Effect of Mo and Pd on Corrosion Resistance of V-free Titanium Alloys for Medical Implants
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- Okazaki Yoshimitsu
- Mechanical Engineering Laboratory, Agency of Industrial Science and Technology, Ministry of International Trade and Industry
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- Kyo Kenji
- Nippon Institute of Technology
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- Ito Yoshimasa
- Technical Development Group, Kobe Steel, Ltd.
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- Tateishi Tetsuya
- Mechanical Engineering Laboratory, Agency of Industrial Science and Technology, Ministry of International Trade and Industry
Bibliographic Information
- Other Title
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- Vを含まない生体用Ti合金の耐食性に及ぼすMoとPdの効果
- V オ フクマナイ セイタイヨウ Ti ゴウキン ノ タイショクセイ ニ オヨ
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Abstract
The corrosion resistances of Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N and Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O alloys were compared with pure Ti grade 2, Ti-6%Al-4%V ELI (Extra low interstitial), Ti-6%Al-2%Nb-1%Ta and β type Ti-15%Mo-5%Zr-3%Al alloys for medical implants by anodic polarization and immersion tests at 310 K in various pseudo saline solutions.<BR>The change in current density was small up to passivity zones in 1% lactic acid, PBS(−), calf serum and eagle’s MEM+bovine serum solutions except 5%HCl. The current density change of Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N alloy was lowest among the whole Ti alloys. Current density at higher voltage region more than 2 volt tend to be higher in the following relation; Ti-6%Al-4%V ELI>Pure Ti grade 2>Ti-6%Al-2%Nb-1%Ta>Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O>Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N alloy in α+β type alloys. Otherwise the passive current density of the β type Ti-15%Mo-5%Zr-3%Al alloy was higher than that of α+β type alloys. Passive films formed on Ti-15%Mo-5%Zr-3%Al alloy in the calf serum consisted mainly of TiO2, ZrO2, Al2O3 and Mo as demonstrated by X-ray photoelectron spectroscopy (XPS).<BR>The rate of Ti ion released from Ti alloys in a deaerated 5%HCl solution decreased with increasing Zr, Nb, Ta, and Pd contents. Especially, the rate of Ti ion released from Ti-15%Zr-4%Nb-(2∼4%)Ta-Pd alloys containing Pd in the range from 0 to 0.2% decreased remarkably compared to 0.2 to 0.5%Pd. The passive films formed on the Ti-Zr-Nb-Ta-Pd and Ti-Sn-Nb-Ta-Pd alloys containing 0.2%Pd in the immersion test consist mainly of TiO2, ZrO2, SnO2, Sn, Nb2O5, Ta2O5 and Pd or PdO. The rate of released Ti increased by the following relation; Ti-15%Sn-4%Nb-2%Ta-0.2%Pd-0.2%O≥Ti-6%Al-2%Nb-1%Ta≥Ti-6%Al-4%V ELI≥Pure Ti grade 2>Ti-15%Zr-4%Nb-4%Ta-0.2%Pd-0.2%O-0.05%N≥β type Ti-15%Mo-5%Zr-3%Al alloy.
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 59 (10), 1061-1069, 1995
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390282681468201216
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- NII Article ID
- 130007342081
- 10003509546
- 10001671565
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
- http://id.crossref.org/issn/00214876
- http://id.crossref.org/issn/00214426
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- NDL BIB ID
- 3641788
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed