Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
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| Автор |
Kalinina, E. G.
Rusakova, D. S. Pikalova, E. Yu. |
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| Тематика |
ALUMINUM OXIDE
NANOPOWDER STABLE SUSPENSION ZETA POTENTIAL ELECTROPHORETIC DEPOSITION |
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| Описание |
Received: 06.04.2021. Revised: 02.05.2021. Accepted: 03.05.2021. Available online: 07.05.2021.
The authors are grateful to D.Sc. prof. A.P. Safronov (Ural Federal University) for valuable advice during the preparation of the manuscript, to the head of the laboratory of impulse processes Dr. I.V. Beketov and junior researcher Mr. A.V. Bagazeev (IEP UB RAS) for the development of the method for producing nanopowders (EEW method), and to scientific researcher Dr. A.S. Farlenkov (Ural Federal University) for conducting electron microscopic studies. 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. The work was partially carried out using the equipment of the shared access centers of the Institute of Electrophysics (IEP UB RAS) and Institute of High Temperature Electrochemistry (IHTE UB RAS), Composition of compounds. |
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| Дата |
2021-08-09T12:13:46Z
2021-08-09T12:13:46Z 2021-07 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
Kalinina E. G. Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders / E. G. Kalinina, D. S. Rusakova, E. Yu. Pikalova // Chimica Techno Acta. — 2021. — Vol. 8, No. 2. — № 20218206.
2411-1414 http://elar.urfu.ru/handle/10995/100705 https://www.elibrary.ru/item.asp?id=46407568 10.15826/chimtech.2021.8.2.06 |
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| Язык |
en
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| Связанные ресурсы |
Chimica Techno Acta. 2021. Vol. 8. № 2
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| Формат |
application/pdf
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| Издатель |
Ural Federal University
Уральский федеральный университет |
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