Effect of Cr and Cu Addition on Corrosion Behavior of Ni-Ti Alloys
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概要
- 論文の詳細を見る
The corrosion behavior of three Ni-Ti alloys with compositions as commercial super-elastic orthodontic wires was investigated using polished plate specimens. Corrosion resistance was estimated by potentiodynamic polarization measurement in 0.9% NaCl and 1% lactic acid solutions and analysis of released metals by atomic absorption spectrophotometry. The influence of Cr and Cu addition on the structure of the surface oxide film was examined by X-ray photoelectron spectroscopy (XPS). Addition of 0.19 at% Cr had little effect on the structure of the oxide films and the corrosion resistance of the Ni-Ti alloys. For Ni-Ti-5Cu-0.3Cr alloy, the metallic Cu was enriched at the alloy/oxide film interface, resulting in increased susceptibility to pitting corrosion above +1000 mV. However, the passive current density and the amount of released Ni were not signigicantly increased by the addition of Cu. The study showed that small amounts of Cr and Cu added to change the super-elastic characteristics do not change the corrosion resistance of the Ni-Ti alloy freely immersed in simulated physiological environments.
- 日本歯科理工学会の論文
著者
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飯嶋 雅弘
北医療大・歯・矯正
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MIZOGUCHI Itaru
Department of Orthodontics, School of Dentistry, Health Sciences University of Hokkaido
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飯島 雅弘
北海道医療大学歯学部口腔構造・機能発育学系歯科矯正学分野
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飯嶋 雅弘
北海道医療大学歯学部口腔構造・機能発育学系 歯科矯正学分野
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Endo Kazuhiko
Division Of Biomaterials And Bioengineering Department Of Oral Rehabilitation School Of Dentistry He
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Endo Kazuhiko
Silicon Systems Research Laboratories Nec Corporation
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Endo Kazuhiko
Department Of Dental Materials Science School Of Dentistry Health Sciences University Of Hokkaido
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OHNO Hiroki
Department of Dental Materials Science, School of Dentistry, Health Sciences University of Hokkaido,
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Endo Kazuhiko
Department Of Dental Materials Science Health Sciences University Of Hokkaido School Of Dentistry
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Endo Kazuhiko
Department Of Dental Materials Science School Of Dentistry Health Science University Of Hokkaido
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Ohno Hiroki
北海道医療大学 歯学部歯科矯正学
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Ohno H
Division Of Biomaterials And Bioengineering Department Of Oral Rehabilitation School Of Dentistry He
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Ohno Hiroki
Department Of Biology Kyoto University Of Education
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IIJIMA Masahiro
Department of Neurology, Nagoya University Graduate School of Medicine
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Mizoguchi I
Division Of Orthodontics And Dentofacial Orthopedics Department Of Oral Growth And Development Schoo
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Mizoguchi Itaru
Department Of Orthodontics School Of Dentistry Health Sciences University Of Hokkaido
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Iijima Masahiro
Division Of Orthodontics And Dentofacial Orthopedics Department Of Oral Growth And Development Schoo
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Iijima Masahiro
Department Of Neurology Nagoya University Graduate School Of Medicine
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