Synthesis of nanocrystalline titania films by micro-arc oxidation

Nanocrystalline titania films were synthesized by micro-arc oxidation of titanium substrates in an electrolytic solution using a pulsed power supply. X-ray diffraction (XRD) indicated that the deposited films consisted of a high crystalline anatase phase. Field emission scanning electron microscopy (FESEM) showed that the films were macro-porous with 1-2 mum pores and the matrix was composed of 10-20 nm grains. The adhesion-tension test showed that the films had an adhesive strength of 20 +/- 2MPa. Such firmly adhesive, porous and nanocrystalline anatase films are expected to have significant applications as orthopaedic/dental implants and catalysts. (C) 2002 Elsevier Science B.V. All rights reserved.