Influence of Nb addition and cooling rate on properties of PrFeB alloys produced by melt spinning
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2022
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24.
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Abstract PrFeB permanent magnets are relevant materials in technological applications, like electric
motors, power generators, transductors and wave guides. In order to optimize their properties
some alloy elements, as Nb, are being investigated to improve their microstructures and magnetic
properties by grain size controlling. Furthermore, the rapid cooling by melt spinning can also
improve their microstructures, depending of process parameters. For understand the role of Nb
additions to the starting alloy on the microstructure and magnetic properties of sintered magnets a
study was made varying the Nb content from 0.1% to 0.5% (at.). The influence of melt spinning
parameters was made varying the velocity and leakage pressure. The cell parameters, presence of
free Fe, crystallite sizes and microstrains were investigated by X-ray diffraction employing the
Rietveld Method for the refinement of data. However, it’s necessary to understand why Nb
improves the magnetic properties, were studied different alloys, which Nb varies from 0 to 0.5%
and were made by melt spinning. Being that, the alloy with 0,1 of Nb showed better intrinsic
coercivity of 157 kA m-1 and crystallite size of 54 nm using the Scherrer method, it was also
noticed that there’s no free iron in this alloy.
Como referenciar
FARIA, M.E.; MEIRA, M.A.; TAKIISHI, H.; MARTINEZ, L.G. Influence of Nb addition and cooling rate on properties of PrFeB alloys produced by melt spinning. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24., 6-10 de novembro, 2022, Águas de Lindóia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/33794. Acesso em: 30 Dec 2025.
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.