Microstructure evolution and coercivity enhancement in hot-deformed Nd-Fe-B magnet processed by Pr60Tb10Cu30 diffusion

Tieqiao Zhang; Zhongwei Wu; Rong Yu

doi:10.1016/j.jallcom.2024.174338

Microstructure evolution and coercivity enhancement in hot-deformed Nd-Fe-B magnet processed by Pr₆₀Tb₁₀Cu₃₀ diffusion

Tieqiao Zhang^*
, Zhongwei Wu
, Rong Yu

^*Corresponding author for this work

Wuzhen Laboratory
Tsinghua University

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

5 Scopus citations

Abstract

The grain boundary diffusion process with Pr₆₀Tb₁₀Cu₃₀ alloy was used to improve the microstructure and coercivity of the hot-deformed Nd-Fe-B magnet. The crystalline intergranular phases consisting of (Pr,Nd)₅Ga₃, (Pr,Nd)₃Co, PrCu and (Nd,Pr)₆Fe₁₃Ga were observed in the Pr₆₀Tb₁₀Cu₃₀ diffused magnet. Apparent (Nd,Tb)₂Fe₁₄B shell layer on the surface of Nd₂Fe₁₄B grains near the triple junctions of the magnet was observed after grain boundary diffusion. The formation of many non-ferromagnetic intergranular phases and Nd₂Fe₁₄B/(Nd,Tb)₂Fe₁₄B core-shell structure contributes to the significant increase of coercivity from 1.21 T to 2.7 T and the improvement of temperature coefficient of coercivity from −0.469%/℃ to −0.356%/℃.

Original language	English
Article number	174338
Journal	Journal of Alloys and Compounds
Volume	990
DOIs	https://doi.org/10.1016/j.jallcom.2024.174338
State	Published - 30 Jun 2024
Externally published	Yes

Keywords

Coercivity
Core-shell structure
Decomposition behavior
Hot-deformed Nd-Fe-B
Nd(Fe,Co)Ga

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10.1016/j.jallcom.2024.174338

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@article{daf66c5972394d3d9e62909b59ed915a,

title = "Microstructure evolution and coercivity enhancement in hot-deformed Nd-Fe-B magnet processed by Pr60Tb10Cu30 diffusion",

abstract = "The grain boundary diffusion process with Pr60Tb10Cu30 alloy was used to improve the microstructure and coercivity of the hot-deformed Nd-Fe-B magnet. The crystalline intergranular phases consisting of (Pr,Nd)5Ga3, (Pr,Nd)3Co, PrCu and (Nd,Pr)6Fe13Ga were observed in the Pr60Tb10Cu30 diffused magnet. Apparent (Nd,Tb)2Fe14B shell layer on the surface of Nd2Fe14B grains near the triple junctions of the magnet was observed after grain boundary diffusion. The formation of many non-ferromagnetic intergranular phases and Nd2Fe14B/(Nd,Tb)2Fe14B core-shell structure contributes to the significant increase of coercivity from 1.21 T to 2.7 T and the improvement of temperature coefficient of coercivity from −0.469\%/℃ to −0.356\%/℃.",

keywords = "Coercivity, Core-shell structure, Decomposition behavior, Hot-deformed Nd-Fe-B, Nd(Fe,Co)Ga",

author = "Tieqiao Zhang and Zhongwei Wu and Rong Yu",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = jun,

day = "30",

doi = "10.1016/j.jallcom.2024.174338",

language = "英语",

volume = "990",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Microstructure evolution and coercivity enhancement in hot-deformed Nd-Fe-B magnet processed by Pr60Tb10Cu30 diffusion

AU - Zhang, Tieqiao

AU - Wu, Zhongwei

AU - Yu, Rong

PY - 2024/6/30

Y1 - 2024/6/30

N2 - The grain boundary diffusion process with Pr60Tb10Cu30 alloy was used to improve the microstructure and coercivity of the hot-deformed Nd-Fe-B magnet. The crystalline intergranular phases consisting of (Pr,Nd)5Ga3, (Pr,Nd)3Co, PrCu and (Nd,Pr)6Fe13Ga were observed in the Pr60Tb10Cu30 diffused magnet. Apparent (Nd,Tb)2Fe14B shell layer on the surface of Nd2Fe14B grains near the triple junctions of the magnet was observed after grain boundary diffusion. The formation of many non-ferromagnetic intergranular phases and Nd2Fe14B/(Nd,Tb)2Fe14B core-shell structure contributes to the significant increase of coercivity from 1.21 T to 2.7 T and the improvement of temperature coefficient of coercivity from −0.469%/℃ to −0.356%/℃.

AB - The grain boundary diffusion process with Pr60Tb10Cu30 alloy was used to improve the microstructure and coercivity of the hot-deformed Nd-Fe-B magnet. The crystalline intergranular phases consisting of (Pr,Nd)5Ga3, (Pr,Nd)3Co, PrCu and (Nd,Pr)6Fe13Ga were observed in the Pr60Tb10Cu30 diffused magnet. Apparent (Nd,Tb)2Fe14B shell layer on the surface of Nd2Fe14B grains near the triple junctions of the magnet was observed after grain boundary diffusion. The formation of many non-ferromagnetic intergranular phases and Nd2Fe14B/(Nd,Tb)2Fe14B core-shell structure contributes to the significant increase of coercivity from 1.21 T to 2.7 T and the improvement of temperature coefficient of coercivity from −0.469%/℃ to −0.356%/℃.

KW - Coercivity

KW - Core-shell structure

KW - Decomposition behavior

KW - Hot-deformed Nd-Fe-B

KW - Nd(Fe,Co)Ga

UR - https://www.scopus.com/pages/publications/85190064511

U2 - 10.1016/j.jallcom.2024.174338

DO - 10.1016/j.jallcom.2024.174338

M3 - 文章

AN - SCOPUS:85190064511

SN - 0925-8388

VL - 990

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 174338

ER -

Microstructure evolution and coercivity enhancement in hot-deformed Nd-Fe-B magnet processed by Pr₆₀Tb₁₀Cu₃₀ diffusion

Abstract

Keywords

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