超声辅助电沉积Ni-Co/ZrO_2复合镀层的性能研究

采用超声辅助电沉积方法将Ni-Co/ZrO_2纳米复合镀层电镀到铜板表面。在不同纳米粒子添加量下,通过线性扫描伏安(LSV)和交流阻抗(EIS)对电沉积过程进行电化学表征,通过SEM、EDS对镀层的组成和表面形貌进行研究,并分别利用显微硬度计和摩擦磨损试验仪对复合镀层的力学性能和摩擦磨损性能进行表征。结果表明,超声的引入能够有效降低镀液中颗粒的团聚量,提高镀层中纳米粒子的复合量,从而改善复合电沉积过程以及镀层性能。在纳米粒子浓度为10g/L时,镀层的表面形貌、摩擦性能和硬度等性能最优。

Study on Properties of Ni-Co/ZrO2 Composite Coatings Prepared by Ultrasound-Assisted Electrodeposition

Ni-Co/ZrO2 nano-composite coatings were electrodeposited on copper by ultrasound-assisted electroplating. Electrodeposition process was investigated with linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) under different additive amount of nanoparticles. Surface morphology and composition content were investigated by SEM and EDS. Mechanical properties, friction and wear properties of composite coatings were characterized by microhardness tester and friction and wear tester respectively. The results indicate that implementation of ultrasound in composite electroplating processes can improve dispersion and de-agglomeration of particles in electroplating bath, increase particle amount in alloy matrix, so as to improve composite electrodeposition process and coating properties. The coating reaches its optimized performance upon concentration of nano-ZrO2 particles in electrolyte is 10 g/L.