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- Article name
- Effect of phase and elemental composition, structure and texture of multilayer coatings based on TiCN and TiNbCN and substrate material on their electrochemical behavior in 3 % NaCl solution
- Authors
- KAMENEVA A. L., , annkam789@mail.ru, Federal State Budget Institution of Higher Education "National Research Perm Polytechnic University", Perm, Russia
BUBLIK N. V., , knv143@mail.ru, Perm National Research Polytechnic University, Perm, Russia
KICHIGIN V. I., , kichigin@psu.ru, Perm State National Research University, Perm, Russia
- Keywords
- TiCN multilayer coatings in TiNbCN / structure and electrochemical behavior / 3% NaCl solution
- Year
- 2022 Issue 3 Pages 36 - 46
- Code EDN
- MTPPRK
- Code DOI
- 10.52190/2073-2562_2022_3_36
- Abstract
- Multilayer coatings based on TiCN and TiNbCN layers were obtained on P18 high speed steel by pulsed magnetron sputtering. The content of N2 and CH4 in the gas mixture was changed to obtain nanostructured layers with different phase and elemental composition, structure, and texture degree. The microstructure, defects, phase and elemental composition of the coatings were studied using an Ultra 55 field emission electron microscope with an EDX microanalysis system. The phase composition and texture of the coatings were determined on a Shimadzu XRD-6000 X-ray diffractometer in Cu-Kα radiation. Voltammetry and impedance spectroscopy of coated samples were carried out in 3 % NaCl solution. The electrochemical behavior of the coatings was evaluated by the corrosion current density and polarization resistance (at the corrosion potential). It is shown that the studied coatings are electrochemically active, and corrosion processes occur not only on the substrate in coating discontinuities, but also on its surface. TiN-TiCN-TiCN multilayer coatings with the maximum values of the phase percentage of the three-component phase TiC0.496N0.502 and the texture degree, the minimum values of the carbide phase TiC and Ti, crystallite diameter, internal stresses and crystal lattice deformation have the lowest corrosion current density of 0.75 μA cm-2 among the investigated coatings. Niobium increases corrosion resistance, but the presence of a significant amount of the TiC carbide phase in the TiNbCN coating reduces this effect.
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