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<p>The phase composition of biocompatible coatings manufactured from hydroxyapatite (HA) powder by gas detonation spraying was studied using Raman spectroscopy and x-ray diffraction. The coatings were formed on metal (copper, medical and technical titanium), quartz and polymer (polyetheretherketone, fluoroplastic) substrates. All studied coatings contain crystalline HA and additional (secondary) phases. The amount of secondary phases is shown to depend on the hardness of the substrate material; namely, using substrates with a higher hardness increases the amount of the secondary phase. Moreover, the composition of the secondary phase also depends on the substrate material as follows. It consists of amorphous HA in coatings on metallic substrates, while tricalcium phosphate forms secondary phase in coatings on polymer substrates. The study of coatings with different thicknesses showed the formation of a transition layer between coating and substrate, which has another crystalline HA/secondary phase ratio compared to the whole coating. The obtained experimental data allow us to suppose a formation mechanism of the sprayed coatings based on the macro-characteristics of substrate material, namely hardness and thermal conductivity.</p>

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Phase Composition of Coatings Formed by the Gas Detonation Spraying of Hydroxyapatite Powder

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • I. P. Vorona,
  • V. P. Temchenko,
  • V. B. Lozinskii,
  • Iu.M. Nasieka,
  • O. Yo. Gudymenko,
  • O. F. Isaieva,
  • V. V. Nosenko,
  • A. E. Belyaev,
  • M. Ya. Valakh,
  • V. O. Yukhymchuk,
  • O. V. Shynkaruk,
  • V. A. Dubok

摘要

The phase composition of biocompatible coatings manufactured from hydroxyapatite (HA) powder by gas detonation spraying was studied using Raman spectroscopy and x-ray diffraction. The coatings were formed on metal (copper, medical and technical titanium), quartz and polymer (polyetheretherketone, fluoroplastic) substrates. All studied coatings contain crystalline HA and additional (secondary) phases. The amount of secondary phases is shown to depend on the hardness of the substrate material; namely, using substrates with a higher hardness increases the amount of the secondary phase. Moreover, the composition of the secondary phase also depends on the substrate material as follows. It consists of amorphous HA in coatings on metallic substrates, while tricalcium phosphate forms secondary phase in coatings on polymer substrates. The study of coatings with different thicknesses showed the formation of a transition layer between coating and substrate, which has another crystalline HA/secondary phase ratio compared to the whole coating. The obtained experimental data allow us to suppose a formation mechanism of the sprayed coatings based on the macro-characteristics of substrate material, namely hardness and thermal conductivity.