Structural Engineering Multiperiod Coating ZrN/MoN

Abstract

Using the method of structural engineering by changing the thickness of the layers in a multiperiod ZrN/MoN system investigated the effect of the phase-texture state of the crystallites and their size on the hardness of the vacuum-arc coating. Is revealed a determining influence on the formation of ZrN layers preferential orientation growth [100] axis with a small layer thickness 7-20 nm (the deposition of 3 to 10 seconds). At high layer thickness determines the texture [311] crystallites are -Mo2N phase formed in the Mo-N layers. Pulsed high-voltage stimulation without changing the type of structural states for different layer thicknesses, leads to partial disorientation texture in thick layers. Hardness of coating with thick (80 nm) layers is 35-37 GPa. In small thickness layers pulse stimulation of atoms motility causes the formation of a planar structure with an average crystallite size of 4-9 nm in the layers, which is accompanied by increased hardness of up to 44 GPa.

Structure and Physics Mechanical Properties of Multiperiod Vacuum-arc Coatings on the Basis of Two-layer System TiNx/ZrNx

“…Low value of the friction coefficient is observed for compositional multilayer coatings TiNx/ZrNx (f  0.1-0.14). Despite the fact that the hardness of these coatings are not highest among the investigated compositional pairs [21,22].…”

“…At larger Ub  -200 V and small thicknesses of ZrNx layers (large n) -they strongly micro-strained (high density of disordered dislocations). This may be associated with superficial ion bombardment of growing layers ZrNx by heavy ions Zr [21]. Herewith relaxation of deformation is diffi- In Figure 4 are showing data of hardness (H) and elasticity modulus (E) of multilayer coatings TiNx/ZrNx depending upon the number layers for two potentials of bias.…”

“…Availability of own base of zirconium in Ukraine, its high physical and mechanical properties and great use in atomic energy open wide prospects for its industrial application in the form of vacuum-arc coatings. Particularly high properties demonstrate multiperiod compositional coatings on the basis of zirconium nitride: ZrN/MoN [21], ZrN/CrN [22,23] ZrN/TiN [24].…”

Influence of the thermal factor on the composition of electron­beam high­entropy ALTiVCrNbMo coatings

“…Owing to structural engineering, it became possible to create new types of materials. Such materials include pseudo-alloys [3], nanoperiodic composites based on various transient metals [4,5], solid solutions, oversaturated as a result of ion implantation, based on metals [6] or phases of implantation [7]. It becomes possible to stabilize metastable structural states by selecting conditions for the formation of materials [8].…”

A study of the effect of deposition conditions on the phase-structural state of ion-plasma WC – TiC coatings

“…ness [21,22]. Common to these approaches is that the basis for achieving high physical and mechanical characteristics is largely determined by the properties of the interphase boundary (grain adhesion [23], elastic characteristics [24], the ability to relax stresses [6], block crack propagation [25], etc.…”