Stabilization of the high-temperature phases in ceramic coatings on zirconium alloy produced by plasma electrolytic oxidation

19th Conference on Plasma Surface Interactions

Apelfeld, A.V.^1 ; Betsofen, S.Y.^1 ; Borisov, A.M.^1 ; Vladimirov, B.V.^1 ; Savushkina, S.V.^2 ; Knyazev, E.V.^3

Moscow Aviation Institute (National Research University), 4 Volokolamskoe highway, Moscow

125993, Russia^1

Keldysh Research Center, 8 Onezhskaya st., Moscow

125438, Russia^2

Intermix Met LLC, 2A Rabochaya st., Moscow

141400, Russia^3

关键词: Aqueous electrolyte;    Cubic zirconia;    High temperature;    High-temperature phasis;    Nano powders;    Plasma electrolytic oxidation;    X-ray microanalysis;    X-ray phase analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/748/1/012019/pdf
DOI  :  10.1088/1742-6596/748/1/012019

来源: IOP

【 摘 要 】

The composition and structure of ceramic coatings obtained on Zr-1%Nb alloy by plasma electrolytic oxidation (PEO) in aqueous electrolyte comprising 2 g/L KOH, 6 g/L NaAlO2and 2 g/L Na2SiO3with addition of yttria nanopowder, have been studied. The PEO coatings of thickness ∼20 μm were studied using scanning electron microscopy, X-ray microanalysis and X-ray phase analysis. Additives in the electrolyte of yttria nanopowder allowed stabilizing the high-temperature tetragonal and cubic zirconia in the coating.