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


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Abstract

Multilayer nanostructured coatings consisting of alternating MoN and CrN layers were obtained by vacuum cathode evaporation under various conditions of deposition. The transition from micron sizes of bilayers to the nanometer scale in the coatings under investigation leads to an increase in hardness from 15 to 35.5 GPa (with a layer thickness of about 35 nm). At the same time, when the number of bilayers in the coating decreases, the average Vickers hardness increases from 1267 HV0.05 to 3307 HV0.05. An increase in the value of the potential supplied to the substrate from–20 to–150 V leads to the formation of growth textures in coating layers with the [100] axis, and to an increase in the intensity of reflections with increasing bilayer thickness. Elemental analysis carried out with the help of Rutherford backscattering, secondary ion mass spectrometry and energy dispersion spectra showed a good separation of the MoN and CrN layers near the surface of the coatings.

About the authors

A. D. Pogrebnyak

Sumy State University

Author for correspondence.
Email: alexp@i.ua
Ukraine, Sumy

O. V. Bondar

Sumy State University; NanoBioMedical Centre

Email: alexp@i.ua
Ukraine, Sumy; Poznan

B. Zhollybekov

Berdakhay Karakalpak State University

Email: alexp@i.ua
Uzbekistan, Nukus

S. Konstantinov

Belarusian State University

Email: alexp@i.ua
Belarus, Minsk

P. Konarski

Tele and Radio Research Institute

Email: alexp@i.ua
Poland, Warsaw

V. M. Beresnev

Karazin Kharkiv National University

Email: alexp@i.ua
Ukraine, Kharkiv

A. I. Kupchishin

Abai Kazakh National Pedagogical University

Email: alexp@i.ua
Kazakhstan, Almaty

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