脉冲沉积占空比对Ni-Co-ZrO_2复合镀层摩擦磨损性能的影响  

Influence of Pulse Duty Cycle on the Wear Resistance of Electrodeposited Ni-Co-ZrO_2 Composite Coatings

作　　者：佘晓林 孙万昌[1] 张磊 侯嵬玮[1] 苗春雨[1] 

机构地区：[1]西安科技大学,陕西西安710054 [2]中国船舶重工集团第十二研究所,陕西兴平713102

出　　处：《稀有金属材料与工程》2013年第S1期297-300,共4页Rare Metal Materials and Engineering

基　　金：陕西省教育厅专项科研计划项目(11JK0824);榆林市产学研科技计划项目

摘　　要：通过脉冲电沉积的方法制备了Ni-Co-ZrO2复合镀层,确定了最佳的镀液配方和工艺参数,利用扫描电镜、能谱仪分别观察和分析了复合镀层的显微形貌及成分组成,探讨了脉冲占空比对Ni-Co-ZrO2复合镀层耐磨性能的影响。结果表明:所制备的复合镀层厚度约为55μm,镀层与基体之间结合良好,ZrO2颗粒均匀分布于镀层内部。ZrO2颗粒的加入改善了镀层的显微形貌,显著提高了镀层的耐磨性能。随着占空比的降低,沉积晶粒细化,复合镀层的耐磨性能得以改善,最佳占空比为40%。Ni-Co-ZrO2 composite coatings on the substrate of Q235 steel was prepared by pluse electrodeposition, the optimized experimental parameters and solution constitutes were confirmed. The surface and cross-section morphologies and components of the composite coatings were investigated by means of scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. Meanwhile, the influence of duty cycle on the wear resistance of Ni-Co-ZrO 2 composite coating was explored. The results show that the thickness of the Ni-Co-ZrO2 composite coating is 55 μm approximately. A good adhesion between substrate and coating is obtained and ZrO2 particles are uniformly distributed in the coating. With the addition of ZrO2 particles, an obvious change appears in the microstructure of deposits. In addition, the wear resistance of composite coating is significantly improved due to this fine grain, which is resulted from the decrease of duty cycle. The best wear resistance is obtained at the duty cycle of 40%.

关 键 词：脉冲电沉积 复合镀层 占空比 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]