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Microstructures of Duplex (β + ) Silver-Tin Alloys
J.R. Abbott
now Faculty of Dentistry, The University of Adelaide, Adelaide, S.A. 5000, Australia
D.R. Miller
Department of Chemical Engineering, The University of Adelaide, Adelaide, S.A. 5000, Australia
D.J. Netherway
now Defence Research Centre, Salisbury, S.A. 5108, Australia
The microstructures of (β + ) silver-tin alloys are especially influenced by both homogenization temperature and subsequent heat treatment. When the alloy is cooled from homogenization temperatures above approximately 200°C, lenticular regions of the ordered orthorhombic phase precipitate from within the disordered h.c.p. β_phase on three structurally equivalent planes, (1210), (1120), and (2110), to form a Widmanstatten structure. When the duplex alloys were homogenized at temperatures below approximately 200°C, where the β/(β + ) phase boundary is vertical, these structures were not observed.
Journal of Dental Research, Vol. 64, No. 5,
860-864 (1985)
DOI: 10.1177/00220345850640051501

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