Comparative study of the structure, properties, and corrosion behavior of Sr-containing biocoatings on Mg0.8Ca

Mariya B. Sedelnikova, Yurii P. Sharkeev, Tatiana V. Tolkacheva, Margarita A. Khimich, Olga V. Bakina, Alla N. Fomenko, Aigerim A. Kazakbaeva, Inna V. Fadeeva, Vladimir S. Egorkin, Sergey V. Gnedenkov, Juergen Schmidt, Kateryna Loza, Oleg Prymak, Matthias Epple

Research output: Contribution to journalArticle

Abstract

A comparative analysis of the structure, properties and the corrosion behavior of the micro-arc coatings based on Sr-substituted hydroxyapatite (Sr-HA) and Sr-substituted tricalcium phosphate (Sr-TCP) deposited on Mg0.8Ca alloy substrates was performed. The current density during the formation of the Sr-HA coatings was higher than that for the Sr-TCP coatings. As a result, the Sr-HA coatings were thicker and had a greater surface roughness Ra than the Sr-TCP coatings. In addition, pore sizes of the Sr-HA were almost two times larger. The ratio (Ca + Sr + Mg)/P were equal 1.64 and 1.47 for Sr-HA and Sr-TCP coatings, respectively. Thus, it can be assumed that the composition of Sr-HA and Sr-TCP coatings was predominantly presented by (Sr, Mg)-substituted hydroxyapatite and (Sr, Mg)-substituted tricalcium phosphate. However, the average content of Sr was approximately the same for both types of the coatings and was equal to 1.8 at.%. The Sr-HA coatings were less soluble and had higher corrosion resistance than the Sr-TCP coatings. Cytotoxic tests in vitro demonstrated a higher cell viability after cultivation with extracts of the Sr-HA coatings.

Original languageEnglish
Article number1942
JournalMaterials
Volume13
Issue number8
DOIs
Publication statusPublished - 1 Apr 2020

Keywords

  • Biocoatings
  • Cell viability
  • Corrosion resistance
  • Magnesium alloy
  • Micro-arc oxidation
  • Sr-hydroxyapatite
  • Sr-tricalcium phosphate
  • Structure

ASJC Scopus subject areas

  • Materials Science(all)

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  • Cite this

    Sedelnikova, M. B., Sharkeev, Y. P., Tolkacheva, T. V., Khimich, M. A., Bakina, O. V., Fomenko, A. N., Kazakbaeva, A. A., Fadeeva, I. V., Egorkin, V. S., Gnedenkov, S. V., Schmidt, J., Loza, K., Prymak, O., & Epple, M. (2020). Comparative study of the structure, properties, and corrosion behavior of Sr-containing biocoatings on Mg0.8Ca. Materials, 13(8), [1942]. https://doi.org/10.3390/MA13081942