Phase Equilibrium in Ag-Pd-Cu Dental Alloys
- 1 January 1983
- journal article
- research article
- Published by Medical Journals Sweden AB in Acta Odontologica Scandinavica
- Vol. 41 (6) , 363-368
- https://doi.org/10.3109/00016358309162348
Abstract
A dental alloy consisting of Ag-Pd-Cu-Au has been annealed at various temperatures and subsequently quenched to produce a solid solution before a hardening heat treatment. The phases present were studied by means of X-ray diffraction measurements. As in conventional Au-Ag-Cu alloys, an equilibrium of two FCC (face-centered cubic) phases existed up to the solid solution annealing temperature, which is considerably higher in the present alloy (900°C). However, even a rapid quench from 900°C caused a small amount of decomposition of the matrix. The X-ray diffractogram indicated that this new phase is CuPd with a CsCl(B2) superstructure. The greatest hardness after age-hardening at 350°C was achieved with a proper prerequisite solid-solution annealing.Keywords
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