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Title | Effect of Bilayer Thickness and Bias Potential on the Structure and Properties of (TiZr/Nb)N Multilayer Coatings as a Result |
Authors |
Rakhadilov, B.
Pohrebniak, Oleksandr Dmytrovych ![]() Sagdoldina, Z. Buitkenov, D. Beresnev, V. Mukhamedova, A. |
ORCID |
http://orcid.org/0000-0002-9218-6492 |
Keywords |
multilayer coating Arc-PVD (TiZr/Nb)N phase wear resistance hardness |
Type | Article |
Date of Issue | 2022 |
URI | https://essuir.sumdu.edu.ua/handle/123456789/98627 |
Publisher | MDPI |
License | Creative Commons Attribution 4.0 International License |
Citation | Rakhadilov B.; Pogrebnjak A.; Sagdoldina Z.; Buitkenov D.; Beresnev V.; Mukhamedova A. Effect of Bilayer Thickness and Bias Potential on the Structure and Properties of (TiZr/Nb)N Multilayer Coatings as a Result of Arc-PVD Deposition. Materials 2022, 15, 7696. https://doi.org/10.3390/ma15217696. |
Abstract |
This work is devoted to the study of the formation of nanostructured multilayer coatings
(TiZr/Nb)N on the surface of an AISI 321 steel substrate depending on the deposition parameters
of the Arc-PVD method. The results of the X-ray diffraction analysis showed the formation of solid
solution (TiNb)N and ZrN in the multilayer coatings with an FCC structure, "-NbN with a hexagonal
structure, as well as with a small volume fraction of the "-Ti2N and -Nb2N phase. On the basis of
phase composition data, it is possible to assume that an increase in the number of bilayers leads to a
decrease in the nitrogen concentration in the bilayers and, consequently, to a decrease in the volume
fraction of "-NbN and -Nb2N nitrides. In all investigated systems obtained at 100 V and 200 V
bias potentials, "-NbN is the main phase. The study of the element distribution over the thickness of
the (TiZr/Nb)N coating confirms the results of the X-ray diffraction analysis. The use of the structure
model in the form of alternating layers allows for significantly improving the adhesion characteristics
of the protective coating, as well as ensuring their high hardness. Based on the experimental results,
it is possible to analyze changes in the mechanical and tribological properties of multilayer coatings
depending on the number of applied bilayers. The results of the study of the elastic modulus and
hardness of multilayer coatings (TiZrNb)N with different numbers of bilayers showed that a large
number of bilayers (small thickness of each individual layer) shows the lowest value of hardness. It is
assumed that as the bilayer thickness decreases, the coating characteristics are closer to the monolayer
alloy than to the multilayer structure. |
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