Coercivities of hot-deformed magnets processed from amorphous and nanocrystalline precursors

Xin Tang; H. Sepehri-Amin; T. Ohkubo; K. Hioki; A. Hattori; K. Hono

doi:10.1016/j.actamat.2016.10.026

Coercivities of hot-deformed magnets processed from amorphous and nanocrystalline precursors

Xin Tang, H. Sepehri-Amin, T. Ohkubo, K. Hioki, A. Hattori, K. Hono

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

34 Citations (Scopus)

Abstract

Hot-deformed magnets have been processed from amorphous and nanocrystalline precursors and their hard magnetic properties and microstructures have been investigated in order to explore the optimum process route. The hot-deformed magnets processed from an amorphous precursor exhibited the coercivity of 1.40 T that is higher than that processed from nanocrystalline powder, ∼1.28 T. The average grain size was larger in the magnets processed from amorphous precursor. Detailed microstructure analyses by aberration corrected scanning transmission electron microscopy revealed that the Nd + Pr concentrations in the intergranular phases were higher in the hot-deformed magnet processed from the amorphous precursor, which is considered to lead to the enhanced coercivity due to a stronger pinning force against magnetic domain wall motion.

Original language	English
Pages (from-to)	1-10
Number of pages	10
Journal	Acta Materialia
Volume	123
DOIs	https://doi.org/10.1016/j.actamat.2016.10.026
Publication status	Published - 2017 Jan 15
Externally published	Yes

Keywords

Coercivity
Hot deformation
Meltspinning
Nd-Fe-B
Permanent magnet

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2016.10.026

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title = "Coercivities of hot-deformed magnets processed from amorphous and nanocrystalline precursors",

abstract = "Hot-deformed magnets have been processed from amorphous and nanocrystalline precursors and their hard magnetic properties and microstructures have been investigated in order to explore the optimum process route. The hot-deformed magnets processed from an amorphous precursor exhibited the coercivity of 1.40 T that is higher than that processed from nanocrystalline powder, ∼1.28 T. The average grain size was larger in the magnets processed from amorphous precursor. Detailed microstructure analyses by aberration corrected scanning transmission electron microscopy revealed that the Nd + Pr concentrations in the intergranular phases were higher in the hot-deformed magnet processed from the amorphous precursor, which is considered to lead to the enhanced coercivity due to a stronger pinning force against magnetic domain wall motion.",

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author = "Xin Tang and H. Sepehri-Amin and T. Ohkubo and K. Hioki and A. Hattori and K. Hono",

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AU - Tang, Xin

AU - Sepehri-Amin, H.

AU - Ohkubo, T.

AU - Hioki, K.

AU - Hattori, A.

AU - Hono, K.

PY - 2017/1/15

Y1 - 2017/1/15

N2 - Hot-deformed magnets have been processed from amorphous and nanocrystalline precursors and their hard magnetic properties and microstructures have been investigated in order to explore the optimum process route. The hot-deformed magnets processed from an amorphous precursor exhibited the coercivity of 1.40 T that is higher than that processed from nanocrystalline powder, ∼1.28 T. The average grain size was larger in the magnets processed from amorphous precursor. Detailed microstructure analyses by aberration corrected scanning transmission electron microscopy revealed that the Nd + Pr concentrations in the intergranular phases were higher in the hot-deformed magnet processed from the amorphous precursor, which is considered to lead to the enhanced coercivity due to a stronger pinning force against magnetic domain wall motion.

AB - Hot-deformed magnets have been processed from amorphous and nanocrystalline precursors and their hard magnetic properties and microstructures have been investigated in order to explore the optimum process route. The hot-deformed magnets processed from an amorphous precursor exhibited the coercivity of 1.40 T that is higher than that processed from nanocrystalline powder, ∼1.28 T. The average grain size was larger in the magnets processed from amorphous precursor. Detailed microstructure analyses by aberration corrected scanning transmission electron microscopy revealed that the Nd + Pr concentrations in the intergranular phases were higher in the hot-deformed magnet processed from the amorphous precursor, which is considered to lead to the enhanced coercivity due to a stronger pinning force against magnetic domain wall motion.

KW - Coercivity

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KW - Meltspinning

KW - Nd-Fe-B

KW - Permanent magnet

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Coercivities of hot-deformed magnets processed from amorphous and nanocrystalline precursors

Abstract

Keywords

ASJC Scopus subject areas

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