The Effect of Al and Ti Transition Metals on the Wear Resistance of Ceramic Based CrN Coatings; Investigation under Ambient Air and Vacuum Conditions

Abstract

In the present study, CrN, CrAlN and CrAlTiN coatings were deposited using the cathodic arc evaporation technique. The structural investigations of these CrN based coatings were performed by scanning electron microscopy, energy dispersive spectroscopy, atomic force microscopy, X-ray diffractometer. The hardness and adhesion strength values of coatings were determined via Vickers type microhardness tester and progressive load scratch tester, respectively. The wear performance of samples was established at ambient air and vacuum condition. All coatings grew in the “T zone” growth model and had a dense and columnar structure. The XRD patterns presented predominantly (220), (110), and (111) reflections. It was demonstrated that the quaternary coating had a higher texture parameter as 0.68, which was related to the highest thickness and hardness. Also, CrAlTiN coatings with the smallest mean crystallite size of ∼87 nm showed the best hardness, and this ensured relatively high scratch resistance. CrN and CrAlTiN coatings improved wear performance under ambient air condition but were not striking as under vacuum condition. The quaternary coating had a superior performance in the vacuum condition, but due to the high sensitivity of Ti to oxygen, it fell behind the CrN coating under ambient air condition.

The effect of friction stir process on the mechanical, tribological, and biocompatibility properties of AZ31B magnesium alloy as a biomaterial: A pilot study

“…The wear mechanism of the base material in ambient air is the consist of larger scratches, wrinkles, and delamination which indicated the adhesive wear characteristics (Figure 11(a)). 51 The scratches on the surface are formed as a result of the wear particles getting stuck between the mating surfaces due to the breaking of the micro weld connections formed in the said adhesive characteristic. 52 It is observed that the worn surface of the base material in SBF solution (Figure 11(b)) has smoother and shallower scratches compared to the ambient air.…”

Effects of Al, Ti, and Cr content with different interlayer configurations on tribological behavior of AlCrN and AlTiN multilayer coatings

“…The reason for this is that good adhesion properties between the coating and the substrate prevent coating spalling or buckling at shear stress formed during sliding friction. [20][21][22][23] The interlayer arrangement and number of layers have a significant impact on strength and friction behavior on multi-layer coatings. It was reported that adding Al to TiN and CrN increases the coating's mechanical properties, corrosion resistance, wear resistance, and melting point by increasing bond strength, lattice strain, and room temperature hardness.…”

The use of a superhard boron nitride composite c-BN+h-BN with increased resistance to brittle cracking for anti-wear coatings

“…The analysis of the literature shows that coatings made of composite materials are more often used due to the fact that they often have better properties (antiabrasion, 11,12 tribological, 13,14 anticorrosion, 15,16 etc.) than coatings made of simple materials (made of one element or one single-phase two-component compound—e.g.…”