On PVD coating technique for tribological, bio-compatibility, and corrosion behavior of Ti-based alloys using biomedical applications: A review

Titanium and its alloys are widely used in biomedical applications due to their excellent biocompatibility, corrosion resistance, and mechanical properties. However, to further enhance their performance and extend their lifespan in harsh physiological environments, various surface modification techniques have been explored. PVD is one such technique that has gained significant attention for depositing thin films/coatings on medical implants. PVD coatings offer several advantages, including precise control over coating thickness, composition, and microstructure. Among various PVD coatings, Ti-based coatings, such as Titanium Nitride (TiN), Titanium Carbonitride (TiCN), and Titanium Dioxide (TiO2), have been extensively studied for their potential in improving the wear and corrosion resistance of biomedical implants. The wear and corrosion behavior of Ti-based PVD coatings on 316L SS is of particular interest in the context of this research. 316L SS is commonly used in biomedical implants due to its good corrosion resistance and biocompatibility. However, the addition of Ti-based PVD coatings can further enhance its performance, making it more suitable for long-term implantation.