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Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings

This paper presents the results of studies on AlMgB(14)-based ceramic coatings deposited on WC-Co hard alloy substrates using RF plasma sputtering. The aim of this work is to study the structure, phase composition, and mechanical properties of AlMgB(14)-based coatings depending on the sputtering mod...

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Autores principales: Tkachev, Dmitrii, Zhukov, Ilya, Nikitin, Pavel, Sachkov, Victor, Vorozhtsov, Alexander
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220629/
https://www.ncbi.nlm.nih.gov/pubmed/37242006
http://dx.doi.org/10.3390/nano13101589
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author Tkachev, Dmitrii
Zhukov, Ilya
Nikitin, Pavel
Sachkov, Victor
Vorozhtsov, Alexander
author_facet Tkachev, Dmitrii
Zhukov, Ilya
Nikitin, Pavel
Sachkov, Victor
Vorozhtsov, Alexander
author_sort Tkachev, Dmitrii
collection PubMed
description This paper presents the results of studies on AlMgB(14)-based ceramic coatings deposited on WC-Co hard alloy substrates using RF plasma sputtering. The aim of this work is to study the structure, phase composition, and mechanical properties of AlMgB(14)-based coatings depending on the sputtering mode. According to the results of the microstructural study, the bias voltage applied to the substrate during the sputtering process significantly contributed to the formation of the coating morphology. Based on the results of compositional and structural studies by energy dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy, it was found that the coatings are composed of nanocrystalline B(12) icosahedrons distributed in an amorphous matrix consisting of Al, Mg, B, and O elements. The nanohardness of the coatings varied from 24 GPa to 37 GPa. The maximum value of the hardness together with the lowest coefficient of friction (COF) equal to 0.12 and wear resistance of 7.5 × 10(−5) mm(3)/N·m were obtained for the coating sputtered at a bias voltage of 100 V. Compared with the COF of the original hard alloy substrate, which is equal to 0.31, it can be concluded that the AlMgB(14)-based coatings could reduce the COF of WC-based hard alloys by more than two times. The hardness and tribological properties of the coatings obtained in this study are in good agreement with the properties of AlMgB(14)-based materials obtained by other methods reported in the literature.
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spelling pubmed-102206292023-05-28 Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings Tkachev, Dmitrii Zhukov, Ilya Nikitin, Pavel Sachkov, Victor Vorozhtsov, Alexander Nanomaterials (Basel) Article This paper presents the results of studies on AlMgB(14)-based ceramic coatings deposited on WC-Co hard alloy substrates using RF plasma sputtering. The aim of this work is to study the structure, phase composition, and mechanical properties of AlMgB(14)-based coatings depending on the sputtering mode. According to the results of the microstructural study, the bias voltage applied to the substrate during the sputtering process significantly contributed to the formation of the coating morphology. Based on the results of compositional and structural studies by energy dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy, it was found that the coatings are composed of nanocrystalline B(12) icosahedrons distributed in an amorphous matrix consisting of Al, Mg, B, and O elements. The nanohardness of the coatings varied from 24 GPa to 37 GPa. The maximum value of the hardness together with the lowest coefficient of friction (COF) equal to 0.12 and wear resistance of 7.5 × 10(−5) mm(3)/N·m were obtained for the coating sputtered at a bias voltage of 100 V. Compared with the COF of the original hard alloy substrate, which is equal to 0.31, it can be concluded that the AlMgB(14)-based coatings could reduce the COF of WC-based hard alloys by more than two times. The hardness and tribological properties of the coatings obtained in this study are in good agreement with the properties of AlMgB(14)-based materials obtained by other methods reported in the literature. MDPI 2023-05-09 /pmc/articles/PMC10220629/ /pubmed/37242006 http://dx.doi.org/10.3390/nano13101589 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tkachev, Dmitrii
Zhukov, Ilya
Nikitin, Pavel
Sachkov, Victor
Vorozhtsov, Alexander
Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings
title Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings
title_full Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings
title_fullStr Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings
title_full_unstemmed Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings
title_short Structure and Frictional Properties of Ultrahard AlMgB(14) Thin Coatings
title_sort structure and frictional properties of ultrahard almgb(14) thin coatings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220629/
https://www.ncbi.nlm.nih.gov/pubmed/37242006
http://dx.doi.org/10.3390/nano13101589
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