Nanocomposites and nanomaterials

Color change of PVD zirconium-based oxycarbonitride coatings obtained at various deposition parameters
Taran A.V.1, Garkusha I.E.,1, Misiruk O.I.1, Tymoshenko O.I.1 
Romaniuk S.P.2  
1 National Science Center “Kharkiv Institute of Physics and Technology” (NSC KIPT) Institute of Plasma Physics
Academicheskaya, 1, Kharkiv, Ukraine
E-mail: avtaran@ukr.net
2 The State Biotechnology University, Kharkiv, Ukraine

The results of experiments on the application of decorative coatings based on Zr were investigated. Decorative coatings were synthesized by the method of vacuum-arc deposition on samples of stainless steel with dimensions of 20 × 20 × 2 mm [1-3]. Before coating, the samples were cleaned in an ultrasonic bath with isopropanol for 10 minutes. 
The cathode was made of chemically pure zirconium (99.99%). The first step was to clean the samples by bombarding the surface with zirconium ions. This was achieved by applying a negative pulse bias with an amplitude of 1200 V at a frequency of 50 kHz from a high-voltage power supply. Then, to improve adhesion, before applying carbonitride and oxycarbonitride coatings, a thin buffer layer of zirconium with a thickness of 20 nm was applied. N2, O2 and CxHy (propane-butane) gas mixture in different proportions was used for decorative coatings. The coating time was 2 minutes. The structure and chemical composition of the coatings was investigated by SEM with EDS.

1.	Taran A.V. V.S. Taran, I.E. Garkusha. ZrO2/ZrN multilayers on bare sintered ndfeb magnets by ion-plasma deposition with pulsed biasing //High Temperature Material Processes. -2020. -23(3). P.1–12.
2.	Taran A.V. V.V. Starikov. Correction of malocclusion by Nd-Fe-B magnets // Journal of Biological Physics and Chemistry. -2020.-20. P.54–59. 
3.	Taran A.V. Functional protective ZrN coatings on implants for trauma surgery problems of atomic science and technology //Problems of Atomic Science and Technology. Series: Plasma Physics. -2020.-6 (130).  P.115-118.