Izvorni znanstveni članak
Influence of heat treatment on the silver-palladium alloy microstructure
Jesenka Živko-Babić
; Zavod za fiksnu protetiku, Stomatološkog fakulteta S veučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
Cast dental alloys, even those made of precious metals, are not homogeneous. In order to ensure a high-quality cast, it was necessary to determine optimal casting temperature and additional heat treatment to allow for homogenization of the cast in the microarea of the dendritic structure to occur which, in turn, implies chemical inertia of the metal construction to the organic medium of the mouth. A number of melting, homogenizing and aging tests showed the optimal regimen for bringing an Ag-Pd alloy to the level of hardness of the tooth enamel (about 330 HV 0.1) to consist of a technological treatment involving the following procedures: casting at 1100— 1150°C, homogenization at 850°C, quenching in water and 20-min precipitation at 350°C.
Ključne riječi
Silver-palladium alloy; casting; homogenization
Hrčak ID:
101234
URI
Datum izdavanja:
15.6.1989.
Posjeta: 1.285 *