Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (08): 2317-2322.doi: 10.3866/PKU.WHXB20100816


Tribological Properties of Cu-Doped TiO2 Films

CHAO Wen-Liu1, WAN Yong1, WANG Yun-Xia2, LIU Chang-Song1   

  1. 1. School of Mechanical Engineering, Qingdao Technological University, Qingdao 266033, Shandong Province, P. R. China;
    2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
  • Received:2010-01-25 Revised:2010-04-02 Published:2010-07-23
  • Contact: WAN Yong
  • Supported by:

    The project was supported by the Natural Science Foundation of Shandong Province, China (Y2008F05) and Applied and Basic Research Foundation of Qingdao, China (09-1-3-35-jch).


Undoped TiO2 and Cu-doped TiO2 (Cu-TiO2) nano-structured thin films were prepared by a sol-gel process on glass substrates. We investigated their structures, surface morphologies, and tribological properties by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), X-ray diffraction (XRD), and friction and wear testing using a UMT-3 tester. We found that the prepared Cu-TiO2 films were smoother and more uniform than the undoped TiO2 films and they had better friction-reducing and anti-wear properties. The amount of Cu dopant directly affects the tribological performance of the doped TiO2 film. The 5%(mole fraction) Cu-TiO2 film possesses the longest wear life and the lowest friction coefficient.

Key words: TiO2, Sol-gel, Thin film, Cu doped, Tribological property