Development of Nd-Fe-B Anisotropic Bonded Magnet With 27 MGOe

N. Hamada; C. Mishima; H. Mitarai; Y. Honkura

doi:10.1109/TMAG.2003.815757

Development of Nd-Fe-B Anisotropic Bonded Magnet With 27 MGOe

N. Hamada, C. Mishima, H. Mitarai, Y. Honkura

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

38 Citations (Scopus)

Abstract

The maximum energy product of bonded magnets is advancing every year. The highest maximum energy product of any bonded magnet achieved is 25 MGOe (200 kJ/m³) in the Nd-Fe-B system by d-HDDR treatment. There is a great demand for even higher energy bonded magnets with the desire for smaller, more efficient electric motors. Bonded magnets made from d-HDDR treated anisotropic magnet powder have low squareness due to low squareness of the powder. The authors developed a method to increase squareness of d-HDDR powder, and succeeded in developing the world's highest energy bonded magnet with 26.6 MGOe (213 kJ/m³). This was achieved through Dy-diffusion treatment followed by d-HDDR treatment, as well as an increase in the density of the bonded magnet. This magnet has little aging loss after being held at 393 K for 878 h.

Original language	English
Pages (from-to)	2953-2955
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	39
Issue number	5 II
DOIs	https://doi.org/10.1109/TMAG.2003.815757
Publication status	Published - 2003 Sept
Externally published	Yes

Keywords

Anisotropic bonded magnet
D-HDDR treatment
Dysprosium
NdFeB

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2003.815757

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title = "Development of Nd-Fe-B Anisotropic Bonded Magnet With 27 MGOe",

abstract = "The maximum energy product of bonded magnets is advancing every year. The highest maximum energy product of any bonded magnet achieved is 25 MGOe (200 kJ/m3) in the Nd-Fe-B system by d-HDDR treatment. There is a great demand for even higher energy bonded magnets with the desire for smaller, more efficient electric motors. Bonded magnets made from d-HDDR treated anisotropic magnet powder have low squareness due to low squareness of the powder. The authors developed a method to increase squareness of d-HDDR powder, and succeeded in developing the world's highest energy bonded magnet with 26.6 MGOe (213 kJ/m3). This was achieved through Dy-diffusion treatment followed by d-HDDR treatment, as well as an increase in the density of the bonded magnet. This magnet has little aging loss after being held at 393 K for 878 h.",

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AU - Hamada, N.

AU - Mishima, C.

AU - Mitarai, H.

AU - Honkura, Y.

PY - 2003/9

Y1 - 2003/9

N2 - The maximum energy product of bonded magnets is advancing every year. The highest maximum energy product of any bonded magnet achieved is 25 MGOe (200 kJ/m3) in the Nd-Fe-B system by d-HDDR treatment. There is a great demand for even higher energy bonded magnets with the desire for smaller, more efficient electric motors. Bonded magnets made from d-HDDR treated anisotropic magnet powder have low squareness due to low squareness of the powder. The authors developed a method to increase squareness of d-HDDR powder, and succeeded in developing the world's highest energy bonded magnet with 26.6 MGOe (213 kJ/m3). This was achieved through Dy-diffusion treatment followed by d-HDDR treatment, as well as an increase in the density of the bonded magnet. This magnet has little aging loss after being held at 393 K for 878 h.

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KW - Anisotropic bonded magnet

KW - D-HDDR treatment

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KW - NdFeB

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Development of Nd-Fe-B Anisotropic Bonded Magnet With 27 MGOe

Abstract

Keywords

ASJC Scopus subject areas

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