Ageing behaviour in a dental low-gold alloy with high copper content |
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| Authors: | K HAMASAKI K HISATSUNE K UDOH Y TANAKA Y IIJIMA O TAKAGI S NARUSE |
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| Affiliation: | (1) Department of Preventive Dentistry, Nagasaki, 852, Japan;(2) Department of Dental Materials Science, Nagasaki University School of Dentistry, Nagasaki, 852, Japan |
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| Abstract: | Phase transformation behaviour in a dental low-gold alloy with high copper content during continuous heating was investigated by hardness tests, electrical resistivity measurements, X-ray diffraction, scanning and transmission electron microscopies. Two kinds of solution treatment conditions (at 873 K and 1073 K) followed by iced-brine quench, represented different ageing behaviours. Although subsequent anisothermal annealing produced same phase separation of face-centred cubic disordered and ordered (Cu3Au) phases in both specimens, the specimen quenched from 1073 K had already been hardened by a spinodal decomposition. © 1998 Chapman & Hall |
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