Bone-Like Apatite Formation on the Plasma Electrolytic Oxidation-Treated Ti-6Al-4V Alloy in Solution Containing Si and Mg Ions

The bon-like apatite formation on the plasma electrolytic oxidation (PEO)-treated Ti-6Al-4V alloy in solution containing Si and Mg ions was studied using various experimental techniques. A Ti-6Al-4V ELI disk and implant was used as a substrate for PEO. A pulsed DC power supply was used to apply a potential of 280 V in the electrolyte for 3 min. To examine the bioactivity, the PEO films formed implant specimens were immersed in a simulated body fluid (SBF) for 12 h. PEO-treated surface has large micro-pores and small micro-pores, and 5 Mg/Si and 20 Mg/Si coated surfaces showed the more small micro-pores than that of CaP coated surface. The peaks of the anatase and the hydroxyapatite phases after SBF immersion shifted to the left as compared to before SBF immersion. Numbers of cells increased, as Mg content increased on the PEO treated surface. Bone-like apatite is well formed on the Mg and Si contained surface.