Correlation between nanoindentation response and wear characteristics of CrN‐based coatings deposited by an Arc‐PVD method

Abstract

The examination of the existing relationships between nanoindentation responses and tribological properties of the nanostructured CrN, Cr(CN), and (CrTi)N coatings was the matters to be considered in this research. A cathodic arc physical vapor deposition machine was therefore implemented to apply the chosen coatings on the DIN 1.2510 tool steel substrate. Moreover, an X‐ray diffraction and a field emission scanning electron microscope were utilized in order to show the features regarding microstructure and morphology of these very coatings. The mechanical and tribological behavior of the coatings was expected to be assessed with the use of a nanoindentation and pin‐on‐disc wear tests. According to the obtained result, the wear resistance and hardness value of the (CrTi)N coating were proved to be much better than those of the CrN and Cr(CN). Linear equations were proposed between wear rate/hardness and friction coefficient/hardness to evaluate the correlation between mechanical and tribological properties. The presence of a quadratic equation between the friction coefficient and the plastic deformation index was also discovered.

A comprehensive review of modern engineered ceramics coatings for optimised resistance to wear and corrosion

“…To improve these ceramic coatings, the optimisation hierarchy is as typically follows: (1) hardness, (2) adhesion strength, (3) lubricity, (4) toughness, (5) corrosion resistance and (6) thermal stability. First and foremost, a hard coating is an absolute necessity to provide wear resistance, because a greater resistance to plastic deformation means less deformation-induced mechanical damage to the coating and generally correlates to lower specific wear rates under identical tribological conditions [33]. Although hardness is a relative quantity that is sensitive to many microstructural effects and extrinsic conditions, the elastoplastic deformation measured with indentation techniques is fundamentally linked with the intrinsic elastic constants of the constituent ceramic crystals.…”

The post‐annealing effect on tribological and corrosion behaviors of CrN/AlCrN multilayered coating applied by CAE‐PVD

“…Developing coatings with multilayered architecture is one solution to thermodynamically stabilize semi‐stable structures 7–9 . In recent years, multilayered coatings consisting of two different types of transition nitride layers have become popular, and it has been discovered that these multilayered coatings have superior mechanical and chemical properties such as corrosion resistance, excellent hardness, good wear resistance, and adhesion compared to single‐layered coatings 8,10 . In general, the interaction of the dislocations with the interface between the layers is influenced by the sequencing of two different materials 11 .…”

“…[7][8][9] In recent years, multilayered coatings consisting of two different types of transition nitride layers have become popular, and it has been discovered that these multilayered coatings have superior mechanical and chemical properties such as corrosion resistance, excellent hardness, good wear resistance, and adhesion compared to single-layered coatings. 8,10 In general, the interaction of the dislocations with the interface between the layers is influenced by the sequencing of two different materials. 11 The strength and hardness of a multilayered structure are enhanced by the existence of a high number of the borders between the individual layers.…”