Recent trend of the researches for reducing dysprosium usage in a Nd-Fe-B sintered magnet

Satoshi Sugimoto

doi:10.2497/jjspm.57.395

Recent trend of the researches for reducing dysprosium usage in a Nd-Fe-B sintered magnet

Satoshi Sugimoto

Research output: Contribution to journal › Review article › peer-review

8 Citations (Scopus)

Abstract

Nd-Fe-B sintered magnets are widely used in many applications and the motor for hybrid electric vehicles (HEV) becomes one of the promising applications for the magnets. However, as the operating temperature of the magnets becomes over 200 °C in the application, a room temperature coercivity around μ₀H_cJ = 3 T is needed. To meet this requirement, currently shipped Nd-Fe-B magnets contain a huge amount of Dy. But, this method has a crucial disadvantage. That is, an estimated short supply of Dy owing to its low natural abundance as compared with that of Nd. In order to realize a high μ₀H_CJ in Nd-Fe-B magnets without Dy or with a much-reduced Dy content, and to secure a stable future supply of these high-performance magnets, a five year national project has started in Japan. This paper introduces unique researches in the project toward Dy-free or Dy-lean Nd-Fe-B sintered magnets.

Original language	English
Pages (from-to)	395-400
Number of pages	6
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	57
Issue number	6
DOIs	https://doi.org/10.2497/jjspm.57.395
Publication status	Published - 2010 Jun
Externally published	Yes

Keywords

Dysprosium
Grain refinement
Interface
Microstructural control
Neodymium-iron-boron

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2497/jjspm.57.395

Cite this

@article{2373f9c6ef5641db88827c537e827ce5,

title = "Recent trend of the researches for reducing dysprosium usage in a Nd-Fe-B sintered magnet",

abstract = "Nd-Fe-B sintered magnets are widely used in many applications and the motor for hybrid electric vehicles (HEV) becomes one of the promising applications for the magnets. However, as the operating temperature of the magnets becomes over 200 °C in the application, a room temperature coercivity around μ0HcJ = 3 T is needed. To meet this requirement, currently shipped Nd-Fe-B magnets contain a huge amount of Dy. But, this method has a crucial disadvantage. That is, an estimated short supply of Dy owing to its low natural abundance as compared with that of Nd. In order to realize a high μ0HCJ in Nd-Fe-B magnets without Dy or with a much-reduced Dy content, and to secure a stable future supply of these high-performance magnets, a five year national project has started in Japan. This paper introduces unique researches in the project toward Dy-free or Dy-lean Nd-Fe-B sintered magnets.",

keywords = "Dysprosium, Grain refinement, Interface, Microstructural control, Neodymium-iron-boron",

author = "Satoshi Sugimoto",

year = "2010",

month = jun,

doi = "10.2497/jjspm.57.395",

language = "English",

volume = "57",

pages = "395--400",

journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

issn = "0532-8799",

publisher = "Funtai Funamtsu Yakin Kyokai/Japan Soc. of Powder Metallurgy",

number = "6",

}

TY - JOUR

T1 - Recent trend of the researches for reducing dysprosium usage in a Nd-Fe-B sintered magnet

AU - Sugimoto, Satoshi

PY - 2010/6

Y1 - 2010/6

N2 - Nd-Fe-B sintered magnets are widely used in many applications and the motor for hybrid electric vehicles (HEV) becomes one of the promising applications for the magnets. However, as the operating temperature of the magnets becomes over 200 °C in the application, a room temperature coercivity around μ0HcJ = 3 T is needed. To meet this requirement, currently shipped Nd-Fe-B magnets contain a huge amount of Dy. But, this method has a crucial disadvantage. That is, an estimated short supply of Dy owing to its low natural abundance as compared with that of Nd. In order to realize a high μ0HCJ in Nd-Fe-B magnets without Dy or with a much-reduced Dy content, and to secure a stable future supply of these high-performance magnets, a five year national project has started in Japan. This paper introduces unique researches in the project toward Dy-free or Dy-lean Nd-Fe-B sintered magnets.

AB - Nd-Fe-B sintered magnets are widely used in many applications and the motor for hybrid electric vehicles (HEV) becomes one of the promising applications for the magnets. However, as the operating temperature of the magnets becomes over 200 °C in the application, a room temperature coercivity around μ0HcJ = 3 T is needed. To meet this requirement, currently shipped Nd-Fe-B magnets contain a huge amount of Dy. But, this method has a crucial disadvantage. That is, an estimated short supply of Dy owing to its low natural abundance as compared with that of Nd. In order to realize a high μ0HCJ in Nd-Fe-B magnets without Dy or with a much-reduced Dy content, and to secure a stable future supply of these high-performance magnets, a five year national project has started in Japan. This paper introduces unique researches in the project toward Dy-free or Dy-lean Nd-Fe-B sintered magnets.

KW - Dysprosium

KW - Grain refinement

KW - Interface

KW - Microstructural control

KW - Neodymium-iron-boron

UR - http://www.scopus.com/inward/record.url?scp=77956330985&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77956330985&partnerID=8YFLogxK

U2 - 10.2497/jjspm.57.395

DO - 10.2497/jjspm.57.395

M3 - Review article

AN - SCOPUS:77956330985

VL - 57

SP - 395

EP - 400

JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

SN - 0532-8799

IS - 6

ER -

Recent trend of the researches for reducing dysprosium usage in a Nd-Fe-B sintered magnet

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this