Influence of Nitride Coatings on Corrosion Resistance and the Biocompatibility of Titanium Alloy Products
Catherine Sotova,
Oleg Yanushevich,
Natella Krikheli,
Olga Kramar,
Alexey Vereschaka,
Semen Shehtman,
Filipp Milovich,
Valery Zhylinski,
Anton Seleznev,
Pavel Peretyagin
Affiliations
Catherine Sotova
Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky Lane 3a, 127055 Moscow, Russia
Oleg Yanushevich
Scientific Department, Federal State Budgetary Educational Institution of Higher Education, “Russian University of Medicine” of the Ministry of Health of the Russian Federation, Dolgorukovskaya Str. 4, 127006 Moscow, Russia
Natella Krikheli
Scientific Department, Federal State Budgetary Educational Institution of Higher Education, “Russian University of Medicine” of the Ministry of Health of the Russian Federation, Dolgorukovskaya Str. 4, 127006 Moscow, Russia
Olga Kramar
Scientific Department, Federal State Budgetary Educational Institution of Higher Education, “Russian University of Medicine” of the Ministry of Health of the Russian Federation, Dolgorukovskaya Str. 4, 127006 Moscow, Russia
Alexey Vereschaka
Institute of Design and Technological Informatics of the Russian Academy of Sciences (IDTI RAS), Vadkovsky Lane 18a, 127055 Moscow, Russia
Semen Shehtman
Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky Lane 3a, 127055 Moscow, Russia
Filipp Milovich
Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology “MISiS”, Leninsky Prospect 4, 119049 Moscow, Russia
Valery Zhylinski
Department of Chemistry, Technology of Electrochemical Production and Electronic Materials, Belarusian State Technological University, 13a, Sverdlov Street, 220006 Minsk, Belarus
Anton Seleznev
Scientific Department, Federal State Budgetary Educational Institution of Higher Education, “Russian University of Medicine” of the Ministry of Health of the Russian Federation, Dolgorukovskaya Str. 4, 127006 Moscow, Russia
Pavel Peretyagin
Department of High-Efficiency Machining Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky Lane 3a, 127055 Moscow, Russia
The bioadhesion of bacteria to the surface of samples with Ti–TiN, Zr–ZrN, Zr–(Zr, Nb)N, and Zr–(Zr, Hf)N coatings was studied via incubation with gram-positive strains of Staphylococcus aureus. The samples were kept at 25 °C for 30 days in a 3% NaCl solution. The deposition of coatings slows, whereas oxidation processes intensify. The oxygen content on the TiN and (Zr, Nb)N coating surfaces was higher than that of the Ti sample without a coating. Samples with ZrN and, especially, (Zr, Hf)N coatings resist oxidation better. Regarding bioactivity toward S. aureus, the highest density of biological forms was observed on the surfaces of TiN and (Zr, Hf)N coatings. The lowest density was on the surfaces of uncoated, ZrN-coated, and (Zr, Nb)N-coated samples. On Ti–TiN, Zr–ZrN, and Zr–(Zr, Nb)N coatings, the formation of surface biostructures of a filamentary type was observed. In the uncoated sample, the biostructures have an island character, and in the sample with a Zr–(Zr, Hf)N coating, the formation of extensive areas of biostructures was observed. Between the biostructures and coating, a layer 5 to 15 nm thick was observed, presumably associated with bacterial adhesion. The presence of biostructures on the coating surface can activate or slow oxidation processes.
