Influence of TiO2/ZrO2 Multilayer Coatings on the Microstructure, Corrosion, Two-Body Wear Behavior, and Antibacterial Properties of Ti15Mo Alloys for Biomedical Applications
Journal of Materials Engineering and Performance, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s11665-026-15441-2
- Dergi Adı: Journal of Materials Engineering and Performance
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Compendex, INSPEC, Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: antibacterial properties, multilayer coating, PVD, Ti15Mo alloy, two-body wear
- Atatürk Üniversitesi Adresli: Evet
Özet
Ti15Mo β-type titanium alloys are promising biomaterials owing to their favorable elastic modulus and biocompatibility; however, their relatively poor wear resistance and surface stability limit their long-term clinical performance. This study investigates the effect of TiO2/ZrO2 multilayer coatings deposited by physical vapor deposition (PVD) on Ti15Mo substrates for dental and orthopedic applications. The coatings were characterized by x-ray diffraction (XRD), scanning electron microscopy, x-ray photoelectron spectroscopy (XPS), and nanoindentation. At the same time, corrosion behavior was evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in simulated saliva. A two-body wear test assessed tribological performance, and antibacterial activity was evaluated against representative microbial strains. The results demonstrate that the dense, well-adhered TiO2/ZrO2 multilayer coatings significantly improve hardness, corrosion resistance, wear performance, and antibacterial activity compared with the uncoated alloy. Electrochemical analyses revealed lower corrosion current densities, more noble corrosion potentials, and higher impedance and charge transfer resistance values, confirming the superior barrier effect of the multilayer architecture against electrolyte penetration and charge transfer reactions. The ML-15 coating exhibited the best overall performance, indicating that TiO2/ZrO2 multilayer coatings offer an effective surface engineering strategy to enhance the durability and functionality of Ti15Mo alloys in biomedical applications.