Comparative study of the hydroxyapatite coatings prepared with/without substrate bias

Stanislav Dudin, Cosmin M. Cotrut, Mihaela Dinu, Anna Zykova, Anca C. Parau, Stanislav Yakovin, Alina Vladescu

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13 Citations (Scopus)


The aim of this paper is to prepare the hydroxyapatite by Ion Beam Assisted Deposition and to investigate in terms of its elemental and phase composition, roughness and in vitro corrosion resistance. The coatings were prepared with and without applying bias on substrate, in order to find the effect of bias on the chemical, structural, morphological and anti-corrosive properties. The biased coatings exhibited Ca/P ratio closer to the value of the stoichiometric HAP (1.67). The phase composition is not affected by the bias evolution. The adhesion of both coatings is still satisfactory for biomedical applications, irrespective of the bias. Hydroxyapatite deposited without bias presented the best corrosion resistance in SBF at 37 °C, probably due to its smooth surface and low porosity. Moreover, this coating proved to have the highest protection ability at the SBF corrosive attack.

Original languageEnglish
Pages (from-to)14968-14975
Number of pages8
JournalCeramics International
Issue number17
Publication statusPublished - 1 Dec 2017


  • A: Films
  • B: Porosity, X-ray methods
  • C: Corrosion
  • D: Apatite
  • E: Biomedical applications

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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