Characteristics of multi-layer coatings synthesized on Ti6Al4V alloy by micro-arc oxidation in silver nitrate added electrolytes


Muhaffel F., Cempura G., Menekse M., Czyrska-Filemonowicz A., Gül Karagüler N., Çimenoğlu H.

Surface and Coatings Technology, vol.307, pp.308-315, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 307
  • Publication Date: 2016
  • Doi Number: 10.1016/j.surfcoat.2016.09.002
  • Journal Name: Surface and Coatings Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.308-315
  • Keywords: Ti6Al4V, Micro-arc oxidation, Multi-layer coating, Titania, Hydroxyapatite, Silver, Antibacterial, IN-VITRO CYTOTOXICITY, ANTIBACTERIAL PROPERTIES, BIOLOGICAL-PROPERTIES, ION RELEASE, TITANIUM, COMPOSITES, FILMS
  • Istanbul Technical University Affiliated: Yes

Abstract

© 2016Multi-layer coatings (composed of outer hydroxyapatite and inner titania layers) have been synthesized on Ti6Al4V alloy for biomedical applications by employing micro-arc oxidation at positive and negative voltages of 400 and 80, respectively. Addition of silver nitrate (at concentrations of 0.1 g/L and 0.4 g/L) into the calcium acetate hydrate and disodium hydrogen phosphate anhydrous containing base electrolyte provided an enhancement in bio- and antibacterial activities of the synthesized coating, while imposing precipitation of silver nanoparticles on the hydroxyapatite layer. It is finally concluded that addition of 0.1 g/L AgNO3 into the base electrolyte is promising for MAO process of titanium-based implants, when the structural characteristics and risk of cytotoxicity are of concern for the synthesized multi-layer coatings.