High performance RFeCoZrB bonded magnets having low Nd content

Yoneyama, T.; Nakamura, Hajime; Anan, Kenichi; Nishiuchi, A.; Fukuno, A.

doi:10.1109/20.104583

Cited by 8 publications

(1 citation statement)

References 2 publications

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“…They reported an increase in remanence and a decrease in intrinsic coercivity for material containing an increasing weight percentage of the Fe 70 Co 30 soft phase and, for material containing the α-Fe soft phase, Nb addition is useful in controlling the grain size of the soft magnetic phase. The addition of Zr has been shown to be advantageous in improving the energy product and squareness of the hysteresis loop in melt-spun isotropic magnets containing a lower Nd content than that of stoichiometric Nd 2 Fe 14 B [14].…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of nanocomposite and materials with an excess of Fe

Jurczyk

Collocott

Dunlop

et al. 1996

J. Phys. D: Appl. Phys.

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Two-phase nanocomposite materials have been prepared by high-energy ball-milling (HEBM) (2:14:1 phase) (u = 0, 0.75, 1.5 or 3.0; y = 0 or 11.6 and z = 0 or 0.5) or (1:12 phase), with excess Fe and then annealing. Magnetic properties of materials containing volume fractions of up to 75% of a magnetically soft Fe phase have been investigated and remanence enhancement observed. Optimum magnetic properties are obtained for materials with a volume fraction of a magnetically soft phase of 37 - 40%; for -Fe powders a remanent magnetic polarization of 1.05 T and intrinsic coercivity of ; and for -Fe powders a remanent magnetic polarization of 0.85 T and intrinsic coercivity of . For Co-containing alloys, evidence was observed for the redistribution of Co in the HEBM process, resulting in a magnetically soft Fe(Co) phase. The magnetic properties of isotropic -Fe and -Fe type magnets, compacted by hot pressing, are reported.

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Section: Introductionmentioning

confidence: 99%

Magnetic properties of nanocomposite and materials with an excess of Fe

Jurczyk

Collocott

Dunlop

et al. 1996

J. Phys. D: Appl. Phys.

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Nanocomposite Nd2(Fe,Co,Cr)14B/α-Fe materials

Jurczyk

Jakubowicz

1998

Journal of Magnetism and Magnetic Materials

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Investigation of high saturation magnetization of low rare-earth content α-Fe/Nd2Fe14B bulk exchange-spring magnets

Ono

Tayu

Waki

et al. 2003

Journal of Applied Physics

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An investigation was made of the magnetic properties of Nd–Fe–Co–V bulk exchange-spring magnets fabricated by spark plasma sintering and consisting of a hard Nd2Fe14B phase and a soft α-Fe phase and having a low rare-earth content of Nd=2–7 at. %. The high saturation magnetization of the bulk exchange-spring magnets was confirmed experimentally, and the measured data agreed well with the saturation magnetization values estimated from their respective rare-earth content. The saturation magnetization values were nearly uniform and were not dependent on changes in the grain size. Additionally, the specific resistance of the samples nearly coincided with the values interpolated from the specific resistances of an ordinary sintered pure Fe bulk compact and a sintered Nd–Fe–B magnet. These results suggest that the α-Fe/Nd2Fe14B bulk exchange-spring magnets did not contain any appreciable grain boundary phase between the fine nanoscale-size grains or tertiary phase.

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High performance RFeCoZrB bonded magnets having low Nd content

Cited by 8 publications

References 2 publications

Magnetic properties of nanocomposite and materials with an excess of Fe

Magnetic properties of nanocomposite and materials with an excess of Fe

Nanocomposite Nd2(Fe,Co,Cr)14B/α-Fe materials

Investigation of high saturation magnetization of low rare-earth content α-Fe/Nd2Fe14B bulk exchange-spring magnets

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