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Tentative data are presented on a new type of nanocomposite protective coatings produced by a combination of two technologies: plasma-detonation coating deposition with plasma jets and thin coating vacuum-arc deposition. For coatings of thickness 80-90 µm, the structure, physicomechanical properties, and morphology have been investigated and their hardness, elastic Young modulus, and corrosion resistance in various media have been determined. The grain size of a Ti-N-Cr-based nanocomposite coating varied from 2.8 to 4 nm. The following phases and compounds formed as a result of the plasma interaction with the surface of a thick coating have been detected: (Ti,Cr)N (200), (Ti,Cr)N (220), γ-Ni 3 Fe, hexagonal Cr 2 Ti, Fe 3 Ni, (Fe, Ni)N, and Ti-Ni compounds such as Ti 2 Ni, Ni 3 Ti, Ni 4 Ti 3 , etc. It has been found that the nanocomposite coating microhardness increased to (32 ± 1.1) GPa. The elastic modulus estimated from the loading-unloading curves was (320 ± 20) GPa. The protective coatings demonstrated an increased corrosion resistance in acidic and alkaline media in comparison with that of the stainless-steel substrate.

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