title: Adhesive strength of bioactive oxide layers fabricated on TNTZ alloy by three different alkali-solution treatments.
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 15mA/cm(2) was applied at 90°C for 1h (HE90-1h), exhibited a comparatively higher adhesive strength of approximately 18MPa 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.
authors: Department of Electrochemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226 8503, Japan.
authors: E
authors: E
authors: Takematsu
authors: Division of Materials and Manufacturing Science, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565 0871, Japan.
authors: K
authors: K
authors: Cho
authors: Department of Mechanical Science and Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan.
authors: J
authors: J
authors: Hieda
authors: Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 985 8577, Japan.
authors: M
authors: M
authors: Nakai
authors: Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278 8510, Japan.
authors: K
authors: K
authors: Katsumata
authors: Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan.
authors: K
authors: K
authors: Okada
authors: Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 985 8577, Japan.
authors: M
authors: M
authors: Niinomi
authors: Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan; Department of Electrochemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226 8503, Japan. Electronic address: matsushita.n.ab@m.titech.ac.jp.
authors: N
authors: N
authors: Matsushita
mesh_terms: D000269:Adhesives; D000468:Alkalies / Q000737:chemistry*; D003722:Dental Alloys; D008422:Materials Testing; D009556:Niobium; D010087:Oxides / Q000737:chemistry*; D013499:Surface Properties; D013635:Tantalum; D013718:Tensile Strength; D014025:Titanium; D015040:Zirconium
chemical_list: D000269:Adhesives; D000468:Alkalies; D003722:Dental Alloys; D010087:Oxides; C481486:Ti-29Nb-13Ta-4.6Zr alloy; D009556:Niobium; D013635:Tantalum; D015040:Zirconium; D014025:Titanium
keywords: Adhesive strength; Anodization; Bioactive oxide layer; Hydrothermal–electrochemical processing; TNTZ alloy; Tensile strength