Microstructure and magnetic properties of PrFeCoBnB sintered magnets produced from HD and HDDR powders
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Sintered magnets have been produced with powder obtained using the hydrogenation,
disproportionation, desorption and recombination process (HDDR). The new processing procedure
for the production of the sintered magnets has been adopted in an attempt to reduce the milling
time. Commercial cast ingot alloys based on the compositions Pr14Fe75.9Co4B6Nb0.1 and
Pr20.5FebalB5Cu2.0 have been employed in this investigation. The HDDR powder was used to
produce sintered magnets using a mixture of these alloys, in very distinct proportions. Only a small
amount (20 wt. %) of the copper-containing alloy has been added as a sintering aid. Standard
hydrogen decrepitation (HD) magnets have also been included in this work for a comparison. The
effect of a reduced milling time on the magnetic properties of the HDDR sintered magnets has been
investigated. Sintering temperature and time of were kept constant for all magnets (1050ºC for 60
minutes). The microstructures of the permanent magnets have been investigated by scanning
electron microscopy and energy dispersive X-ray analysis.
Como referenciar
FERREIRA, E.A.; SILVA, S.C.; PERIGO, E.A.; FARIA, R.N.; TAKIISHI, H. Microstructure and magnetic properties of PrFeCoBnB sintered magnets produced from HD and HDDR powders. Materials Science Forum, v. 591-593, p. 885-890, 2008. DOI: 10.4028/www.scientific.net/MSF.591-593.885. Disponível em: http://repositorio.ipen.br/handle/123456789/4932. Acesso em: 24 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.