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Structural Changes in the Oxidation Zones of Gold Alloys for Porcelain Bonding Containing Small Amounts of Fe and Sn

Department of Dental Materials Science, School of Dentistry, Higashi-Nippon-Gakuen University, 061-02 Ishikari-Tobetsu, Hokkaido, Japan

Y. Kanzawa

Department of Dental Materials Science, School of Dentistry, Higashi-Nippon-Gakuen University, 061-02 Ishikari-Tobetsu, Hokkaido, Japan

The oxidized surfaces of cross-sections of gold alloys containing a total of 1.5 mass % Fe and Sn, oxidized at 1000 °C for one hr, have been studied by various techniques, including secondary electron micro-analysis, X-ray micro-analysis, X-ray diffraction, and thermogravimetry.

Over the composition range (0.30 - 1.50 mass % Fe), an external oxidation zone containing only Fe oxides was formed. The quantity of Fe203 was greater than that of Sn02 for 0.45 - 1.50 mass % Fe. With an Fe content below 0.45 mass %, the amount of Sn02 was greater than that of Fe₂O₃ . Traces of Fe304 were formed in high Sn content alloys.

Internal oxidation particles composed of Fe203 and Sn02 precipitated deep in the alloy matrix (0.90 - 1.50 mass % Fe), and these changed to an internal oxidation band composed mainly of Sn02 for 0.3 mass % Fe.

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Journal of Dental Research, Vol. 64, No. 1, 67-73 (1985)
DOI: 10.1177/00220345850640011401


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Ohno, H. Articles by Kanzawa, Y. Search for Related Content PubMed PubMed Citation Articles by Ohno, H. Articles by Kanzawa, Y. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB FERRIC OXIDE HEMATITE IRON TIN TIN COMPOUNDS Social Bookmarking                         What's this?