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- Title
In Vitro Corrosion of Titanium Nitride and Oxynitride-Based Biocompatible Coatings Deposited on Stainless Steel.
- Authors
Pana, Iulian; Braic, Viorel; Dinu, Mihaela; Mouele, Emile S. Massima; Parau, Anca C.; Petrik, Leslie F.; Braic, Mariana
- Abstract
The reactive cathodic arc deposition technique was used to produce Ti nitride and oxynitride coatings on 304 stainless steel substrates (SS). Both mono (SS/TiN, SS/TiNO) and bilayer coatings (SS/TiN/TiNO and SS/TiNO/TiN) were investigated in terms of elemental and phase composition, microstructure, grain size, morphology, and roughness. The corrosion behavior in a solution consisting of 0.10 M NaCl + 1.96 M H2O2 was evaluated, aiming for biomedical applications. The results showed that the coatings were compact, homogeneously deposited on the substrate, and displaying rough surfaces. The XRD analysis indicated that both mono and bilayer coatings showed only cubic phases with (111) and (222) preferred orientations. The highest crystallinity was shown by the SS/TiN coating, as indicated also by the largest grain size of 23.8 nm, which progressively decreased to 16.3 nm for the SS/TiNO monolayer. The oxynitride layers exhibited the best in vitro corrosion resistance either as a monolayer or as a top layer in the bilayer structure, making them a good candidate for implant applications.
- Subjects
TITANIUM nitride; TITANIUM corrosion; SURFACE coatings; STAINLESS steel; TIN alloys; ROUGH surfaces; CORROSION resistance
- Publication
Coatings (2079-6412), 2020, Vol 10, Issue 8, p710
- ISSN
2079-6412
- Publication type
Article
- DOI
10.3390/coatings10080710