Tribological characteristics of (TiZrHfVNbTa)N coatings applied using the vacuum arc deposition method

Abstract

Abstract-The effect of the pressure of the nitrogen atmosphere during the formation of vacuum arc nitride coatings based on high entropy alloys of the Ti-Zr-Hf-V-Nb-Ta system on their structure, hardness, and tribotechnical characteristics is considered. It is shown that strong nitride forming components lead to the dependence of the structural state and properties on the pressure of the nitrogen atmosphere during coating deposition. Deposition at a nitrogen pressure of 0.4 Pa results in the formation of a texture with the [111] axis when the applied bias potential is -70 V and when the bias potential is equal to -150 V the textural structure is biaxial ([111] and [110]) textures and high value of hardness of 51 GPa Along with that the highest value of wear resistance (under oxidizing mechanical wear) is inherent to coatings formed under the pressure of nitro gen of 0.09 Pa. The strongest microdeformation of coating crystallites corresponds to this pressure.

Arc-Evaporated Nanoscale Multilayer Nitride-Based Coatings for Protection Against Wear, Corrosion, and Oxidation

“…This is related to the high values of the coefficient of friction during the tests with Al 2 O 3 counterbody, which include high entropy nitride (TiZrHfVNbTa)N [14].…”

“…Such material characteristics as hardness, elasticity, adhesive and cohesive strength, durability, thermal and chemical stability and others are particularly important in this regard [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Effect of the deposition parameters on the phase–structure state, hardness, and tribological characteristics of Mo2N/CrN vacuum–arc multilayer coatings

“…With increasing modulus of the bias voltage, U b , at which due to the atomic peening the material compac tion takes place [2], the increase of the critical loads is observed. The comparative analysis of condensates obtained at high pressure indicates that in scratching coatings wear, but do not flake, i.e., they fracture by the cohesion mechanism, caused by the plastic deformation and formation of fatigue cracks in the coating mate rial [16].…”

A study of initial stages for formation of carbon condensates on copper

“…In recent years, structural engineering at the nanoscale is the most used method for obtaining materials with specified characteristics [1,2]. The materials thus obtained have high functional properties [3,4] and can have an unusual structural state [5] or form supersaturated solid solutions [6]. In the decay of such supersaturated solid solutions, a nanostructured state with a fractal dimension of the constituent elements can be formed [7].…”