粒径对电沉积Ni-SiC复合镀层性能的影响  

Effects of Particles' Size on Ni-SiC Composite Coatings

作　　者：林志平[1] 黄新民[1] 单传丽[1] 李鹏[1] 郑华明[1] 杨明[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《金属功能材料》2010年第5期53-57,共5页Metallic Functional Materials

摘　　要：采用复合电沉积的方法,在一定的工艺条件下制备出Ni-SiC复合镀层。通过摩擦磨损试验、电化学腐蚀试验,并利用扫描电镜观察镀层的磨损和腐蚀形貌,综合分析了SiC颗粒大小对镀层性能的影响。结果表明:当SiC粒径为2μm,添加量为60 g.L-1时,镀层的显微硬度最高,耐磨性能最佳;复合镀层的耐蚀性比纯镍镀层和钢基体优越,但随着SiC粒径的增大,镀层的耐蚀性反而有所下降。Ni-based coatings with SiC particles were prepared by composite electrodeposition under certain technological conditions.Effects of particles＇ size on the composite coating were analyzed by friction wear test and electrochemical corrosion experiment.Then,wear morphology and corrosion morphology were observed by scanning electron microscope.The results show that the microhardness and wear resistance of coatings reach the best at the particle size of 2 μm,and the addition of 60 g·L-1.What＇s more,the corrosion resistance of composite coating is more superior than those nickel coating and steel substrate,however,the corrosion resistance of composite coating doesn＇t improve with the increase in particles＇ size.

关 键 词：复合镀层 碳化硅 摩擦磨损 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]