Comparative evaluation of the effect of simulated porcelain firing cycle on the mechanical properties and microstructure of base metal ceramic alloys.
Artigo
em Inglês
| IMSEAR
| ID: sea-51426
ABSTRACT
A comparison of mechanical properties and microstructure of four metal ceramic alloys in as-cast and heat-treated conditions resulted in significant differences. The alloys that were tested included two nickel-based and two cobalt-based metal ceramic alloys. Mechanical properties tested included strength, percent elongation and hardness. Ten tensile bars were cast for each alloy. Five of the ten bars for each alloy were randomly selected for heat treatment with the simulated porcelain firing cycle. Results indicated that the nickel-based alloys were weakened by the heat treatment and showed a decreased hardness and an increased elongation. The effects of heat treatment on the strength of cobalt-based alloys were variable, showing an increase in hardness and a decrease in elongation. Differences in mechanical properties exhibited by the alloys were related to compositional and microstructural changes.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Resistência à Tração
/
Teste de Materiais
/
Análise de Variância
/
Técnica de Fundição Odontológica
/
Ligas Metalo-Cerâmicas
/
Cobalto
/
Elasticidade
/
Dureza
/
Temperatura Alta
/
Níquel
Idioma:
Inglês
Ano de publicação:
1999
Tipo de documento:
Artigo
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