Corrosion Resistance of the Pt-Fe-Nb Magnets for Dental-casting

Katsunori Haoka, Taro Kanno, Yukyo Takada, Kohei Kimura, Osamu Okuno

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Magnetic attachments have been used in clinical dental practice, but there is some difficulties associated with removable bridges. One possible solution is to make whole bridges of Pt-Fe magnet alloys and its abutment out of magnetic stainless steel by casting. In terms of castability and magnetic properties, the promising composition of the Pt-Fe-Nb magnet alloy is Pt-30.0 mass% Fe-0.6 mass% Nb and Pt-30.0 mass% Fe-0.5 mass% Nb-0.03 mass%Si. In the present study, the corrosion resistance of these alloys was investigated based on the elusion test, electrochemical behavior and surface characterization by EPMA analysis. The released elements from the Pt-Fe-Nb magnets were mainly Fe ions in quantities similar to that of stainless steel for biomedical use, and the Pt-Fe-Nb magnet alloy, the Pt-Fe-Nb-Si magnet alloy and platinum resembled each other in electrochemical behavior. The present findings suggest, that the Pt-Fe-Nb magnet alloy provides excellent corrosion resistance and has important clinical dental applications.

Original languageEnglish
Pages (from-to)270-282
Number of pages13
JournalDental materials journal
Volume19
Issue number3
DOIs
Publication statusPublished - 2000 Sep

Keywords

  • Corrosion behavior
  • Dental casting
  • Pt-Fe-Nb magnet alloys

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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