TY - JOUR
T1 - Corrosion resistance and biocompatibility of Ti-Ta alloys for biomedical applications
AU - Zhou, Ying Long
AU - Niinomi, Mitsuo
AU - Akahori, Toshikazu
AU - Fukui, Hisao
AU - Toda, Hiroyuki
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/5/25
Y1 - 2005/5/25
N2 - 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.
AB - 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.
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U2 - 10.1016/j.msea.2005.03.032
DO - 10.1016/j.msea.2005.03.032
M3 - Article
AN - SCOPUS:18844382669
VL - 398
SP - 28
EP - 36
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -