Adhesive strength of bioactive oxide layers fabricated on TNTZ alloy by three different alkali-solution treatments

E. Takematsu, Ken Cho, Junko Hieda, M. Nakai, K. Katsumata, K. Okada, M. Niinomi, N. Matsushita

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Bioactive oxide layers were fabricated on Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) by three different alkali solution treatments: hydrothermal (H), electrochemical (E), and hydrothermal-electrochemical (HE). The adhesive strength of the oxide layer to the TNTZ substrate was measured to determine whether this process achieves sufficient adhesive strength for implant materials. Samples subjected to the HE process, in which a current of 15 mA/cm2 was applied at 90 °C for 1 h (HE90-1h), exhibited a comparatively higher adhesive strength of approximately 18 MPa while still maintaining a sufficiently high bioactivity. Based on these results, an oxide layer fabricated on TNTZ by HE90-1h is considered appropriate for practical biomaterial application, though thicker oxide layers with many cracks can lead to a reduced adhesive strength.

Original languageEnglish
Pages (from-to)174-181
Number of pages8
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume61
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • Adhesive strength
  • Anodization
  • Bioactive oxide layer
  • Hydrothermal-electrochemical processing
  • TNTZ alloy
  • Tensile strength

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

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