Plasma electrolytic oxidation coatings with particle additions - A review
authors Lu, XP; Mohedano, M; Blawert, C; Matykina, E; Arrabal, R; Kainer, KU; Zheludkevich, ML
nationality International
journal SURFACE & COATINGS TECHNOLOGY
author keywords Plasma electrolytic oxidation; Particles; Light metals
keywords MICRO-ARC OXIDATION; AZ91D MAGNESIUM ALLOY; SOL-GEL COATINGS; CORROSION-RESISTANCE; ELECTROPHORETIC DEPOSITION; OXIDE COATINGS; SILICA SOL; CERAMIC COATINGS; ALUMINUM-ALLOY; MG ALLOY
abstract Plasma electrolytic oxidation (PEO) processing for light metals is known for decades and has been established as a well-known industrial surface treatment offering a reasonable wear and corrosion protection. However, long-term protection is compromised by the intrinsic porosity and limited range of composition in the PEO layer. A novel approach is to introduce particles to the electrolyte, aiming at their in-situ incorporation into PEO coatings during growth. The idea is that with the help of particles the defects can be sealed, and the composition range and the functionalities of produced coatings can be enhanced. So far, multifunctional coatings with anticorrosion, self lubrication, anti-wear, bioactive and photocatalytic properties were produced with the aid of particle addition. The properties of particle itself, together with electrical and electrolyte parameters during PEO processing determine the way and efficiency of particle uptake and incorporation into the coatings. Normally incorporation of the particles into the coating can range from fully inert to fully reactive. This paper reviews recent progress on particle-containing PEO coatings formed on Mg, Al and Ti alloy substrates. The main focus is given to the uptake mechanism of particle into PEO layers and the introduced microstructural and functional changes. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0257-8972
year published 2016
volume 307
beginning page 1165
ending page 1182
digital object identifier (doi) 10.1016/j.surfcoat.2016.08.055
web of science category Materials Science, Coatings & Films; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000389732000002
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journal impact factor 3.784
5 year journal impact factor 3.754
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