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Coatings 2017, 7(11), 190; https://doi.org/10.3390/coatings7110190

Role of Phase Composition of PEO Coatings on AA2024 for In-Situ LDH Growth

1
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
2
Departamento de Ciencia de Materiales, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
3
Faculty of Chemistry, Belarusian State University, Minsk 220030, Belarus
4
Faculty of Engineering, Kiel University, Kaiserstraße 2, 24143 Kiel, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Lavacchi
Received: 14 October 2017 / Revised: 30 October 2017 / Accepted: 1 November 2017 / Published: 6 November 2017
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Abstract

Plasma electrolytic oxidation (PEO) is an environmentally friendly anodizing technique leading to the formation of a ceramic-like coatings under high-voltage discharges. Layered double hydroxides (LDHs) were grown directly on γ, α, and amorphous Al2O3 powders, respectively, in order to investigate the phase responsible for in-situ LDH growth on PEO coating. Furthermore, it is shown that LDH growth is limited by the high tortuosity of the PEO layer and the accessibility of Al ( OH ) 4 anions from the substrate covered with thin amorphous aluminum oxide, through the pores. View Full-Text
Keywords: layered double hydroxides; plasma electrolytic oxidation; aluminum alloy layered double hydroxides; plasma electrolytic oxidation; aluminum alloy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Serdechnova, M.; Mohedano, M.; Bouali, A.C.; Höche, D.; Kuznetsov, B.; Karpushenkov, S.; Blawert, C.; Zheludkevich, M.L. Role of Phase Composition of PEO Coatings on AA2024 for In-Situ LDH Growth. Coatings 2017, 7, 190.

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