| Revista: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312731 |
| ISSN: | 1516-1439 |
| Autors: | Lourenco, Jorge Magner1 Maliska, Ana Maria2 Klein, Aloisio Nelmo Muzart, Joel Louis Rene |
| Institucions: | 1Centro Federal de Educacao Tecnologica, Natal, Rio Grande do Norte. Brasil 2Universidade Federal de Santa Catarina, Departamento de Engenharia Mecanica, Florianopolis, Santa Catarina. Brasil |
| Any: | 2004 |
| Període: | Abr-Jun |
| Volum: | 7 |
| Número: | 2 |
| Paginació: | 269-275 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | Samples of unalloyed iron powder were compacted and sintered in an abnormal glow discharge, generated in a gas mixture of 80% Ar + 20% H2 by using a pulsed power source. The samples were placed on a holder, acting as the discharge cathode, and were heated by the bombardment of ions, strongly accelerated in the cathode sheath. Sintering was performed at temperatures of 1173, 1273 and 1373 K for 30 min, varying the voltage applied to the cathode from 400 to 700 V and pressure ranging from 470 to 2650 Pa. It is shown that the kinetic energy of ions striking the sample surface increased approximately three times, when the voltage changed from 400 to 700 V, with a corresponding reduction of surface porosity. The surface sealing is related to the ion bombardment, which produced a high mobility of surface atoms and consequent enhanced diffusion as well as sputtering and condensation on the concave surface, resulting in an activation of surface sintering |
| Disciplines | Ingeniería, Física y astronomía |
| Paraules clau: | Ingeniería mecánica, Ingeniería metalúrgica, Teoría cinética y plasmas, Hierro, Sinterización, Porosidad, Tratamiento térmico |
| Keyword: | Engineering, Physics and astronomy, Mechanical engineering, Metallurgical engineering, Kinetic theory and plasma, Iron, Sintering, Porosity, Thermal treatment |
| Text complet: | Texto completo (Ver HTML) |
