Composite Materials with Nanoscale Multilayer Architecture Based on Cathodic-Arc Evaporated WN/NbN Coatings
Smyrnova K. Sahul M. Haršáni M. Beresnev V. Truchlý M. Čaplovič L. Čaplovičová M. Kusý M. Kozak A. Flock D. Kassymbaev A. Pogrebnjak A.
2023American Chemical Society
ACS Omega
2023
Hard nitride coatings are commonly employed to protect components subjected to friction, whereby such coatings should possess excellent tribomechanical properties in order to endure high stresses and temperatures. In this study, WN/NbN coatings are synthesized by using the cathodic-arc evaporation (CA-PVD) technique at various negative bias voltages in the 50-200 V range. The phase composition, microstructural features, and tribomechanical properties of the multilayers are comprehensively studied. Fabricated coatings have a complex structure of three nanocrystalline phases: β-W2N, δ-NbN, and ϵ-NbN. They demonstrate a tendency for (111)-oriented grains to overgrow (200)-oriented grains with increasing coating thickness. All of the data show that a decrease in the fraction of ϵ-NbN phase and formation of the (111)-textured grains positively impact mechanical properties and wear behavior. Investigation of the room-temperature tribological properties reveals that with an increase in bias voltage from −50 to −200 V, the wear mechanisms change as follows: oxidative → fatigue and oxidative → adhesive and oxidative. Furthermore, WN/NbN coatings demonstrate a high hardness of 33.6-36.6 GPa and a low specific wear rate of (1.9-4.1) × 10-6 mm3/Nm. These results indicate that synthesized multilayers hold promise for tribological applications as wear-resistant coatings.
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Institute of Materials Science, Slovak University of Technology in Bratislava, J. Bottu St. 25, Trnava, 917 24, Slovakia
Biomedical Research Centre, Sumy State University, Rymskogo-Korsakova St. 2, Sumy, 40007, Ukraine
Research and Development Department, Staton, s.r.o., Sadová 1148, Turany, 038 53, Slovakia
Department of Reactor Engineering Materials and Physical Technologies, V.N. Karazin Kharkiv National University, Svobody Sq. 4, Kharkiv, 61022, Ukraine
Department of Experimental Physics, Comenius University in Bratislava, Mlynská dolina F2, Bratislava, 842 48, Slovakia
Centre for Nanodiagnostics of Materials, Slovak University of Technology in Bratislava, Vazovova 5, Bratislava, 812 43, Slovakia
Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská Cesta 9, Bratislava, 841 04, Slovakia
Institute of Materials Science and Engineering, Ilmenau University of Technology, Gustav-Kirchhoff Str. 1, Ilmenau, 98693, Germany
Center of Advanced Development “VERITAS”, D. Serikbayev East Kazakhstan State Technical University, Protozanova St. 69, Ust-Kamenogorsk, 070004, Kazakhstan
Institute of Materials Science
Biomedical Research Centre
Research and Development Department
Department of Reactor Engineering Materials and Physical Technologies
Department of Experimental Physics
Centre for Nanodiagnostics of Materials
Institute of Electrical Engineering
Institute of Materials Science and Engineering
Center of Advanced Development “VERITAS”
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