Application of Mössbauer spectroscopy to study the thermal behavior of iron-containing oxide coatings formed on titanium by plasma-electrolytic oxidation

Authors

  • Denis V. Balatskiy Institute of Chemistry, FEB RAS, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia
  • Yulia B. Budnikova Institute of Chemistry, FEB RAS, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia
  • Marina S. Vasilyeva Institute of Chemistry, FEB RAS, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia

Keywords:

plasma electrolytic oxidation, oxide coatings, oxidized forms of iron, thermal annealing, Mössbauer spectroscopy

Abstract

In this work, using the Mössbauer spectroscopy method, we study the thermally induced transformation of the oxidized iron forms in TiO2-POx-FeOx oxide coatings on titanium formed by plasma-electrolytic oxidation. According to Mössbauer spectroscopy data, they all contain Fe(II) and Fe(III), the ratio of which is almost the same in the original sample and samples annealed at temperatures of 100–400 °C, which is observed in their thermal stability in this temperature range. In samples annealed at temperatures of 500-800 °C, a magnetically ordered α-Fe2O3 phase was found, the contribution of which is maximum at an annealing temperature of 700 °C. With an increase in the annealing temperature from 500 to 900 °C, the proportion of high-spin Fe(III) increases, while that of high-spin Fe(II) decreases to zero.

Author Biographies

Denis V. Balatskiy, Institute of Chemistry, FEB RAS, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia

Junior Researcher 

https://orcid.org/0000-0001-8737-9196

Yulia B. Budnikova, Institute of Chemistry, FEB RAS, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia

Engineer of the 1st category 

https://orcid.org/0000-0002-8716-8986

Marina S. Vasilyeva, Institute of Chemistry, FEB RAS, Vladivostok, Russia; Far Eastern Federal University, Vladivostok, Russia

Doctor of Sciences in Chemistry, Leading Researcher 

https://orcid.org/0000-0002-6716-1373

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Published

2022-12-07

How to Cite

Balatskiy Д. В., Budnikova Ю. Б., & Vasilyeva М. С. (2022). Application of Mössbauer spectroscopy to study the thermal behavior of iron-containing oxide coatings formed on titanium by plasma-electrolytic oxidation. Vestnik of the Far East Branch of the Russian Academy of Sciences, (6), 92–99. Retrieved from http://vestnikdvo.ru/index.php/vestnikdvo/article/view/1026

Issue

No. 6 (2022)

Section

Физические методы исследования материалов