Abstract
Abstract Bioactive porous CaTiO 3 -contained titania coatings doped with cerium were prepared on CP-Ti surfaces by micro arc oxidation (MAO) process. The surface morphologies, chemical composition, wettability and the phase compositions of coatings were investigated by scanning electron microscopy (SEM), energy dispersion X-ray spectrometry (EDS), contact angle goniometer and X-ray diffraction (XRD), respectively. The results showed the surface phase compositions of the as-synthesized coatings are anatase, rutile TiO 2 and perovskite CaTiO 3 phases, as well as a few amorphous phases. The participation of Ce in the electrolyte during MAO is evidenced to benefit in crystallizing CaTiO 3 phase and enhancing the coating surface hydrophilicity. The results of simulated body fluid (SBF) immersion experiments indicate that the hydrolysis of CaTiO 3 during immersion could enhance the nucleation and growth of apatite. In comparison, the porous Ce-doped titania coating containing CaTiO 3 exhibits better bioactivity as more apatites were observed at the same immersion duration.
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