Surface characterization of Ni-Ti alloy modified by isothermal oxidation

Hirokatsu Sugawara, Hirotake Goto, Jun Komotori

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In order to improve the corrosion resistance of Ni-Ti alloys, mechanically polished Ni-Ti alloys discs were subjected to isothermal oxidation (TO) treatment in N2-20vol.%O2 at temperatures ranging from 300 to 800°C. TO-treated surfaces were then analyzed by Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive X-ray spectroscopy (EDX), and X-ray electron spectroscopy (XPS). Electrochemical corrosion tests and wear tests were carried out. Ni-Ti alloys exhibited different oxidation behavior depending on the treatment temperatures. An almost Ni free layer was observed on the surface layer of the specimens treated at temperatures 500°C and above. TO-treated specimens showed a higher corrosion resistance compared to that of the untreated sample, and a higher wear resistance. Consequently, TO-treatment produced an almost nickel free smooth protective oxide layer, which might contribute to good biocompatibility.

Original languageEnglish
Pages (from-to)3573-3578
Number of pages6
JournalInternational Journal of Modern Physics B
Volume20
Issue number25-27
Publication statusPublished - 2006 Oct 30

Fingerprint

Oxidation
Corrosion Resistance
corrosion resistance
oxidation
Corrosion resistance
electrochemical corrosion
Field Emission
corrosion tests
Electrochemical corrosion
Electron spectroscopy
X-ray Spectroscopy
wear tests
biocompatibility
Nickel
Corrosion
Scanning Electron Microscopy
X ray spectroscopy
wear resistance
Biocompatibility
Field emission

Keywords

  • Biomaterials
  • Ni-Ti alloy
  • Shape memory alloys
  • Surface treatment
  • Thermal oxidation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

Surface characterization of Ni-Ti alloy modified by isothermal oxidation. / Sugawara, Hirokatsu; Goto, Hirotake; Komotori, Jun.

In: International Journal of Modern Physics B, Vol. 20, No. 25-27, 30.10.2006, p. 3573-3578.

Research output: Contribution to journalArticle

Sugawara, Hirokatsu ; Goto, Hirotake ; Komotori, Jun. / Surface characterization of Ni-Ti alloy modified by isothermal oxidation. In: International Journal of Modern Physics B. 2006 ; Vol. 20, No. 25-27. pp. 3573-3578.
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