Magnetic properties of Nd-Fe-B sintered magnet powders sorbed by Yb metal vapor

Takashi Horikawa; Masahiro Itoh; Ken Ichi Machida

doi:10.1143/jjap.42.l741

Magnetic properties of Nd-Fe-B sintered magnet powders sorbed by Yb metal vapor

Takashi Horikawa, Masahiro Itoh, Ken Ichi Machida

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

4 Citations (Scopus)

Abstract

Ground powders of Nd₂Fe₁₄B sintered magnets (particle size = 46-125 μm in diameter) were coated and alloyed by sorbing Yb metal vapor at 550-850°C. A significant recovery of remanence (B _r), coercivity (H_cj and maximum energy product ((BH) _max) values was observed in the resulting Yb/Nd₂Fe ₁₄B powders. The recovered values of 0.98 T, 712kA/m and 173kJ/m ³ for B_r, H_cj and (BH)_max, respectively, were obtained by optimizing the sorption and annealing conditions (800°C for 90min and 610°C for 60 min, respectively). The effects of temperature and sorption time on the magnetic properties of the recovered powders are discussed based on their microstructural characteristics.

Original language	English
Pages (from-to)	L741-L744
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	42
Issue number	7 A
DOIs	https://doi.org/10.1143/jjap.42.l741
Publication status	Published - 2003 Jul 1
Externally published	Yes

Keywords

High-performance permanent magnets
Magnetic properties
Metal vapor sorption
Microstructure
NdFeB
Rare earth magnets
Recovery
Sintered magnets
Yb metal

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/jjap.42.l741

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title = "Magnetic properties of Nd-Fe-B sintered magnet powders sorbed by Yb metal vapor",

abstract = "Ground powders of Nd2Fe14B sintered magnets (particle size = 46-125 μm in diameter) were coated and alloyed by sorbing Yb metal vapor at 550-850°C. A significant recovery of remanence (B r), coercivity (Hcj and maximum energy product ((BH) max) values was observed in the resulting Yb/Nd2Fe 14B powders. The recovered values of 0.98 T, 712kA/m and 173kJ/m 3 for Br, Hcj and (BH)max, respectively, were obtained by optimizing the sorption and annealing conditions (800°C for 90min and 610°C for 60 min, respectively). The effects of temperature and sorption time on the magnetic properties of the recovered powders are discussed based on their microstructural characteristics.",

keywords = "High-performance permanent magnets, Magnetic properties, Metal vapor sorption, Microstructure, NdFeB, Rare earth magnets, Recovery, Sintered magnets, Yb metal",

author = "Takashi Horikawa and Masahiro Itoh and Machida, {Ken Ichi}",

year = "2003",

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doi = "10.1143/jjap.42.l741",

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publisher = "Japan Society of Applied Physics",

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TY - JOUR

T1 - Magnetic properties of Nd-Fe-B sintered magnet powders sorbed by Yb metal vapor

AU - Horikawa, Takashi

AU - Itoh, Masahiro

AU - Machida, Ken Ichi

PY - 2003/7/1

Y1 - 2003/7/1

N2 - Ground powders of Nd2Fe14B sintered magnets (particle size = 46-125 μm in diameter) were coated and alloyed by sorbing Yb metal vapor at 550-850°C. A significant recovery of remanence (B r), coercivity (Hcj and maximum energy product ((BH) max) values was observed in the resulting Yb/Nd2Fe 14B powders. The recovered values of 0.98 T, 712kA/m and 173kJ/m 3 for Br, Hcj and (BH)max, respectively, were obtained by optimizing the sorption and annealing conditions (800°C for 90min and 610°C for 60 min, respectively). The effects of temperature and sorption time on the magnetic properties of the recovered powders are discussed based on their microstructural characteristics.

AB - Ground powders of Nd2Fe14B sintered magnets (particle size = 46-125 μm in diameter) were coated and alloyed by sorbing Yb metal vapor at 550-850°C. A significant recovery of remanence (B r), coercivity (Hcj and maximum energy product ((BH) max) values was observed in the resulting Yb/Nd2Fe 14B powders. The recovered values of 0.98 T, 712kA/m and 173kJ/m 3 for Br, Hcj and (BH)max, respectively, were obtained by optimizing the sorption and annealing conditions (800°C for 90min and 610°C for 60 min, respectively). The effects of temperature and sorption time on the magnetic properties of the recovered powders are discussed based on their microstructural characteristics.

KW - High-performance permanent magnets

KW - Magnetic properties

KW - Metal vapor sorption

KW - Microstructure

KW - NdFeB

KW - Rare earth magnets

KW - Recovery

KW - Sintered magnets

KW - Yb metal

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Magnetic properties of Nd-Fe-B sintered magnet powders sorbed by Yb metal vapor

Abstract

Keywords

ASJC Scopus subject areas

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