Ageing behaviour in a dental low-gold alloy with high copper content.
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.
Hamasaki
K
K
Department of Preventive Dentistry, Nagasaki University School of Dentistry, Nagasaki 852, Japan.
Hisatsune
K
K
Udoh
K
K
Tanaka
Y
Y
Iijima
Y
Y
Takagi
O
O
Naruse
S
S