Coatings of Bioactive TiO2 Films on TI6AL4V Alloy by Micro Arc Oxidation

Abstract

Micro arc oxidized TiO2 coatings were prepared in different concentrations of (CH3COO)(2)Ca center dot H2O and different coating times on biomedical Ti6Al4V alloy. The surface topography, phase, and element composition of the coatings were characterized by scanning electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectrometry, respectively. The micro arc oxidation treated Ti6Al4V alloy was immersed in a simulated body fluid to study the bioactive deposition properties on the surface of TiO2 coating. Immersion tests indicate that the specimens coated in the high rate Ca-containing electrolyte are most effective when compared with the specimen containing less Ca-content.