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 tetrachlori...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 and at 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 5000 sliding 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, and under high load was adhesive wear. The TiO_2 -ZrO_2 films show potential applications as coatings for antiwear and friction reduction under the harsh condition.展开更多
文摘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 and at 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 5000 sliding 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, and under high load was adhesive wear. The TiO_2 -ZrO_2 films show potential applications as coatings for antiwear and friction reduction under the harsh condition.
