Metallurgical evaluation of a copper-based alloy for dental castings.
Quintessence Int
; 22(8): 647-52, 1991 Aug.
Article
em En
| MEDLINE
| ID: mdl-1882060
The present study was designed to evaluate the metallurgical properties of an experimental, low-cost copper-zinc-aluminum-nickel alloy for dental castings. Some specimens were subjected to heat treatment after induction casting. The extent of corrosion was determined by measuring weight loss of specimens stored in a sodium sulfite solution. In the as-cast specimens, tests demonstrated the presence of three phases: the first consisted of copper-zinc-aluminum, the second was similar but lower in copper and aluminum, and the third consisted of an intermetallic compound of manganese-nickel-phosphorus. After heat treatment, the first phase remained relatively constant, the second was converted to Cu3Al, and the third increased in volume. The weight loss from the as-cast specimens was eight times that of the heat-treated specimens. It was concluded that the heat treatment substantially changed the microstructure and improved the corrosion resistance of the experimental alloy.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cobre
/
Ligas Dentárias
Idioma:
En
Revista:
Quintessence Int
Ano de publicação:
1991
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Alemanha