Determination of the thickness and crystalline structure of TiO2 coatings made by anodic oxidation of Ti-6Al-4V

M.L. VERA; M.A. ALTERACH; M.R. ROSENBERGER; D.G. LAMAS; C.E. SCHVEZOV; A.E. ARES

Otro; Activity Report LNLS; 2009

Laboratorio Nacional de Luz Sincrotron

At present Ti-6Al-4V alloy is used in prosthetic devices for human implants due to the excellent corrosion resistance, bioand hemo-compatibility, which are known to be associated to the formation of TiO2 on the surface. Oxide films in metals can also be produced by anodic oxidation, resulting in filmsthicker than the natural oxides. By anodizing at low voltages smooth and amorphous films can be obtained. For haemocompatible applications smooth and crystalline TiO2 films are required. One way to obtain such kind of films isdoing a thermal treatment after anodic oxidation. TiO2 films on Ti-6Al-4V substrates were produced by anodic oxidation at different voltages with and without thermal treatment. Thicknesses and phases were determined. The results of the influence of process parameters on color, thickness, and crystalline structure of the films are presented.