Micro- and nanocomposite Ti-Al-N/Ni-Cr-B-Si-Fe-based protective coatings: Structure and properties

Alexander D. Pogrebnjak, A.A. Drobyshevskaya, Vyacheslav M. Beresnev, М. К. Кылышканов, T. V. Kirik, Sergey N Dub, Fadei Fadeevich Komarov, A.P. Shypylenko, Yu. Zh. Tuleushev

2011

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DOI 10.1134/s1063784211070188

Data confidence 70 medium

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Abstract

A new type of nanocomposite Ti-Al-N/Ni-Cr-B-Si-Fe-based coatings 70–90 μm thick produced by combined magnetron sputtering and a plasma detonation technology is created and studied. Phases Ti 3 AlN + Ti 3 Al 2 N 2 and the phases caused by the interaction of plasma with a thick Al 3 Ti + Ni 3 Ti coating are detected in the coatings. The TiAlN phase has a grain size of 18–24 nm, and other phases has a grain size of 35–90 nm. The elastic modulus of the Ti-Al-N coating is E = 342 ± 1 GPa and its average hardness is H = 20.8 ± 1.8 GPa. The corrosion rate of this coating is very low, 4.8 μg/year, which is about three orders of magnitude lower than that of stainless steel (substrate). Wear tests performed according to the cylinder-surface scheme demonstrate high wear resistance and high adhesion between the thick and thin coatings.