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High oriented TiO_2-ZrO_2 composite thin films on Si (100) and glass sheet were suc-cessfully prepared by sol-gel process followed by dip-coating the ethanol solution of zirconiumoxychloride and titanium tetrachloride. The sol-gel process, microstructure, morphology and tri-bological properties of TiO_2 -ZrO_2 films were investigated using TGA, DSC, XPS, XRD, AFM anddynamic-static tribometer. The results show that the TiO_2-ZrO_2films are dense, homogeneous andat a complete tetragonal phase with an excellent antiwear and friction reduction performance. Un-der 0.5N applied load, the friction coefficient is 0.14-0.20 and the antiwear life is more than 5000sliding cycles for both TiO_2-ZrO_2/ AISI 52100 steel and TiO_2-ZrO_2/ Si_3N_4. SEM observation sug-gests that wear mechanism of TiO_2 -ZrO_2 composite film under low load was fatigue wear, andunder high load was adhesive wear. The TiO_2 -ZrO_2 films show potential applications as coatingsfor antiwear and friction reduction under the harsh condition.
High oriented TiO_2-ZrO_2 composite thin films on Si (100) and glass sheet were suc-cessfully prepared by sol-gel process followed by dip-coating the ethanol solution of zirconium oxychloride and titanium tetrachloride. The sol-gel process, microstructure, morphology and tri-bological properties of TiO_2 -ZrO_2 films were investigated using TGA, DSC, XPS, XRD, AFM and dynamic-static tribometer. The results show that the TiO_2-ZrO_2films are dense, homogeneous andat a complete tetragonal phase with an excellent antiwear and friction reduction performance. Un-der 0.5N applied load, the friction coefficient is 0.14-0.20 and the antiwear life is more than 5000sliding cycles for both TiO_2-ZrO_2 / AISI 52100 steel and TiO_2-ZrO_2 / Si_3N_4. SEM observation sug-gests that wear mechanism of TiO_2 -ZrO_2 composite film under low load was fatigue wear, andunder high load was adhesive wear. The TiO_2 -ZrO_2 films show potential applications as coatings for antiwear and friction reduction under the ha rsh condition.