Abstract
Ceramic-like coatings were formed on zirconium-niobium (Nb – 1%) alloy by microarc oxidation (MAO) in slurry electrolyte with the addition of submicron yttria powder. The coatings were investigated using scanning electron microscopy, x-ray diffraction analysis, microhardness tester and roughness meter. The addition of submicron yttria powder in electrolyte leads to content reduction of zirconia monoclinic phase in MAO coating. The inhibition effect increases with the MAO coating thickness rise and with an increase of the process current density up to 30 A/dm2.
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