Preperty Of TiO₂ Ceramic Coatings Formed By Micro-Arc Oxidation

The growth process of ceramic coatings formed by micro-arc oxidation on titanium were studied by the analysis of the surface and sectional pattern for ceramic coatings that treated by different electrical parameter and electrolyte.The results indicate that the choice and control of electrical parameter play a key role in the surface morphology and growth of ceramic coatings.With the Prolonging oxidation time the micropores number on the surface of the coatings decreases obviously, while the size and the deviation of micropores increases under constant electrical parameters.The current density,voltage and duty cycle have a influencing rule to morphology of ceramic coatings were similar to oxidation time.As the frequency increased, the micropores number on the surface of the coatings increases, the Pores size and the deviation of mieropores decreased, so did the surface roughness. At the same time, the impact of the electrolyte is also essential. By the experimental analysis we concluded that the performance of the ceramic coatings which was treated in the phosphate electrolyte was better than the others.