Mössbauer studies of iron-containing oxide coatings with different Fe/Co atomic ratios formed on titanium and aluminum by plasma-electrolytic oxidation

Abstract

In this work, iron-containing oxide coatings with different Fe/Co atomic ratios formed on titanium and aluminum in the process of plasma- electrolytic oxidation, were studied using the Mössbauer spectroscopy method. It was determined that the contribution of the high-spin spectral component of Fe(III) is minimal in the absence of cobalt and is maximum with the predominance of cobalt in coatings formed on titanium. On coatings formed on aluminum, the presence of a magnetically ordered spectral component of Fe(III) was discovered, which disappears with the predominance of cobalt in the coating.