Magnetic Properties of Nanocomposite Nd2xFe 95-3xCo4Nb1Bx (x=4-6)Ribbons

Yi-Zhong Wang; Ji-Fan Hu; Zhao-Yin Zhang; Hong-Wei Zhang; Bao-Gan Shen; Bo-Ping Hu

doi:10.3379/jmsjmag.23.285

Chapter 4. Hard Magnets

Magnetic Properties of Nanocomposite Nd_2xFe _95-3xCo₄Nb₁B_x (x=4-6)Ribbons

Yi-Zhong Wang, Ji-Fan Hu, Zhao-Yin Zhang, Hong-Wei Zhang, Bao-Gan Shen, Bo-Ping Hu

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Keywords: nanocomposite, exchange coupling, hard magnetic material, Nd₂Fe₁₄B, α-Fe, remanence enhancement, Curie temperature enhancement, coercivity hysteresis loops

JOURNAL OPEN ACCESS

1999 Volume 23 Issue 1_2 Pages 285-287

DOI https://doi.org/10.3379/jmsjmag.23.285

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Abstract

The melt spun ribbons of two-phase nanocomposite Nd_2xFe _95-2xCo₄Nb₁B_x(x = 4-6) have been prepared by rapid quenching and post heat treatment. The effect of exchange coupling between the nanostructure grains of Nd₂(Fe, Co, Nb)₁₄B and α-Fe(Co, Nb) are observed clearly. The sample with x = 4 has both the highest Curie temperature enhancement (about 10 K) and the largest remanence enhancement. The sample with x = 6 has the highest coercivity (about 1.31 T). The best magnetic properties obtained in Nd₉Fe_81.5Co₄Nb₁B_4.5 ribbons are as follows: (BH)_max=154.4 kJ/m³, J_r= 1.11 T and μ₀H_cj=0.65 T.

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