Structural Engineering of the Multilayer Vacuum Arc Nitride Coatings Based on Ti, Cr, Mo and Zr

Abstract

The possibilities of structural engineering of multi-period vacuum-arc coatings based on nitrides of transition metals Ti, Cr, Mo, and Zr have been investigated by structural studies (X-ray diffraction and electron microscopy) in combination with measurement of hardness by indentation. The formation of phases with a cubic crystal lattice under nonequilibrium conditions under vacuum arc method of production. The supply of a negative bias potential of-200V in mononitrides leads to the predominant formation of texture of crystallites with the [111] axis. The introduction of thin (about 10 nm) metal layers leads to a decrease in texture perfection [111] and texture formation [100]. This effect is associated with a change in the stress-strain state of nitride layers. It is determined that the composite multiperiod coatings (Me1N/Me2N)/(Me1/Me2) have a greater hardness and greater resistance compared to MeN/Me. For a multiperiod system with damping metal layers-(ZrN/CrN)/(Zr/Cr), superhard coatings with a hardness of 46 GPa were obtained.

A study of the phase-structural engineering possibilities of coatings on D16 alloy during micro-arc oxidation in electrolytes of different types

“…The most promising directions in the field of creating multifunctional coatings are multi-element [3,4], multilayer [5,6] and hybrid (formed from a base material with a partial thickness increment [7,8]) coatings. In recent years, the method of structural engineering of coatings has been effectively used to form coatings with desired properties [9,10].…”

Determination of regularities of the influence of the elemental composition of niobium­based alloys on their structure and properties

“…To achieve high functional properties, the main trend in engineering materials science is to obtain materials in conditions far from equilibrium [1,2]. Moreover, such materials may include a large number of elements (multi-element approach) [3,4].…”

Determination of influence of electrolyte composition and impurities on the content of -AL2O3 phase in MАO-coatings on aluminum

“…To increase the stability of such metastable states, two approaches are used: doping to low concentrations (up to 1 at %) [9,10] and multi-element doping in a ratio of elements close to equiatomic [11,12]. Moreover, the highest mechanical properties were achieved by obtaining plasma flows on the surface of coatings [13,14].…”