Fabrication and characterization of HAp-YSZ composite coatings using plasma electrolytic oxidation for orthopedic applications

This contribution endeavored to enhance the overall characteristics of hydroxyapatite-Yttria-stabilized ZrO۲ (HAp-YSZ) composite coating deposited on the Ti۶Al۴V metallic implant using a plasma electrolytic oxidation (PEO) technique. The influence of the YSZ nanoparticles concentration, in the range of ۰-۵ g/L, in the electrolyte on the final performance of the deposits is treated. While the increased concentration of the nanoparticles had no marked effect on the phase composition, a denser and more compact layer is obtained when ۳ g/L YSZ is loaded. An increase of ۴۲.۸% in microhardness is obtained for composite coating compared to the HAp one. The corrosion behavior of the samples was studied utilizing electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization assays. Results showed a ۶۷% decrease in corrosion current density with the included nanoparticles. Given a possible application in tissue engineering, in vitro biocompatibility tests, using the SAOS-۲ cell line were carried out. The obtained results show the positive influence of the added YSZ nanoparticles on cell viability and proliferation. The developed metallic-ceramic hybrid system is believed to open numerous possibilities in efficient corrosion-resistant, anti-bacterial, and bioactive dental implants.

کلیدواژه ها:

Ti۶Al۴V metallic implant ، plasma electrolytic oxidation ، HAp-YSZ ، biological properties ، corrosion