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Protective coatings with nanoscale multilayer architecture: current state and main trendsa Sumy State University, ul. Rimskogo-Korsakova 2, Sumy, 244007, Ukraine b East Kazakhstan State Technical University named after D. Serikbayev, Naberezhnaya Krasnykh Orlov 69, Ust-Kamenogorsk, 070000, Kazakhstan c Materials Science Division, Argonne National Laboratory, 9700 South Cass Ave., Argonne, Illinois, 60439, USA d Nazarbayev University Research and Innovation System, Kabanbay batyr Ave. 53, Astana, 010000, Kazakhstan Binary systems (layers) and multicomponent layers with bilayer thicknesses varying from microns to a few nanometers are considered. A strong dependence of the microstructure formation on the deposition conditions (the magnitude of the bias potential, the flow of inert and reactive gases, the ion beam power (current density) supplied to the target) is found. General regularities in the change in the functional properties and structural state of the coatings are formulated. The conditions for the formation of a columnar structure and growth texture are noted; various mechanisms and their interpretation are proposed. The relationship among the size of nanograins, diffusion at the interphase boundary, and effects determining the physico-mechanical, tribological characteristics, as well as resistance to corrosion and oxidation, is shown.
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