STRUCTURE AND CORROSION RESISTANCE OF VACUUM-ARC MULTI-PERIOD CrN/Cu, ZrN/Cu, AND NbN/Cu COATINGS

Abstract

The structure and properties of vacuum-arc multi-period composite coatings of the MeN/Cu system (where Me is Cr, Zr, and Nb) are studied. It was found that at the smallest nanolayer thickness (about 8…10 nm) of composites in the layers of all systems, only a phase with an fcc lattice is formed, without a pronounced texture in the nitride layers. For ZrN and CrN, the phases with an fcc lattice are equilibrium, and for NbN, they are nonequilibrium. An increase in the thickness of nitride layers leads to the appearance of a texture in ZrN/Cu and CrN/Cu systems and the formation of an equilibrium ε-NbN phase in the layers of the NbN/Cu system. Tests for corrosion resistance in the environment of the formation of chloride ions showed that the coatings are anodic reaction. The best corrosion properties were obtained for coatings with the smallest layer thickness (about 8…10 nm).

Influence of Technological Parameters of Deposition on Physical and Mechanical Properties of Vacuum-Arc Multilayer Nitride Coatings Based on Chromium and Niobium

“…Nitrides of transition metal of IV group (Ti, Zr, Hf) [15][16][17], V group (V, Nb, Ta) [18][19][20] and VI group (Cr, Mo, W) [21][22][23] are mainly used as components of a multilayer system. For example, chromium nitride has good wear and corrosion resistance, high temperature stability, and a lower friction coefficient than titanium nitride [24].…”