Ce(SO4)2浓度对电喷镀Ni-W-Ce合金镀层性能影响  

Effect of Ce(SO4)2 Concentration on Properties of Ni-W-Ce Alloy Coating Prepared by Jet-electrodeposition

作　　者：傅秀清[1] 王清清 林尽染 沈莫奇 徐烨 Fu Xiuqing;Wang Qingqing;Lin Jinran;Shen Moqi;Xu Ye(Nanjing Agricultural University,Nanjing 210031,China)

机构地区：[1]南京农业大学,江苏南京210031

出　　处：《稀有金属材料与工程》2020年第9期2948-2955,共8页Rare Metal Materials and Engineering

基　　金：China Postdoctoral Science Foundation(2017M621665);Postdoctoral Science Foundation of Jiangsu Province of China(2018K022A);Postgraduate Research&Practice Innovate Program of Jiangsu Province(SJCX19_0145)。

摘　　要：为了研究Ce(SO4)2浓度与合金镀层表面性能的关系,采用电喷镀制备了一系列Ni-W-Ce合金镀层工件。用扫描电镜(SEM)观察了镀层的表面结构,并用能谱仪(EDS)检测镀层中的元素组成。用XRD分析镀层的物相组织,表明Ce(SO4)2加入后镀层发生晶格畸变。使用CFT-Ⅰ型材料表面综合性能测试仪在镀层表面进行磨痕制备,并通过LEXT4100激光共焦显微镜和SEM观察磨痕形貌,表征镀层耐磨性和磨损机理。结果表明,添加Ce(SO4)2改善了涂层的表面微观形貌,当其浓度为0.5 g/L时,涂层的表面质量最佳。同时,显微硬度、耐磨性和耐腐蚀性随浓度的增加呈现先好后坏的规律。当Ce(SO4)2浓度为0.5 g/L时,镀层显微硬度、耐磨性和耐腐蚀性均取得最佳,此时的显微硬度数值达到峰值5196.9 MPa,其耐磨性表征参数均取得最小值,且腐蚀电位为-0.5537V,电弧电抗半径最小。In order to investigate the relationship between Ce(SO4)2 concentration and surface performance,a series of workpieces coated with Ni-W-Ce alloy were fabricated by jet-electrodeposition.The cellular structure was observed by SEM,and the composition of coating was analyzed by EDS.XRD analysis shows that the coating has lattice distortion.LEXT4100 laser confocal microscope was used to observe wear mark and it is found that the friction mechanism changes.The results indicate that the addition of Ce(SO4)2 improves the surface micromorphology of the coating,and the best surface quality appears when the concentration is 0.5 g/L.Meanwhile,the micro-hardness,wear resistance and corrosion resistance show a rule of first getting better and then getting worse with increasing the concentration.When the concentration of Ce(SO4)2 is 0.5 g/L,the micro-hardness reaches the peak value of 5196.9 MPa,and the wear resistance is the best,with the wear resistance parameters dropping to the valley value.The corrosion resistance is also the best with the corrosion potential of-0.5537 V,and the arc reactance radius is the minimum.

关 键 词：电喷镀 Ce(SO4)2 Ni-W-Ce合金镀层 耐磨性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]