Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders

The electrophoretic deposition (EPD) of coatings and bulk compacts in a wide range of thicknesses (from 23 to 1800 μm) from stable suspensions of a magnesium-doped aluminum oxide nanopowder with subsequent sintering of samples into dense ceramics was studied. The initial nanopowder was obtained by t...

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Autores principales:	E. G. Kalinina, D. S. Rusakova, E. Yu. Pikalova
Formato:	article
Lenguaje:	EN RU
Publicado:	Uralʹskij federalʹnyj universitet imeni pervogo Prezidenta Rossii B.N. Elʹcina 2021
Materias:	aluminum oxide nanopowder stable suspension zeta potential electrophoretic deposition bulk compacts Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/f549847c905343d7b192594efbe9be74
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spelling	oai:doaj.org-article:f549847c905343d7b192594efbe9be742021-12-01T05:53:11ZElectrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders2411-141410.15826/chimtech.2021.8.2.06https://doaj.org/article/f549847c905343d7b192594efbe9be742021-05-01T00:00:00Zhttps://journals.urfu.ru/index.php/chimtech/article/view/5072https://doaj.org/toc/2411-1414The electrophoretic deposition (EPD) of coatings and bulk compacts in a wide range of thicknesses (from 23 to 1800 μm) from stable suspensions of a magnesium-doped aluminum oxide nanopowder with subsequent sintering of samples into dense ceramics was studied. The initial nanopowder was obtained by the method of electric explosion of an Al-Mg alloy wire with a Mg content of 1.3 wt. %. The study of the dispersion composition, kinetics of deaggregation under the ultrasonic treatment and zeta potential in the nanopowder-based suspensions was carried out. It was shown that a nearly linear increase in the deposited mass and thickness of EPD deposits occurred at a constant voltage of 20 V and an average deposition current of approximately 40 μA when the deposition time was varied from 1 to 180 min. Drying of the coatings with a thickness of less than 35 μm led to the formation of a net of small cracks, while drying of the bulk compacts with a thickness of more than 1 mm occurred without cracking. The ceramic bulk sample with a thickness of 1.2 mm and the density of 98.7% TD was successfully obtained by sintering at 1650 °C for 4 h. It was characterized by a dense grain structure with an average grain size of 5 μm and the presence of a small number of closed pores less than 1 μm in size. Sintering of ceramics was revealed to be accompanied by the formation of a MgAl2O4 crystalline spinel phase, localized mainly at grain boundaries.E. G. KalininaD. S. RusakovaE. Yu. PikalovaUralʹskij federalʹnyj universitet imeni pervogo Prezidenta Rossii B.N. Elʹcina articlealuminum oxidenanopowderstable suspensionzeta potentialelectrophoretic depositionbulk compactsChemistryQD1-999ENRUChimica Techno Acta, Vol 8, Iss 2 (2021)
institution	DOAJ
collection	DOAJ
language	EN RU
topic	aluminum oxide nanopowder stable suspension zeta potential electrophoretic deposition bulk compacts Chemistry QD1-999
spellingShingle	aluminum oxide nanopowder stable suspension zeta potential electrophoretic deposition bulk compacts Chemistry QD1-999 E. G. Kalinina D. S. Rusakova E. Yu. Pikalova Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
description	The electrophoretic deposition (EPD) of coatings and bulk compacts in a wide range of thicknesses (from 23 to 1800 μm) from stable suspensions of a magnesium-doped aluminum oxide nanopowder with subsequent sintering of samples into dense ceramics was studied. The initial nanopowder was obtained by the method of electric explosion of an Al-Mg alloy wire with a Mg content of 1.3 wt. %. The study of the dispersion composition, kinetics of deaggregation under the ultrasonic treatment and zeta potential in the nanopowder-based suspensions was carried out. It was shown that a nearly linear increase in the deposited mass and thickness of EPD deposits occurred at a constant voltage of 20 V and an average deposition current of approximately 40 μA when the deposition time was varied from 1 to 180 min. Drying of the coatings with a thickness of less than 35 μm led to the formation of a net of small cracks, while drying of the bulk compacts with a thickness of more than 1 mm occurred without cracking. The ceramic bulk sample with a thickness of 1.2 mm and the density of 98.7% TD was successfully obtained by sintering at 1650 °C for 4 h. It was characterized by a dense grain structure with an average grain size of 5 μm and the presence of a small number of closed pores less than 1 μm in size. Sintering of ceramics was revealed to be accompanied by the formation of a MgAl2O4 crystalline spinel phase, localized mainly at grain boundaries.
format	article
author	E. G. Kalinina D. S. Rusakova E. Yu. Pikalova
author_facet	E. G. Kalinina D. S. Rusakova E. Yu. Pikalova
author_sort	E. G. Kalinina
title	Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
title_short	Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
title_full	Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
title_fullStr	Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
title_full_unstemmed	Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
title_sort	electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
publisher	Uralʹskij federalʹnyj universitet imeni pervogo Prezidenta Rossii B.N. Elʹcina
publishDate	2021
url	https://doaj.org/article/f549847c905343d7b192594efbe9be74
work_keys_str_mv	AT egkalinina electrophoreticdepositionofcoatingsandbulkcompactsusingmagnesiumdopedaluminumoxidenanopowders AT dsrusakova electrophoreticdepositionofcoatingsandbulkcompactsusingmagnesiumdopedaluminumoxidenanopowders AT eyupikalova electrophoreticdepositionofcoatingsandbulkcompactsusingmagnesiumdopedaluminumoxidenanopowders
_version_	1718405516759138304

Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders

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