Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

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

doi:10.1016/j.scriptamat.2017.12.032

Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

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

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

16 Citations (Scopus)

Abstract

0.2 at.%Nb doping to a Nd_12.83Fe_76.7Co_4.50Ga_0.53B_5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd₂Fe₁₄B grains and increasing coercivity.

Original language	English
Pages (from-to)	108-113
Number of pages	6
Journal	Scripta Materialia
Volume	147
DOIs	https://doi.org/10.1016/j.scriptamat.2017.12.032
Publication status	Published - 2018 Apr 1
Externally published	Yes

Keywords

Coercivity
Hot-deformed magnet
Nd-Fe-B
Permanent magnet
Remanence

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.12.032

Cite this

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title = "Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping",

abstract = "0.2 at.%Nb doping to a Nd12.83Fe76.7Co4.50Ga0.53B5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd2Fe14B grains and increasing coercivity.",

keywords = "Coercivity, Hot-deformed magnet, Nd-Fe-B, Permanent magnet, Remanence",

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

note = "Funding Information: This work was in part supported by JST, Collaborative Research Based on Industrial Demand. Publisher Copyright: {\textcopyright} 2018 Acta Materialia Inc.",

year = "2018",

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doi = "10.1016/j.scriptamat.2017.12.032",

language = "English",

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TY - JOUR

T1 - Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

AU - Tang, Xin

AU - Sepehri-Amin, H.

AU - Ohkubo, T.

AU - Hono, K.

PY - 2018/4/1

Y1 - 2018/4/1

N2 - 0.2 at.%Nb doping to a Nd12.83Fe76.7Co4.50Ga0.53B5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd2Fe14B grains and increasing coercivity.

AB - 0.2 at.%Nb doping to a Nd12.83Fe76.7Co4.50Ga0.53B5.44 alloy suppress the surface crystallization in melt-spun ribbon, thereby suppressing the formation of non-oriented grains during the hot-deformation process to form bulk anisotropic magnet, which leads to the enhancement of remanence. High resolution transmission electron microscopy and three-dimension atom probe tomography revealed that the segregation of Nb at the grain boundaries hinders the grain growth during the hot-deformation process, thereby reducing the size and the aspect ratio of Nd2Fe14B grains and increasing coercivity.

KW - Coercivity

KW - Hot-deformed magnet

KW - Nd-Fe-B

KW - Permanent magnet

KW - Remanence

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DO - 10.1016/j.scriptamat.2017.12.032

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EP - 113

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -

Suppression of non-oriented grains in Nd-Fe-B hot-deformed magnets by Nb doping

Abstract

Keywords

ASJC Scopus subject areas

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