Corrosion resistance and biocompatibility of Ti-Ta alloys for biomedical applications

Ying Long Zhou, Mitsuo Niinomi, Toshikazu Akahori, Hisao Fukui, Hiroyuki Toda

研究成果: ジャーナルへの寄稿学術誌査読

230 被引用数 (Scopus)

抄録

Corrosion resistance, wear resistance and biocompatibility of the studied Ti-Ta alloys with Ta contents of 10, 30 and 70 mass% together with the currently used metallic biomaterials pure titanium (Ti) and Ti-6Al-4V extra low interstitial (ELI) alloy were investigated for biomedical applications. Corrosion resistance was measured by an anodic polarization test using an automatic potentiostat in 5% HCl solution at 310 K. Wear resistance was evaluated using a pin-on-disk type friction wear test system with a load of 4.9 N at 310 K in a simulated body fluid (Ringer's solution), and biocompatibility was judged by evaluating the cyto-toxicity through MTT assay. The passive behaviors are observed for all the studied Ti-Ta alloys, and the TiO2 passive films strengthened by the more stable Ta2O5 passive films result in improved corrosion resistance of the studied Ti-Ta alloys with increasing Ta content. All the studied Ti-Ta alloys are non-cytotoxic like pure Ti. The crystal structure shows little influence on the corrosion resistance and cyto-toxicity of the studied Ti-Ta alloys. The experimental results conform the expected excellent corrosion resistance and biocompatibility of the studied Ti-Ta alloys, which are better than or similar to those of pure Ti or Ti-6Al-4V ELI alloy used as standard biomaterials, suggesting their promising potential for biomedical applications.

本文言語英語
ページ(範囲)28-36
ページ数9
ジャーナルMaterials Science and Engineering A
398
1-2
DOI
出版ステータス出版済み - 5月 25 2005
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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