| Revista: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312472 |
| ISSN: | 1516-1439 |
| Autores: | Castro, Walman Benicio de1 Maia, Manuel de Lucena Kiminami, Claudio Shyinti2 Bolfarini, Claudemiro |
| Instituciones: | 1Universidade Federal da Paraiba, Departamento de Engenharia Mecanica, Joao Pessoa, Paraiba. Brasil 2Universidade Federal de Sao Carlos, Departamento de Engenharia de Materiais, Sao Carlos, Sao Paulo. Brasil |
| Año: | 2001 |
| Volumen: | 4 |
| Número: | 2 |
| Paginación: | 83-86 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Melt undercooling opens new solidification pathways for non-equilibrium phases and non-conventional microstructures. Several techniques, including the fluxing technique, have been developed in order to reduce nucleation sites and to produce high undercoolings for metals and alloys. In this work the fluxing technique was applied to Pb-25wt%Sn (hypoeutectic), Pb-61.9wt%Sn (eutectic) and Pb-90wt%Sn (hypereutectic) alloys to investigate the influence of the undercooling on the microstructure of these alloys. For the hypoeutectic alloy, an increasing of the undercooling (DTe) from 7 to 13 K resulted in interdendritic eutectic refinement. For the hypereutectic alloy, an increasing of undercooling from 8 to 16 K resulted in a reduction of the b-Sn primary dendrites arm spacing from 50 m to 30 m. For the both hypoeutectic and eutectic alloys, an increasing of the undercooling resulted in an interdendritic eutectic with anomalous morphology. The results indicated that the critical eutectic undercooling, DTe*, that causes a transition from lamellar eutectic to anomalous eutectic in the Pb-Sn alloys, is around 6 K |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería de materiales, Ingeniería química, Propiedades fisicoquímicas, Aleaciones, Eutéctico, Enfriamiento, Microestructuras |
| Keyword: | Engineering, Chemical engineering, Materials engineering, Physicochemical properties, Alloys, Eutectic, Cooling, Microstructures |
| Texto completo: | Texto completo (Ver HTML) |
