Multicomponent (Ti-Zr-Hf-V-Nb)N Nanostructure Coatings Fabrication, High Hardness and Wear Resistance

Abstract

First results in the eld of synthesis and research of the multicomponent (TiZrHfVNb)N nanostructured coatings are presented in the paper. Inuence of processes of spinodal segregation and mass-transfer on single--layered or multilayered crystal boundary (second phase) forming were explored. Superhard nanostructured coatings were investigated before and after annealing at the temperature 600• C using unique methods (slow positron beam, proton microbeam particle induced X-ray emission-µ, Rutherford backscattering-analysis, scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diraction analysis was performed using DRON-4 and nanoindentor). Diraction spectra were taken point-by-point, with a scanning step 2Θ = 0.05 to 0.1• . We detected that positron trapping by defects was observed on the nanograins boundaries and interfaces (vacancies and nanopores which are the part of triple and larger grain's boundary junction). The 3D distribution maps of elements obtained by the proton microbeam (particle induced X-ray emission-µ) together with the results obtained by slow positron microbeam gave us comprehensive information about physical basis of the processes, connected with diusion and spinodal segregation in superhard coatings.

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

“…ing by light atoms. The main reason of this is selective spraying of light atoms during the spraying from the surface of growth [12]. To the largest extent it affects nitrogen atoms, the content of which in the coating with the increase of U b , in the studied rage decreases more than 1.5 times (see Fig.…”

“…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].…”

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.…”

Thin-Film Deposition With Refractory Materials Using a Vacuum Arc

“…Pogrebnjak et al [14] fabricated new nanocomposite (Ti-Zr-Hf-V-Nb)N coatings using vacuum arc deposition. Thus, while refractory metal films were deposited by several methods, they have not yet been deposited from a vacuum arc with a refractory anode.…”