Effect of casting temperature and atmosphere on castability of Ni-Cr alloys: a comparative study with direct flame casting method



Título del documento: Effect of casting temperature and atmosphere on castability of Ni-Cr alloys: a comparative study with direct flame casting method
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312945
ISSN: 1516-1439
Autores: 1


Instituciones: 1Universidade de Sao Paulo, Escola de Odontologia, Ribeirao Preto, Sao Paulo. Brasil
Año:
Periodo: Abr-Jun
Volumen: 9
Número: 2
Paginación: 237-241
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés The purpose of this study was to compare the effect of casting temperature and atmosphere on the castability of three Ni-Cr alloys against direct flame casting method. Vera Bond (VB), Vera Bond 2 (VB2) and Wiron 99 (W99) were cast at three temperatures: VB and VB2 (1310 °C, 1340 °C and 1370 °C); W99 (1400 °C, 1430 °C and 1460 °C) in atmosphere, vacuum and direct flame. Each alloy was cast in seven different conditions. Castability was assessed by the method that verifies the alloy potential to reproduce a nylon mesh. Kruskal-Wallis test demonstrated for VB, while there was no influence in the temperature range, castability was greater by vacuum (99.3%) than by direct flame (96.2%) and atmosphere (93.06%). For VB2, castability was greater at evaluated temperatures (1370 °C = 94.4%, 1340 °C = 91.15% and 1310 °C = 87.9%) than direct flame (77.8%); related vacuum (97.33%) obtained better values than atmosphere (84.6%) and direct flame. For W99, while atmosphere had no influence, castability was higher at 1460 °C (84.3%) than at other temperatures (1430 °C = 70.3%, 1400 °C = 37.05%) and direct flame (62.5%). Comparison among interactions showed that for all alloys it was possible to significantly increase the filling percentage of the mold in a comparative manner with the direct flame cast method
Disciplinas: Ingeniería,
Medicina
Palabras clave: Ingeniería de materiales,
Odontología,
Aleaciones,
Níquel,
Cromo,
Propiedades mecánicas,
Resistencia,
Temperatura,
Corrosión
Keyword: Engineering,
Medicine,
Materials engineering,
Dentistry,
Alloys,
Nickel,
Chromium,
Mechanical properties,
Resistance,
Temperature,
Corrosion
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