Abstract
The results of studies of the composition and magnetic characteristics of coatings formed in different time periods on titanium in suspension electrolytes of compositions Na3PO4 + Na2B4O7 + Na2WO4 + Fe2(C2O4)3 (PBWFe, рH 7.8) and Na2НPO4 + Na2B4O7 + Na2WO4 + Fe2(C2O4)3 (P*BWFe, рН 7.4), as well as the characteristics of coatings fabricated in filtrates of both electrolytes, are presented. PBWFe and P*BWFe electrolytes contain colloid particles of iron hydroxides. Crystallites are contained in pores of PBWFe and P*BWFe coatings. The averaged Fe/Ti atomic ratio for crystallites in pores of PBWFe coatings formed in different periods of time is equal to ~2.6, while in pores of P*BWFe coatings it is equal to ~1.1. The samples with PBWFe coatings manifest ferromagnetic properties, while samples with P*BWFe coatings and those obtained in filtrates of both electrolytes are paramagnetics. It was shown that, for PBWFe and P*BWFe coatings formed in different time periods, the composition, thickness, and presence and composition of crystallites in pores, as well as magnetic and other controlled parameters, are fairly reproducible.
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Original Russian Text © V.S. Rudnev, M.V. Adigamova, I.A. Tkachenko, K.I. Yanushkevich, I.V. Lukiyanchuk, V.P. Morozova, 2017, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2017, Vol. 53, No. 5, pp. 499–507.
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Rudnev, V.S., Adigamova, M.V., Tkachenko, I.A. et al. Composition and magnetic characteristics of plasma electrolytic oxide coatings on titanium. Prot Met Phys Chem Surf 53, 826–834 (2017). https://doi.org/10.1134/S2070205117050185
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DOI: https://doi.org/10.1134/S2070205117050185