Formation of Hydroxyapatite Coatings on Titanium by Plasma-Electrolytic Oxidation in Alkaline Electrolytes

The coatings manifesting ferromagnetic characteristics have been formed on titanium and aluminum by plasma electrolytic oxidation (PEO) in alkaline electrolytes additionally containing iron oxalate and cobalt or nickel acetate. The metals of iron subgroup are found to be concentrated in pores of PEO coatings, as a rule, in form of crystallites. In a number of cases the relation between crystallite compositions and magnetic properties of the coatings has been established.

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INVESTIGATION OF THE INFLUENCE OF COMPONENT COMPOSITION OF PEO ELECTROLYTES ON THEIR STABILITY AND COATING PROPERTIES

Proceedings of VIAM ◽

10.18577/2307-6046-2020-0-11-102-112 ◽

2020 ◽

pp. 102-112

Author(s):

Ya.S. Kuzin ◽

◽

I.A. Kozlov ◽

S.V. Sibileva ◽

M.A. Fomina ◽

...

Keyword(s):

Plasma Electrolytic Oxidation ◽

Liquid Glass ◽

Component Composition ◽

Structure And Properties ◽

Coating Properties ◽

Properties Of Coatings ◽

Electrolytic Oxidation ◽

Alkaline Electrolytes ◽

Plasma Electrolytic ◽

Coating Growth

The efficiency of various variants of the component composition of alkaline electrolytes of plasma electrolytic oxidation (PEO) was studied. Technical liquid glass, NaOH, Na2B4O7, Na3PO4, and NaAlO2 were used as components of aqueous solutions. All of the studied components of electrolytes are the most common for use in PEO processes of aluminum alloys. The influence of the component composition of electrolytes on their stability during 30 days of exposure was evaluated, and the most stable compositions were selected. The structure and properties of coatings formed on samples of aluminum alloy AK6 during PEO are studied. The dependences of the hardness of coatings and their growth rate on the composition of the electrolyte are established. Possible variants of coating growth in the PEO process with different component composition of electrolytes are proposed.

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Formation of strontium-substituted hydroxyapatite coatings on bulk Ti and TiN-coated substrates by plasma electrolytic oxidation

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2018.02.017 ◽

2018 ◽

Vol 350 ◽

pp. 1112-1119 ◽

Cited By ~ 6

Author(s):

Huan-Ping Teng ◽

Hsin-Yi Lin ◽

Yu-Hsin Huang ◽

Fu-Hsing Lu

Keyword(s):

Plasma Electrolytic Oxidation ◽

Hydroxyapatite Coatings ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Mg-Containing Hydroxyapatite Coatings Produced by Plasma Electrolytic Oxidation of Titanium

Materials Research ◽

10.1590/1980-5373-mr-2016-0686 ◽

2017 ◽

Vol 20 (4) ◽

pp. 891-898 ◽

Cited By ~ 2

Author(s):

César Augusto Antônio ◽

Elidiane Cipriano Rangel ◽

Steven Frederick Durrant ◽

Adriana de Oliveira Delgado-Silva ◽

Manfredo H. Tabacniks ◽

...

Keyword(s):

Plasma Electrolytic Oxidation ◽

Hydroxyapatite Coatings ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Growth of hydroxyapatite coatings on tantalum by plasma electrolytic oxidation in a single step

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2018.10.079 ◽

2019 ◽

Vol 357 ◽

pp. 698-705 ◽

Cited By ~ 12

Author(s):

Rosana F. Antonio ◽

Elidiane C. Rangel ◽

Bruna A. Mas ◽

Eliana A.R. Duek ◽

Nilson C. Cruz

Keyword(s):

Plasma Electrolytic Oxidation ◽

Single Step ◽

Hydroxyapatite Coatings ◽

Electrolytic Oxidation ◽

Plasma Electrolytic

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Plasma Electrolytic Oxidation of Magnesium Alloy AZ31B in Electrolyte Containing Al2O3 Sol as Additives

Materials ◽

10.3390/ma11091618 ◽

2018 ◽

Vol 11 (9) ◽

pp. 1618 ◽

Cited By ~ 3

Author(s):

Xiaohua Tu ◽

Chengping Miao ◽

Yang Zhang ◽

Yaling Xu ◽

Jiayou Li

Keyword(s):

Corrosion Resistance ◽

Plasma Electrolytic Oxidation ◽

X Ray Diffraction ◽

Peak Intensity ◽

Magnesium Alloy Az31b ◽

Electrolytic Oxidation ◽

Microhardness Testing ◽

Alkaline Electrolytes ◽

Plasma Electrolytic ◽

Peo Coatings

Plasma electrolytic oxidation (PEO) coatings were produced on AZ31B magnesium alloys in alkaline electrolytes with the addition of various concentrations of Al2O3 sols. Effects of Al2O3 sol concentrations on the microstructure, phase composition, corrosion resistance and hardness of PEO coatings were evaluated by scanning electron microscopy (SEM), X-ray diffraction (XRD), microhardness testing and potentiodynamic polarization measurements, respectively. It was revealed that the Al2O3 sol mostly participated in the formation of the ceramic coating and transferred into the MgAl2O4 phase. With the increase of the Al2O3 sol concentration in the range of 0–6 vol%, the coating performance in terms of the microstructure, diffraction peak intensity of the MgAl2O4 phase, corrosion resistance and microhardness was improved. Further increase of Al2O3 sol addition did not generate better results. This indicated that 6 vol% might be the proper Al2O3 sol concentration for the formation of PEO coatings.

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