Surface characteristics of titanium-silver alloys in artificial saliva

H. M. Shim, K. T. Oh, J. Y. Woo, ChungJu Hwang, K. N. Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Titanium and its alloys are widely used in biomedical and dental fields because of their excellent corrosion resistance and biocompatibility. It is well known that titanium is protected from corrosion because of the stability of the passive film that controls and determines the corrosion resistance and biocompatibility of titanium and its alloys. The purpose of this study was to evaluate the electrochemical properties of titanium-silver alloys and the surface characteristics of passive film in artificial saliva. We designed titanium-silver alloys with silver contents ranging from 0 to 5 at.%, in 1% increments. These alloys were arc-melted, homogenized, hot-rolled to 2 mm thickness, and finally solution heat-treated for 1 h and quenched. Potentiostatic testing was performed, and the open circuit potentials of the alloys were measured in artificial saliva, at 37°C. The passive films of the titanium-silver alloys were analyzed via XPS. Titanium-silver alloys maintained low current density and showed stable passive region and also had high open circuit potential as compared with pure titanium. The open circuit potential of titanium-silver alloys increased as silver addition increased. With regard to the fraction of oxygen species, a component of over 80% was found to be comprised of oxide. Therefore, the titanium surface mainly consisted of titanium oxide and, on the titanium-silver alloys, this film was composed of TiO2, Ti2O3, and TiO. As silver content increased, the TiO2 fraction also increased, as did the thickness of the titanium oxide layer formed.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
JournalSurface and Interface Analysis
Volume38
Issue number1
DOIs
Publication statusPublished - 2006 Jan 1

Fingerprint

Artificial Saliva
Silver alloys
saliva
silver alloys
titanium alloys
Titanium alloys
Titanium
Silver
Biocompatibility
Corrosion resistance
Networks (circuits)
titanium
Titanium oxides
silver
biocompatibility
titanium oxides
corrosion resistance
Electrochemical properties
Oxides
Current density

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Shim, H. M. ; Oh, K. T. ; Woo, J. Y. ; Hwang, ChungJu ; Kim, K. N. / Surface characteristics of titanium-silver alloys in artificial saliva. In: Surface and Interface Analysis. 2006 ; Vol. 38, No. 1. pp. 25-31.
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Surface characteristics of titanium-silver alloys in artificial saliva. / Shim, H. M.; Oh, K. T.; Woo, J. Y.; Hwang, ChungJu; Kim, K. N.

In: Surface and Interface Analysis, Vol. 38, No. 1, 01.01.2006, p. 25-31.

Research output: Contribution to journalArticle

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