Investigation of the heat resistance of zirconia coatings generated by microarc oxidation

Савушкина, С. В.; Polyansky, M. N.; Борисов, А. М.; Виноградов, А. В.; Lyudin, V. B.; Dankova, T. E.; Агуреев, Л. Е.

doi:10.1134/s1027451016020336

Cited by 6 publications

(1 citation statement)

References 13 publications

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“…In [35,36], the possibility of zirconia high-temperature phases (tetragonal t-ZrO 2 and cubic c-ZrO 2 ) stabilizing in PEO coatings by introducing additives of yttria nanoparticles in electrolytes was investigated. In [37,38], high thermal shock resistance and good thermal barrier properties of PEO coatings on zirconium and its alloys were noted. In [39], it was found that after 20-30 min of the PEO process, the quantity of small microdischarges on being treated zirconium surface significantly decreases, while that of large ones increases.…”

Section: Introductionmentioning

confidence: 99%

Study of Coatings Formed on Zirconium Alloy by Plasma Electrolytic Oxidation in Electrolyte with Submicron Yttria Powder Additives

Савушкина

Герасимов

Apelfeld

et al. 2021

Metals

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Coatings with thickness 40 to 150 μm were formed by plasma electrolytic oxidation (PEO) on the zirconium alloy Zr-1Nb (Zr-1% Nb) in the slurry electrolyte containing 9 g/L Na2SiO3 5H2O, 5 g/L Na(PH2O2) and 6 g/L submicron Y2O3 yttria powder during 60 min under the AC electrical mode at current densities 20; 30 and 40 A/dm2. The surface morphology, structure, composition, and corrosion-protective ability of the formed coatings have been analyzed. At PEO current density 30 A/dm2, a predominantly tetragonal phase of zirconia was formed in coatings. Increasing the PEO current density up to 40 A/dm2 promoted the formation of the coating surface layer containing submicron yttria particles. Electrochemical polarization studies in 0.5% LiOH solution showed that PEO coatings demonstrated high corrosion-protective ability. The dependence of the polarization currents on the PEO current density was found to be inconsequential.

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Section: Introductionmentioning

confidence: 99%

Study of Coatings Formed on Zirconium Alloy by Plasma Electrolytic Oxidation in Electrolyte with Submicron Yttria Powder Additives

Савушкина

Герасимов

Apelfeld

et al. 2021

Metals

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show abstract

Formation of zirconia tetragonal phase by plasma electrolytic oxidation of zirconium alloy in electrolyte comprising additives of yttria nanopowder

Apelfeld

Ашмарин

Борисов

et al. 2017

Surface and Coatings Technology

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Structure and properties of ceramic-like coating on zirconium alloy produced by microarc oxidation in electrolyte with submicron yttria powder additives

Sivtsova

Савушкина

Ашмарин

et al. 2019

J. Phys.: Conf. Ser.

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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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Investigation of the heat resistance of zirconia coatings generated by microarc oxidation

Cited by 6 publications

References 13 publications

Study of Coatings Formed on Zirconium Alloy by Plasma Electrolytic Oxidation in Electrolyte with Submicron Yttria Powder Additives

Study of Coatings Formed on Zirconium Alloy by Plasma Electrolytic Oxidation in Electrolyte with Submicron Yttria Powder Additives

Formation of zirconia tetragonal phase by plasma electrolytic oxidation of zirconium alloy in electrolyte comprising additives of yttria nanopowder

Structure and properties of ceramic-like coating on zirconium alloy produced by microarc oxidation in electrolyte with submicron yttria powder additives

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