Coating of hydroxyapatite films on titanium substrates by electrodeposition under pulse current

Tomoyasu Hayakawa, Masakazu Kawashita, Gikan H. Takaoaka

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Titanium (Ti) metal substrates were etched in sulfuric acid (H 2SO4) with concentrations of 25, 50, 75 and 97% at 60°C for 30 min. Hydroxyapatite (HA) films were deposited onto unetched and etched substrates by an electrodeposition method under a pulse current. The electrolyte was metastable calcium phosphate solution that had 1.5 times the ion concentrations of human body fluid, but did not contain magnesium ion at 36.5°C. Deposition times were 90 min. We used the average current density of 0.01 A/cm2 and ON time equal to OFF time of 15 s. In the electrodeposition, hydrogen was incorporated into the surface of the Ti substrates to form titanium hydride (TiH2) on the substrate surfaces. After the electrodeposition, all specimens were heated at 600°C for 60 min. The adhesion between apatite and substrates were greatly improved by the heat treatment for the substrates etched in 50 and 75% H2SO4. It is considered that in these specimens the anchoring effect due to the microstructural roughness formed by etching was enhanced by the shrinking of HA crystals during the heat treatment.

本文言語English
ページ(範囲)68-73
ページ数6
ジャーナルJournal of the Ceramic Society of Japan
116
1349
DOI
出版ステータスPublished - 2008 1月
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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