Innovative fabrication of ZrO_2-HAp-TiO_2 nano/micro-structured composites through MAO/EPD combined method

摘要

ZrO_2-Hap-TiO_2 porous layers were fabricated by micro arc oxidation/electrophoretic deposition hybrid processes in the electrolytes consisted of p-glycerophosphate, calcium acetate, sodium phosphate, and yttria-stabilized zirconia within short times and only in one step. The layers had a porous structure with a pores size of 50-750 nm. They contained anatase, hydroxyapatite, monoclinic ZrO_2, tetragonal Z1O_2, and some minor phases with a varying fraction depending on time. Increasing the time, the tetragonal ZrO_2 transformed to monoclinic ZrO_2. Moreover, hydroxyapatite relative content decreased with time. The nanosized zirconia particles (d=20-40 nm) were dispersed on the surface and in the layers depth.