Structure and Properties of Nanostructured (Ti‐Hf‐Zr‐V‐Nb)N Coatings

Abstract

Nanostructured coatings of (Ti-Zr-Hf-V-Nb)N were obtained by the Cathodic Arc Vapor Deposition (CAVD) method. To investigate these coatings, a number of complementary methods of elemental and structural analysis were used, namely, slow positron beam (SPB), proton microbeam (μ-PIXE), micro- and nanoelectron beam (EDS and SEM analyses), and X-ray diffraction method (XRD), including method of “α-sin2φ” measurement of a stress-strain state (X-ray strain measurement). Additionally, the texture of coatings before and after annealing up to 873 K (for time of annealingτ=30 min) was also investigated. It was shown that increasing of stress-strain state in the coating during deposition increases the resistance to oxidation at high temperatures of annealing. It was also found that the redistribution of elements and defects, as well as their alignment (segregation), appeared due to thermally stimulated diffusion. It is also connected with the process of spinodal segregation near grain boundaries and interfaces around the grains and subgrains.

The influence of nitrogen pressure on the fabrication of the two-phase superhard nanocomposite (TiZrNbAlYCr)N coatings

“…The nitrides and carbides from HEAs significantly improve the characteristics of materials: radiation, wear, and corrosion resistance. Many different HEAs have been fabricated and investigated; however, the coatings based on such alloys do not always possess excellent physicalmechanical properties [6][7][8][9]. Fabrication of nitride coatings from high-entropy alloys with high hardness, oxidation resistance, and thermal stability is an issue of current interest.…”

Structure and properties of (Zr-Ti-Cr-Nb)N multielement superhard coatings

“…One of the reasons for such a softness of the material is probably a high nitrogen concentration (about 47 at % at a flow of 8 cm 3 /min). However, this interpretation of the results leaves something to be discussed, as the nitrogen concentration is sufficient for the formation of a harder material [8,[22][23][24][25][26][27]. A complex of physical and mechanical properties of pure metals like zirconium, niobium, titanium, molybdenum, and chromium, allows us to assume that the investigation of vacuumplasma condensates based on the Zr-Ti-Cr-Nb system is advisable.…”

Research of mechanical and cutting properties, wear and failure mechanisms of nano-structured multilayered composite coating Ti-TiN-(NbZrAl)N

“…Out of various types of wear-resistant coatings, developed and implemented in recent years, multilayered composite coatingswith gradient structure, as well as multi-component coatings should be noted [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

“…A series of studies have tested the properties of multicomponent nano-structured coatings [9][10][11][12]. Braic et al [9,10] studied the properties of nitride system (TiZrNbHfTa)N, which composition, in addition to Zr, Nb and Ti, also includes Hf and Ta.…”

“…Braic et al [9,10] studied the properties of nitride system (TiZrNbHfTa)N, which composition, in addition to Zr, Nb and Ti, also includes Hf and Ta. Pogrebnjak et al [11] and Blinkov et al [12] considered the study of the properties of multi-composite coatings on the basis of nitride systems (TiHfZrVNb)N, which composition also includes Hf and V, as well as systems (TiAlCrZrNb)N and (TiAlCrZrNb)N, which composition is modified through introduction of Al and Cr. It should be noted that the above studies were focused only on coatings with mono-layered architecture, including coatings with nano-scale structure.…”