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Plasma Medicine
SJR: 0.271 SNIP: 0.316 CiteScore™: 1.9

ISSN Imprimir: 1947-5764
ISSN En Línea: 1947-5772

Plasma Medicine

DOI: 10.1615/PlasmaMed.2020034060
pages 61-69

Development of Niobium Based Coatings Prepared by Ion-Plasma Vacuum-Arc Deposition

V. S. Taran
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
I. E. Garkusha
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine; V.N. Karazin Kharkiv National University, Kharkiv, Ukraine
O. I. Tymoshenko
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
A. V. Taran
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
Ivan O. Misiruk
National Science Center "Kharkiv Institute of Physics and Technology" (NSC KIPT), Institute of Plasma Physics, Kharkiv, Ukraine
T. S. Skoblo
Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine
S. P. Romaniuk
Kharkiv Petro Vasylenko National Technical University of Agriculture, Kharkiv, Ukraine
V. V. Starikov
National Technical University "Kharkiv Polytechnic Institute", Kharkiv, Ukraine
A. A. Baturin
National Technical University "Kharkiv Polytechnic Institute", Kharkiv, Ukraine
G. P. Nikolaychuk
National Technical University, Kharkiv Polytechnic Institute, Kharkiv, Ukraine

SINOPSIS

Comparative studies of niobium carbide and niobium carbonitride coatings deposited on AISI 430 stainless steel have been presented. The NbC and NbCN coatings have been deposited by vacuum-arc evaporation in Bulat-type device by using the pulsed biasing mode with repetition frequency 50 kHz, allowing decreasing the micro-arcs formation. An additional magnetic coil for plasma flow focusing was used, allowing one to enhance deposition rate up to 35 µm/h. The phase composition of the obtained coatings was analyzed via X-ray diffraction. The surface morphology was monitored by scanning electron microscopy; whereas, chemical composition was examined by using energy dispersive X-ray analysis. X-ray fluorescent analysis was used to evaluate the thickness of the coatings. The reflectance R(λ) of the obtained coatings in the wavelength 300−625 nm at normal incidence was measured. The XRD data from NbC coating revealed the existence of the niobium carbide phase with a NaCl-type lattice with fine-crystalline grains ranging from 14 to 16 nm. For the NbCN coating, the two-phase state with c-NbC and hexagonal NbN0.95 phases was monitored. The average grain size for c-NbC phase comprised 16−17 nm; whereas, for NbN0.95 the average grain size was only 1−2 nm, confirming formation of a nanocrystalline structure. Surface nanomechanical behavior under nanoindentation of NbC and NbCN was studied. It was revealed that nanohardness for a NbC coating was varied from 30 to 43 GPa; whereas, for NbCN the data spread comprised 30−48 GPa. It was established that the surface of the grown coatings was very smooth with an extremely low amount of macroparticles.

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