The effect of reduced graphene oxide on the microstructure, magnetic properties, and corrosion resistance of NdFeB magnets
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2024
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BRAZIL MRS MEETING, 22nd
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This work investigates the effect of adding reduced graphene oxide (rGO) as a milling agent
on NdFeB magnets' microstructure, magnetic properties, and corrosion resistance. RGO
was incorporated into NdFeB powder via mechanical milling for 7, 15, 30, and 45 minutes.
X-ray diffraction (XRD) confirmed the presence of the Nd2Fe14B3.1 phase in all composites.
Transmission electron microscopy (TEM) revealed that rGO adhered to the NdFeB particles
as thin flakes, potentially hindering corrosion. Magnetic characterization showed a
significant improvement in remanence (Br), intrinsic coercivity (iHc), and maximum energy
product (BHmax) for magnets produced with longer milling times (30 and 45 minutes).
Notably, magnet-3 (30 minutes milling) achieved a Br of 1.10 T, iHc of 972.59 kAm⁻¹, and
BHmax of 221.62 kJ m⁻³, exceeding those of other samples and approaching values reported
in the literature [1]. Electrochemical Impedance Spectroscopy (EIS) analysis demonstrated
superior corrosion resistance in magnets fabricated with longer milling durations, likely
attributable to the protective influence of rGO. This research underscores the potential of
utilizing rGO as an environmentally friendly and efficient milling agent to increase the
performance of NdFeB magnets.
Como referenciar
SILVA FILHO, JORGE C.; SILVA, SUELANNY C. da; TAKIISHI, HIDETOSHI; VENANCIO, EVERALDO C.; RANGEL, RITA de C.C.; MEIRA, MARCO; ROMERO, SERGIO A.; ABE, IGOR Y.; REY, JOSE F.G.; ESCOTE, MARCIA T. The effect of reduced graphene oxide on the microstructure, magnetic properties, and corrosion resistance of NdFeB magnets. In: BRAZIL MRS MEETING, 22nd, September 29 - October 3, 2024, Santos, SP. Abstract... São Carlos, SP: Aptor Software, 2024. p. 1203-1203. Disponível em: https://repositorio.ipen.br/handle/123456789/48936. 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.