Abstract: “In this study, the influences of different coatings on wear and scratch performances in simulated body fluid (SBF) solution were investigated. SiO2/TiO2 multilayer, TiO2 and SiO2 coatings were deposited on CP-Ti by sol-gel dip coating process and calcined at 700°C. The phase structure, crosssectional morphology, composition, wear track morphologies, adhesion properties, hardness and roughness of uncoated and coated samples were characterized with X-ray diffraction, scanning electron microscopy (SEM), scratch tester and 3D profilometer. Also, the tribological performances of all samples were investigated by a pin-on-disc tribo-tester against Al2O3 ball in SBF. Results showed that hardness, wear and adhesion resistance of multilayer coated samples were higher than untreated CP-Ti. It was found that the values of these three properties of SiO2/TiO2 multilayer coatings were higher than other coatings. Additionally, the lowest friction coefficient and wear rates were obtained on SiO2/TiO2 m”

Keywords: Multilayer coating; Sol-Gel; Wear; Scratch; Cp-Ti