A study of high-energy milling for the production of sintered PrFeB magnets
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Sintered Pr16Fe76B8
magnets have been produced using the hydrogen decrepitation (HD) process and highenergy planetary ball milling. Investigations have been carried out to evaluate the influence of the milling speed
and time. The best magnetic properties obtained were Br
= (1020 ± 20) mT, µ0iHc
= (1420 ± 30) mT and (BH)max =
(200 ± 4) kJm-3, for a magnet prepared with the alloy milled at 200 rpm for 4.5 ks. Magnets prepared from this
powder exhibited a superior intrinsic coercivity compared to that of magnets produced using low-energy ball
milling. However, the remanence and energy product of the latter were somewhat lower. An important feature
was the dramatic reduction in the processing time (about 90%). Microstructural observation have shown that
increasing the milling time and keeping constant the rotational mill speed caused an exponential grain size
reduction in the sintered magnet. Increasing the milling speed also reduced the grain size and influenced both
remanence and intrinsic coercivity
Como referenciar
PERIGO, ELIO A.; SOARES, EDSON P.; LEAL NETO, RICARDO M.; MOTTA, CLAUDIO C.; FARIA JUNIOR, RUBENS N. de. A study of high-energy milling for the production of sintered PrFeB magnets. Materials Research, v. 10, n. 3, p. 311-314, 2007. DOI: 10.1590/S1516-14392007000300018. Disponível em: http://repositorio.ipen.br/handle/123456789/5153. Acesso em: 20 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.