Journal
SURFACE & COATINGS TECHNOLOGY
Volume 328, Issue -, Pages 513-517Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2016.09.071
Keywords
Zr-Nb alloy; Yttria nanopowder; Plasma electrolytic oxidation; Coating morphology and structure; Monoclinic and tetragonal zirconia
Ask authors/readers for more resources
The structure and composition of ceramic coatings formed by plasma electrolytic oxidation (PEO) of Zr-1% Nb alloy under AC conditions in silicate-hypophosphite electrolyte with additives of yttria nanopowder have been analyzed by scanning electron microscopy, X-ray microanalysis and XRD analysis. The yttria nanopowder in electrolyte leads to formation of additional thin superficial layer enriched in conglomerates of Y2O3 nanoparticles. The yttria leads to inhibition of low-temperature m-ZrO2 phase in PEO coating. After addition of 6 g/L yttria nanopowder in the electrolyte only t-ZrO2 phase was found in the coating surface layer. The excess part of Y2O3 nanoparticles is not involved in the PEO process of zirconia formation and remains in the PEO coatings in the form of inclusions. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available