Porous cap coatings formed by combination of plasma electrolytic oxidation and rf-magnetron sputtering

Anna Kozelskaya, Gleb Dubinenko, Alexandr Vorobyev, Alexander Fedotkin, Natalia Korotchenko, Alexander Gigilev, Evgeniy Shesterikov, Yuriy Zhukov, Sergei Tverdokhlebov

Research output: Contribution to journalArticlepeer-review

Abstract

The porous CaP subcoating was formed on the Ti6Al4V titanium alloy substrate by plasma electrolytic oxidation (PEO). Then, upper coatings were formed by radio frequency magnetron sputtering (RFMS) over the PEO subcoating by the sputtering of various CaP powder targets: β-tricalcium phosphate (β-TCP), hydroxyapatite (HA), Mg-substituted β-tricalcium phosphate (Mg-β-TCP) and Mg-substituted hydroxyapatite (Mg-HA), Sr-substituted β-tricalcium phosphate (Sr-β-TCP) and Sr-substituted hydroxyapatite (Sr-HA). The coating surface morphology was studied by scanning electron and atomic force microscopy. The chemical composition was determined by X-ray photoelectron spectroscopy. The phase composition of the coatings was studied by X-ray diffraction analysis. The Young’s modulus of the coatings was studied by nanoindentation test. RF-magnetron sputtering treatment of PEO subcoating resulted in multileveled roughness, increased Ca/P ratio and Young’s modulus and enrichment with Sr and Mg. Sputtering of the upper layer also helped to adjust the coating crystallinity.

Original languageEnglish
Article number1113
Pages (from-to)1-11
Number of pages11
JournalCoatings
Volume10
Issue number11
DOIs
Publication statusPublished - Nov 2020

Keywords

  • Calcium-phosphate (CaP) coating
  • Plasma electrolytic oxidation (PEO)
  • Radio frequency magnetron sputtering (RFMS)

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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