Formation of Titania/Hydroxyapatite Composite Films by Pulse Electrolysis

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  • Kuroda Kensuke
    Department of Materials Science & Engineering, Graduate School of Engineering, Nagoya University
  • Shidu Hironobu
    Department of Materials Science & Engineering, Graduate School of Engineering, Nagoya University
  • Ichino Ryoichi
    Department of Materials Science & Engineering, Graduate School of Engineering, Nagoya University
  • Okido Masazumi
    Department of Materials Science & Engineering, Graduate School of Engineering, Nagoya University

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Other Title
  • パルス電解法を用いたチタニア／水酸アパタイト複合膜の作製
  • パルス デンカイホウ オ モチイタ チタニア スイサン アパタイト フクゴウマク ノ サクセイ

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  The aim of this study was to examine the formation of titania (TiO2)/hydroxyapatite (HAp) composite films on a titanium substrate using anodic-cathodic pulse electrolysis. The TiO2/HAp composites were coated on commercial pure titanium plates (surface area: 1.0 cm2) using pulse electrolysis in an autoclave in an aqueous solution that consisted of 0.3 mM Ca(H2PO4)2 and 0.7 mM CaCl2 and pH=5.5 at 120°C. The pulse potentials were applied at +8.7 V vs. Ag/AgCl sat. KCl as anodic potential and -9.3 V as cathodic. The total electrolysis time was 1800 s. We examined the effects of the electrolysis cycle (60~600 s) and duty ratio on such properties of the coatings as the surface morphology, the amount of precipitated HAp, and the size of the HAp crystals. Prior to the pulse electrolysis, cathodic and anodic electrolysis experiments were also conducted. With pulse electrolysis, we could obtain TiO2/ HAp composite films with fine HAp particles dispersed uniformly on a thin TiO2 coating.<br>

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