Friction-Reducing Performances of TiO₂ Film Prepared by Sol-Gel Method at Lower Temperature

The TiO₂ film on copper was prepared by using sol-gel technology and hydrothermal treatment. Scanning electron microcopy and X-ray diffraction were used to characterize surface morphology and crystal structure of TiO₂ film. The corrosion resistance and its friction-reducing performance of TiO₂ film were evaluated by polarization curve and friction and wear testing machine, respectively. As comparing to TiO₂ film after conventional calcination at 480 ℃, TiO₂ film after hydrothermally treatment at 170 ℃ showed different surface morphology and crystal structure, lower friction with extended life and better corrosion-resistance.