Structure and Properties of Multilayer Nanostructured Coatings TiN/MoN Depending on Deposition Conditions

Abstract

This work presents the results of TiN/MoN coatings studying. These multilayer nanostructured coatings demonstrate dependence on depositions conditions on nanometer level. The inuence of nanosized monolayer thickness on structure changing and properties of nanocomposite multilayer coatings TiN/MoN was found. Multilayer TiN/MoN coatings of the total thickness from 6.8 to 8.2 µm were obtained using C-PVD method. Thicknesses of monolayers were 2, 10, 20, 40 nm. The structure of samples was studied using X-ray diraction (Bruker D-8 Advance) in Cu Kα radiation, high resolution transmission electron microscopy with diraction CFEI EO Techai F200, scanning electron microscopy with energy dispersive X-ray spectroscopy (JEOL-7001F), and microhardness measurements in dependence on indenter load. Scratch tests (friction, wear, etc.) were also provided using Rockwell-C diamond indenter (CSM Revetest Instruments) with a tip radius of 200 µm. Friction and wear behavior were evaluated using ball-on-plate sliding test on a UMT-3MT tribometer (CETR, USA). With decreasing monolayer thickness the hardness value increases, and the size of nanograins reduces. The values obtained for the friction coecient of the multilayer system is much smaller than in nanostructured coatings of TiN (nc) or MoN (nc). Annealing showed formation of a (Ti,Mo)N solid solution and small growth of nanocrystals.

Investigation of Nanoscale TiN/MoN Multilayered Systems, Fabricated Using Arc Evaporation

“…The plasticity index, which is defined as the hardness (H) to elasticity modulus (E) ratio H/E [7][8][9][10], is also rather high and exceeds the value 0.06. It allows using such coatings as protective under the influence of different alternating loadings and abrasive wear [7,[16][17][18]. For the multilayered TiN/MoN system we found that the lowest value of L c3 critical loading was 42.5 N, and it corresponds to the periodic structure with the biggest period of 100 nm.…”

Study of dielectric function of (FeCoZr)x(CaF2)(100−x) nanocomposites produced with a beam of argon ions

“…Comparative analysis of the formulas for electric susceptibility (6) and for conductivity (7) indicates that the conductivity activation energy should be higher than the activation energy of electric susceptibility because:…”

Influence of the bilayer thickness of nanostructured multilayer MoN/CrN coating on its microstructure, hardness, and elemental composition

“…As one of the most promising multilayer systems, the systems based on refractory metal nitrides or carbides, such as MoN/CrN [22], have been recently examined, since these compositions achieve high hardness and wear resistance of coatings in combination with high resistance to oxidation and other impacts of aggressive environment [23].…”