Abstract
The influence of deposition conditions (pressure, bias potential, layer thickness) on the structure and corrosion resistance of vacuum-arc multi-period CrN/Cu coatings is studied. For research, we used the methods of precision XRD, scanning electron microscopy with energy dispersive microanalysis, impedance spectroscopy, and potentiodynamic polarization tests to detect corrosion resistance in a solution of 0.9% NaCl. According to structural studies, phases with an fcc crystal lattice are formed in the layers: Cu and CrN mononitride. In CrN layers obtained at the highest bias potential of –200 V, a change in the lattice period associated with the action of compression stresses was revealed. Tests for corrosion resistance showed that for all the samples studied, the corrosion process has a predominantly anodic reaction. The most corrosion-resistant coatings are those obtained at a pressure of 5·10−4 Torr and the greatest bias potential of −200 V in constant rotation mode. The feature of such coatings is the smallest thickness of copper and CrN layers (about 8 nm), the presence of compression stresses (which enhances adhesion between the layers), and the absence of a pronounced texture (the paths of easy diffusion are minimized).
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Postelnyk, H., Sobol, O., Chocholaty, O., Knyazev, S. (2020). Structure and Corrosion Resistance of Vacuum-Arc Multi-period CrN/Cu Coatings. In: Ivanov, V., Trojanowska, J., Pavlenko, I., Zajac, J., Peraković, D. (eds) Advances in Design, Simulation and Manufacturing III. DSMIE 2020. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-50794-7_52
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