Titania Reinforced Hydroxyapatite Thin Film Coatings for Orthopedic Applications

The titania reinforced hydroxyapatite (THAP) thin films were deposited on Ti6Al4V substrates using a dip-coating technique. The concentration of titania in the HAP matrix was fixed at 10 wt%. The as-prepared THAP coatings were sintered at 800 °C before characterization. The coatings were analyzed for their phase and morphological structures. The corrosion resistance of the coatings was investigated using potentiostatic and potentiodynamic tools. The results revealed that the coatings were composed of the HAP phase with other secondary phases, including CaCO3 and CaO. The coatings were uniformly spread across the substrates. The deposition of coatings enhanced the corrosion resistance of the substrates. The preliminary examination confirmed that the THAP coatings can enhance orthopedic alloys’ corrosion resistance, making them suitable for orthopedic implant applications.