电沉积制备梯度纳米结构铜镀层及其摩擦学行为  

Electrodeposition of gradient nanostructured copper coating and its tribological behavior

作　　者：列锦政 黄泽雄 揭晓华[1,2] 麦永津 LIE Jinzheng;HUANG Zexiong;JIE Xiaohua;MAI Yongjin(Guangdong University of Technology,Guangzhou 510006,China;Guangdong Advanced Metal Materials and Forming Technology Research Center,Guangzhou 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006 [2]广东省先进金属材料及成形加工工程技术研究中心,广东广州510006

出　　处：《电镀与涂饰》2023年第7期1-7,共7页Electroplating & Finishing

基　　金：广州市科技计划(201904010406)。

摘　　要：先通过测量铜电沉积的阴极极化曲线得到电镀铜的适宜电流密度,再在不同电流密度下电沉积不同时间,得到总厚度为40μm的梯度纳米结构(GNS)铜镀层。通过循环摩擦磨损试验研究了GNS铜镀层在室温干摩擦条件下的摩擦磨损行为。结果表明,GNS铜镀层呈现两个不同的摩擦磨损阶段。在第一稳态阶段,铜镀层亚表层结构稳定,为形成完整的Cu_(2)O薄膜提供了保障,磨损机制以氧化磨损为主,摩擦因数约为0.20,磨损率为2.53×10^(−6)mm^(3)/(N·m);在第二稳态阶段,铜镀层表面的亚表层结构变得粗大并产生裂纹,Cu_(2)O薄膜发生脱落和破损,磨损机制转变为疲劳磨损,摩擦因数和磨损率都增大。The suitable current density for copper electrodeposition was determined by measuring the cathodic polarization curve of copper electrodeposition.A gradient nanostructured(GNS)copper coating with a total thickness of 40μm was then obtained by electrodeposition at different current densities for different time.The tribological behavior of GNS copper coating under dry sliding condition at room temperature was studied by cyclic friction and wear test.The results showed that the GNS copper coating underwent two different frictional wear stages.At the first steady-state stage,the sub-surface of GNS copper coating was stable,ensuring the formation of an integral Cu_(2)O film.The main wear mechanism at this stage was oxidative wear with a friction factor about 0.20 and a wear rate of 2.53×10^(−6)mm^(3)/(N·m).At the second steady-state stage,the sub-surface structure became rough with some cracks,the Cu_(2)O film was broken and peeled off,and the wear mechanism transferred to fatigue wear with higher friction factor and wear rate.

关 键 词：铜 电沉积 梯度纳米结构 摩擦磨损 亚表层结构 

分 类 号：TQ153.14[化学工程—电化学工业]