Characterization, mechanical and biomedical properties of titanium oxynitride coating
Buranych V.V. Pogrebnjak A.D. Pogorielov M. Diedkova K. Aubakirova D. Savitskaya I. Kupchishin A.I. Kulenova N.
1 September 2023Elsevier Ltd
Ceramics International
2023#49Issue 1728167 - 28174 pp.
In this study, a titanium oxide-nitride coating was applied to 12Cr18Ni10Ti stainless biomedical steel through reactive magnetron sputtering deposition. The microstructure and chemical bond evolution during film sputtering was tested using different flow rates of oxygen and argon, namely N2/O2 ratios of 1, 1.5, and 2. The obtained samples were analysed by IR spectroscopy, SEM, XPS, and XRD. In addition, the nanoindentation procedure measured the hardness and elastic modulus of each coating. Oxynitride coatings exhibit nanocrystalline structures, where the nitride and oxide phases are in the unbound state. A nitrogen-rich sample demonstrated the crystalline structure of (110)-oriented rutile with 124 nm large clusters. However, with increased oxygen gas flow, the mixed rutile-anatase (111)-oriented phase became more pronounced with fragmented grains 25–27 nm in diameter. The nanoindentation test shows that titanium oxide hardness and deformation resistance depend on its microstructure and orientation. Cell culture experiments show that a coating deposited at regime N2/O2 = 1 allows efficient cell proliferation on pristine steel and other oxynitride samples. The findings of this work benefit understanding the mechanisms of oxynitride barriers in coronary stent modification.
Anatase , Biomedical steel , Magnetron sputtering , Resazurin reduction , Rutile , TiON coatings
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Sumy State University, 2, Rimsky Korsakov Str., Sumy, 40007, Ukraine
University of Latvia, Institute of Atomic Physics and Spectroscopy, Riga, LV-1004, Latvia
D. Serikbaev East Kazakhstan State Technical University, Ust-Kamenogorsk, Kazakhstan
Al-Farabi Kazakh National University, 71 Al-Farabi Avenue, Almaty, 050040, Kazakhstan
Abai Kazakh National Pedagogical University, Pr. Dostyk 13, Almaty, 050010, Kazakhstan
Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Trnava, 917 24, Slovakia
Sumy State University
University of Latvia
D. Serikbaev East Kazakhstan State Technical University
Al-Farabi Kazakh National University
Abai Kazakh National Pedagogical University
Faculty of Materials Science and Technology in Trnava
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