PrFeB based alloys obtained by melt spinning for the production of permanent magnets
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2020
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Materials Science Forum
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Resumo
Rare earth permanent magnets are essential components in many fields of technology due
to their excellent magnetic properties. There are some techniques used in the manufacture of
permanent rare earth magnets: the powder metallurgy to obtain anisotropic HD sintered permanent
magnets and the melt spinning and HDDR processes to obtain isotropic and anisotropic bonded
permanent magnets. In this work, the influence of the melt spinning parameters on the
microstructural and magnetic properties of the Pr14FebalCo16B6 alloy was studied. The alloy was
melted and rapidly cooled at 9.9 x 105°C/s. The parameters used in the process were: wheel speed
of 15 m/s and 20 m/s and ejection pressure of 25.3 kPa and 50.7 kPa. Ribbons and/or flakes of
30 μm thickness and width until 5 mm were obtained. Results show that the melt spinning alloys are
nanocrystalline and that the parameters of the process influence the microstructure and their
magnetic properties. Mean crystallite size up to 38.5 nm and intrinsic coercivity (iHc) up to
254 kA/m were obtained.
Como referenciar
MEIRA, MARCO A.; MOISES, LUCAS C.; SILVA, MELISSA R.M. da; JANASI, SUZILENE R.; TAKIISHI, HIDETOSHI. PrFeB based alloys obtained by melt spinning for the production of permanent magnets. Materials Science Forum, v. 1012, p. 314-318, 2020. DOI: 10.4028/www.scientific.net/MSF.1012.314. Disponível em: http://repositorio.ipen.br/handle/123456789/31831. Acesso em: 19 Apr 2024.
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