15 آذر 1401
علي شانقي

علی شانقی

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / مهندسی موادخوردگی
تلفن:
دانشکده: دانشکده فنی مهندسی

مشخصات پژوهش

عنوان
Investigation on the corrosion behavior and biocompatibility of Ti-6Al-4V implant coated with HA/TiN dual layer for medical applications
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Titanium nitride (TiN), Hydroxyapatite (HA), Ti-6Al-4V, PACVD, Sol-gel, Corrosion behavior, Biocompatibility
سال
2020
مجله SURFACE & COATINGS TECHNOLOGY
پژوهشگران علی شانقی

چکیده

Ti-6Al-4V alloy has wide applications in the medical industry due to its unique mechanical properties and biocompatibility. However, in the long-term use of these alloys, the release of aluminum and vanadium can result in serious illnesses. For solving these problems, the implant surface modification can be done to improve the corrosion and biocompatibility properties. In this study, TiN coating was applied by Plasma-Assisted Chemical Vapour Deposition (PACVD) method along with hydroxyapatite coating (HA) by sol-gel method on Ti-6Al-4V substrate surface. Afterwards, X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Atomic Force Microscopy (AFM) and potentiodynamic polarization and electrochemical impedance tests were used for evaluating the phase, morphology, chemical composition, surface roughness, and corrosion behavior in the simulated body fluid (SBF), respectively. Results showed that the surface roughness of HA/TiN, HA, TiN and substrate specimens were the highest to minimum values with roughness of 30.86±0.5, 25.1±0.42, 20.43±0.14 and 15.1±0.02 nm, respectively, and the HA-TiN composite coating had the lowest corrosion current density, highest polarization resistance and corrosion potential. Results of cell viability and proliferation demonstrated that the HA/TiN nanocomposite coating is a good choice for dental and orthopedic implants due to its corrosion resistance and biocompatibility.