/Ni-Co Composite Coatings by Electro-Brush Plating

作　　者：汪笑鹤[1] 胡振峰[2] 吕镖[2] 李锋[1] 丁光雨 WANG Xiao-he;HU Zhen-feng;LYU Biao;LI Feng;DING Guang-yu(Laboratory for Effects of Environments on Materiel,China Huayin Ordnance Test Center,Huayin 714200,China;National Engineering Research Center for Mechanical Product Remanufacturing,Academy of Armored Force Engineering,Beijing 100072,China)

机构地区：[1]中国华阴兵器试验中心武器装备环境效应实验室,陕西华阴714200 [2]装甲兵工程学院机械产品再制造国家工程研究中心,北京100072

出　　处：《材料保护》2018年第8期69-72,85,共5页Materials Protection

基　　金：国家自然科学基金(51505484; 51605491)资助

摘　　要：为替代在摩擦条件下应用的硬铬镀层,制备了n-Al2O3/Ni-Co合金纳米复合电刷镀层。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和摩擦磨损试验(CETR)研究了镀层的表面形貌、纳米颗粒分布和摩擦学性能,并与硬铬镀层对比。结果表明:合金纳米复合电刷镀层表面光亮平整,纳米颗粒弥散分布在镀层组织中,与基质金属结合紧密,含量为1.91%(质量分数),能起到明显的强化作用;纳米复合电刷镀层的硬度提高到960HV0.5 N,超过了硬铬镀层的;合金纳米复合镀层的摩擦系数小于硬铬镀层,磨痕深度低于硬铬镀层,即纳米颗粒在合金纳米复合镀层中的共沉积使镀层的摩擦学性能提高,达到了替代硬铬镀层使用的摩擦学性能要求。In order to substitute for hard chromium plating coating under friction conditions, n-Al2O3/Ni- Co alloy nanocomposite was prepared by electro-brush plating.The surface topography, nanoparticle distribution and tribological performance of nanocomposite plating coating were studied using scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and mechanical and tribological test equipment （ CETR）, and meantime compared with those of hard chromium. Results showed that plating coating surface was bright and flat, and nanoparticles were dispersed in plating coating tissue and adhered closely to matrix metal with content of 1.91%（ mass fraction）, which significantly showed the strengthening effect. The hardness of nanocomposite plating coating was increased to 960 HV0.5 N, beyond that of hard chromium plating coating. The wear scar depth of alloy nanocomposite plating coating was less than that of hard chromium plating coating, and the friction coefficient was also less than that of hard chromium plating coating. The co-deposition of nanoparticles in alloy nanocomposite plating coating improved the tribological performance of plating coating and reached the requirement of tribological property to replace hard chromium plating coating.

关 键 词：电刷镀 纳米颗粒 复合镀层 微观结构 硬度 摩擦学性能 

分 类 号：TQ153.2[化学工程—电化学工业] TH117.1[机械工程—机械设计及理论]