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Registration Number

0223U000912, 0120U102129 , R & D reports

Title

Principles of formation of dielectric nanostructured coatings of transition metal oxynitrides by the method of reactive ion-plasma synthesis.

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Head

Dudin Stanislav V.,

Registration Date

21-01-2023

Organization

V.N. Karazin Kharkiv National University

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 Processes in reactive plasma during magnetron deposition of tantalum oxynitride with ICP-activation of the reactive gas depending on the proportion of oxygen were studied. The results of spectroscopic research of optical radiation from plasma and mass spectrometry of gas composition in a vacuum chamber in response to ignition of a magnetron discharge and inductively coupled plasma are presented. A study of the discharge characteristics of a new combined low-energy ion-beam - magnetron sputtering system was conducted. The physico-mechanical properties of complex composite films of the Ta-O-N system of various compositions and structures were studied, and the optimal energy conditions for the formation of films with the best physico-mechanical characteristics were determined. The surface morphology and topography of TaON coatings were studied using atomic force and scanning electron microscopy, and the structure, chemical composition, and distribution of elements were analyzed using EDX, XRD, and XPS methods. The influence of the structural and morphological properties of the surface of Ta, Ta2O5 and TaON oxynitride films on the functional characteristics of ceramic coatings and their correlation with platelet adhesion in in vitro tests was studied. The results of in vitro tests demonstrated that the deposition of Ta-based coatings leads to a shift of surface properties to a more hydrophobic region, which leads to a decrease in platelet adhesion and an increase in antimicrobial properties compared to stainless steel. It was concluded that TaN and TaON coatings, which have a special complex of mechanical and tribological properties, can be used as the top layer for stents.

Product Description

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Zykov Oleksandr V.
Lisovskiy Valeriy O.
Yakovin Stanislav D.

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2023-01-21