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    Investigation of High Voltage Anodic Plasma (HVAP) Ag-DLC Coatings on Ti50Zr with Different Ag Amounts

    Year: 2019

    Journal: Coatings, Volume 9, DEC

    Authors: Stoian, Andrei Bogdan; Surdu-Bob, Cristina; Anghel, Alexandru; Ionita, Daniela; Demetrescu, Ioana

    Organizations: Romanian Government National Council of Scientific Research in Higher Education (CNCSIS) Executive Unit for Financing Higher Education, Research, Development and Innovation (UEFISCDI)Consiliul National al Cercetarii Stiintifice (CNCS) [PN-III-P4-ID, PCE 2016-0316, PN 19150101]

    Keywords: TiZr; DLC coating; high voltage anodic plasma; surface properties; electrochemical characterization

    The paper presents the investigation of a series of silver-incorporated diamond-like carbon (Ag-DLC) coatings with increasing Ag content on Ti50Zr and deposited using high voltage anodic plasma (HVAP). The coatings surface properties were analyzed with scanning electron microscope (SEM), atomic force microscope (AFM), and contact angle determinations. Electrochemical tests were performed in Afnor artificial saliva and evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy. Based on these properties, comparisons of coatings performance were linked with the amount of deposited Ag. Increasing the Ag content led to the increase of the corrosion resistance and to the decrease of the forces exhibited on the surface. The hydrophobic character of the coating with the highest Ag amount could prevent thrombosis, thus suggesting its possible use for medical implants.
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