Coercivity enhancement of anisotropic Dy-free Nd-Fe-B powders by conventional HDDR process

K. Morimoto; N. Katayama; H. Akamine; M. Itakura

doi:10.1016/j.jmmm.2012.06.003

Coercivity enhancement of anisotropic Dy-free Nd-Fe-B powders by conventional HDDR process

K. Morimoto, N. Katayama, H. Akamine, M. Itakura

Materials Physics and Engineering

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

Coercivity enhancement of Dy-free Nd-Fe-Co-B-Ga-Zr powders was studied using the conventional hydrogenation-decomposition-desorption-recombination (HDDR) process. It was found that the addition of Al together with the proper Nd content and the slow hydrogen desorption of the HDDR treatment can induce high coercivity in the powder. For example, the 14.0 at% Nd-2.0 at% Al powder exhibits H _cJ of 1560 kA/m, B _r of 1.22 T, and (BH) _max of 257 kJ/m ³. The high coercivity inducement of the powder is thought to be attributed to the formation of Nd-rich phase, which continuously surrounds fine Nd ₂Fe ₁₄B grains.

Original language	English
Pages (from-to)	3723-3726
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	324
Issue number	22
DOIs	https://doi.org/10.1016/j.jmmm.2012.06.003
Publication status	Published - Nov 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2012.06.003

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title = "Coercivity enhancement of anisotropic Dy-free Nd-Fe-B powders by conventional HDDR process",

abstract = "Coercivity enhancement of Dy-free Nd-Fe-Co-B-Ga-Zr powders was studied using the conventional hydrogenation-decomposition-desorption-recombination (HDDR) process. It was found that the addition of Al together with the proper Nd content and the slow hydrogen desorption of the HDDR treatment can induce high coercivity in the powder. For example, the 14.0 at% Nd-2.0 at% Al powder exhibits H cJ of 1560 kA/m, B r of 1.22 T, and (BH) max of 257 kJ/m 3. The high coercivity inducement of the powder is thought to be attributed to the formation of Nd-rich phase, which continuously surrounds fine Nd 2Fe 14B grains.",

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T1 - Coercivity enhancement of anisotropic Dy-free Nd-Fe-B powders by conventional HDDR process

AU - Morimoto, K.

AU - Katayama, N.

AU - Akamine, H.

AU - Itakura, M.

PY - 2012/11

Y1 - 2012/11

N2 - Coercivity enhancement of Dy-free Nd-Fe-Co-B-Ga-Zr powders was studied using the conventional hydrogenation-decomposition-desorption-recombination (HDDR) process. It was found that the addition of Al together with the proper Nd content and the slow hydrogen desorption of the HDDR treatment can induce high coercivity in the powder. For example, the 14.0 at% Nd-2.0 at% Al powder exhibits H cJ of 1560 kA/m, B r of 1.22 T, and (BH) max of 257 kJ/m 3. The high coercivity inducement of the powder is thought to be attributed to the formation of Nd-rich phase, which continuously surrounds fine Nd 2Fe 14B grains.

AB - Coercivity enhancement of Dy-free Nd-Fe-Co-B-Ga-Zr powders was studied using the conventional hydrogenation-decomposition-desorption-recombination (HDDR) process. It was found that the addition of Al together with the proper Nd content and the slow hydrogen desorption of the HDDR treatment can induce high coercivity in the powder. For example, the 14.0 at% Nd-2.0 at% Al powder exhibits H cJ of 1560 kA/m, B r of 1.22 T, and (BH) max of 257 kJ/m 3. The high coercivity inducement of the powder is thought to be attributed to the formation of Nd-rich phase, which continuously surrounds fine Nd 2Fe 14B grains.

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Coercivity enhancement of anisotropic Dy-free Nd-Fe-B powders by conventional HDDR process

Abstract

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