High temperature characteristics and solidification microstructures of dental metallic materials. Part II ADAS Type 3 gold alloy

Sakae Nagasawa, Takamitsu Yoshida, Nobuyoshi Terashima, Toshihide Mizoguchi, Hiroshi Yagasaki, Koichiro Kamijo, Michio Ito, Jeffrey A. Platt, Yoshiki Oshida

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Previously, high temperature properties of the silver-palladium-copper-gold alloy were investigated. In this study, the thermal expansion percentage and coefficient, and high temperature strengths of ADAS Type 3 gold alloy were investigated up to the liquidus temperature. Furthermore, microstructural and compositional changes in the solid/liquid dual phase were studied. The following conclusions were obtained. (1) The solidus point of the Type 3 gold alloy was 899.3±11.7°C, and the liquidus point was 962.3±2.4°C. (2) The thermal expansion percentage at the solidus point was 1.636±0.046%, while it was 4.853±0.213% for the liquidus point. The thermal expansion percentage of the melt was 3.217±0.257%. (3) The melt expansion was observed even under the measuring pressure of 373.75 HPa, which was quite different from the fact that the melt expansion disappeared at the pressure of 20.87 HPa for the silver-palladium-copper-gold alloy. (4) The morphology of solid phase in the solid/liquid dual zone of this alloy was quite different from those observed with the silver-palladium-copper-gold alloy.

Original languageEnglish (US)
Pages (from-to)81-88
Number of pages8
JournalDental Materials Journal
Volume23
Issue number2
DOIs
StatePublished - Jun 2004

Keywords

  • ADAS Type 3 gold alloy
  • High temperature characteristics
  • Solidification microstructure

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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