Microstructure, Wear Resistance and Corrosion Resistance of CrN Coating with Platinum-Iridium Co-Doping

Abstract

A novel Pt-Ir co-doping strategy was devised to enhance the corrosion resistance of CrN coating. The deposited CrN coating exhibits a coherent growth pattern, resulting in significant mechanical strength and large grain sizes. However, during the corrosion process, corrosive fluids infiltrate through growth defects, leading to inadequate corrosion resistance of the coating. By incorporating Pt-Ir atoms as dopants, coherent grain growth is effectively hindered, yielding a uniformly smooth surface. Simultaneously, localized non-coherent lattice growth occurs due to co-doping in the coatings, impacting the mechanical properties of CrN-PtIr coatings and causing multidirectional fracture. Nevertheless, this dense coating surface impedes the penetration of corrosive fluids and enhances the corrosion resistance of the coating to some extent.

The Use of PVD Coatings for Anti-Wear Protection of the Press-In Connection Elements

“…CrN coatings are distinguished by very good resistance to abrasion, corrosion, and oxidation. They also have good sliding properties and a low coefficient of friction against a steel surface [21][22][23][24]. Those coatings are most often used for coating non-ferrous metal Coatings 2024, 14, 432 3 of 14 processing tools, as well as die shearing, stamping, and moulding tools and those at risk of quicker abrasive wear and corrosion.…”