Peculiarities of electrophoretic deposition and morphology  of deposited films in non-aqueous suspensions of Al 2 O 3 –Al nanopowder

Elena G. Kalinina; Darya S. Rusakova; Elena Yu. Pikalova

doi:10.15826/chimtech.2022.9.2.07

Peculiarities of electrophoretic deposition and morphology of deposited films in non-aqueous suspensions of Al₂O₃–Al nanopowder

Elena G. Kalinina, Darya S. Rusakova, Elena Yu. Pikalova

Abstract

The paper presents the results of a comprehensive study of the electrokinetic properties of non-aqueous suspensions of the Al₂O₃–Al nanopowder obtained by the method of electric explosion of wires (EEW) with 0.3 wt.% of metallic aluminum in its composition. The dependence of zeta potential on the concentration of the Al₂O₃–Al suspension is revealed. The nature of long-term changes in zeta potential and pH in suspensions is established. Appearance of bubbles in the deposited coatings due to the interaction of metallic aluminum particles with the liquid suspension medium during electrochemical reactions on the electrodes is defined as the main feature of the electrophoretic deposition (EPD) process in the Al₂O₃–Al suspensions. The influence of the suspension preparation method on the deposited coatings’ morphology is demonstrated.

Keywords

electrophoretic deposition; electric explosion of wire; alumina weakly aggregated nanopowder; non-aqueous suspension; zeta potential

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DOI: https://doi.org/10.15826/chimtech.2022.9.2.07

Copyright (c) 2022 Elena G. Kalinina, Darya S. Rusakova, Elena Yu. Pikalova

This work is licensed under a Creative Commons Attribution 4.0 International License.

Chimica Techno Acta, 2014-2024
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