Friction Behavior of Copper Deposited by Micro-arc Oxidation on Pure Titanium Surface under Lubrication Conditions

Author of the article:LUO Jinjie, JI Anping, ZUO Duquan, ZHAO Yingjie, DENG Zhenghua

Author's Workplace：College of Mechanical Engineering, Chongqing Three Gorges University, Chongqing 404000, China

Key Words： titanium; plated copper; lubrication; friction

Abstract：At present, nanostructured modification of the surface of pure titanium has received extensive attention, but few studies on the tribological properties of nanostructured titanium surfaces have been reported. A TiO 2 mesoporous layer with an ~400 nm pore size was prepared on the surface of pure titanium by micro-arc oxidation to improve the tribological properties of titanium. Copper was deposited onto this mesoporous layer by electrochemical pulse deposition. The friction behavior of the modified layer under lubrication was investigated by friction testing. The surface morphologies and wear scars of the modified layer were characterized by scanning electron microscopy (SEM). The results indicate that the TiO 2 nano-mesoporous layer affects the particle size and shape of the deposited copper. Furrow wear is characterized as the primary wear mechanism of micro-arc oxidation while micro-arc oxidation samples with copper deposition show excellent wear reduction under lubrication.