Magnetic and microstructural characteristics of Nd-Fe-B sintered magnets doped with Dy2O3 and DyF3 powders

Song E. Park; Tae Hoon Kim; Seong Rae Lee; Dong Hwan Kim; Seok Nam-Kung; Tae Suk Jang

doi:10.1109/TMAG.2011.2153833

Magnetic and microstructural characteristics of Nd-Fe-B sintered magnets doped with Dy₂O₃ and DyF₃ powders

Song E. Park, Tae Hoon Kim, Seong Rae Lee, Dong Hwan Kim, Seok Nam-Kung, Tae Suk Jang

Department of Materials Science and Engineering

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

33 Citations (Scopus)

Abstract

Magnetic and microstructural properties of (Nd_26.06, Dy _6.51)-Fe_bal.-B_0.97-M_2.39 (wt.%) (M = Cu, Al, Co, and Nb) sintered magnets doped with Dy₂ O₃ and DyF₃ powders were studied. In the case of the Dy ₂O₃-doped magnet, Dy was distributed along the near grain boundaries. In contrast, the DyF₃-doped magnet and the undoped magnet showed that Dy was distributed uniformly in the main phase. The coercivity and the remanence of the Dy₂ O₃ and DyF₃ -doped magnets were 33.2 kOe, 11.64 kG, and 34.5 kOe, 11.21 kG, respectively. The coercivity of the DyF₃-doped magnet was the largest but its remanence was the smallest among other magnets because the Dy was distributed throughout the main phase. Uniform distribution of the Dy in the DyF₃-doped magnet was probably due to their lower bonding energy and higher chemical potential for diffusion.

Original language	English
Article number	6027997
Pages (from-to)	3259-3262
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2011.2153833
Publication status	Published - 2011 Oct

Keywords

Nd-Fe-B sintered magnets
magnetic property
microstructure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2011.2153833

Cite this

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title = "Magnetic and microstructural characteristics of Nd-Fe-B sintered magnets doped with Dy2O3 and DyF3 powders",

abstract = "Magnetic and microstructural properties of (Nd26.06, Dy 6.51)-Febal.-B0.97-M2.39 (wt.%) (M = Cu, Al, Co, and Nb) sintered magnets doped with Dy2 O3 and DyF3 powders were studied. In the case of the Dy 2O3-doped magnet, Dy was distributed along the near grain boundaries. In contrast, the DyF3-doped magnet and the undoped magnet showed that Dy was distributed uniformly in the main phase. The coercivity and the remanence of the Dy2 O3 and DyF3 -doped magnets were 33.2 kOe, 11.64 kG, and 34.5 kOe, 11.21 kG, respectively. The coercivity of the DyF3-doped magnet was the largest but its remanence was the smallest among other magnets because the Dy was distributed throughout the main phase. Uniform distribution of the Dy in the DyF3-doped magnet was probably due to their lower bonding energy and higher chemical potential for diffusion.",

keywords = "Nd-Fe-B sintered magnets, magnetic property, microstructure",

author = "Park, {Song E.} and Kim, {Tae Hoon} and Lee, {Seong Rae} and Kim, {Dong Hwan} and Seok Nam-Kung and Jang, {Tae Suk}",

note = "Funding Information: This work was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Commerce, Industry and Energy, Republic of Korea and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0007200)",

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AU - Park, Song E.

AU - Kim, Tae Hoon

AU - Lee, Seong Rae

AU - Kim, Dong Hwan

AU - Nam-Kung, Seok

AU - Jang, Tae Suk

N1 - Funding Information: This work was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Commerce, Industry and Energy, Republic of Korea and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0007200)

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AB - Magnetic and microstructural properties of (Nd26.06, Dy 6.51)-Febal.-B0.97-M2.39 (wt.%) (M = Cu, Al, Co, and Nb) sintered magnets doped with Dy2 O3 and DyF3 powders were studied. In the case of the Dy 2O3-doped magnet, Dy was distributed along the near grain boundaries. In contrast, the DyF3-doped magnet and the undoped magnet showed that Dy was distributed uniformly in the main phase. The coercivity and the remanence of the Dy2 O3 and DyF3 -doped magnets were 33.2 kOe, 11.64 kG, and 34.5 kOe, 11.21 kG, respectively. The coercivity of the DyF3-doped magnet was the largest but its remanence was the smallest among other magnets because the Dy was distributed throughout the main phase. Uniform distribution of the Dy in the DyF3-doped magnet was probably due to their lower bonding energy and higher chemical potential for diffusion.

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