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

Serdechnova, Maria; Höche, Daniel; Kuznetsov, Boris; Blawert, Carsten; Mohedano, Marta; Bouali, Anissa; Karpushenkov, Sergey; Zheludkevich, Mikhail

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.

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Serdechnova, Maria / Höche, Daniel / Kuznetsov, Boris / et al: Role of Phase Composition of PEO Coatings on AA2024 for In-Situ LDH Growth. 2017. MDPI AG.

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