Coercivity enhancement of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Zn alloy

Shizhong An; Xiaosen Li; Wuhui Li; Fengzhang Ren; Panpan Xu

doi:10.1016/j.matlet.2020.128965

Coercivity enhancement of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Zn alloy

Shizhong An^*
, Xiaosen Li
, Wuhui Li
, Fengzhang Ren
, Panpan Xu

^*Corresponding author for this work

Henan University of Science and Technology
Henan Key Laboratory of Non-Ferrous Materials Science & Processing Technology

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

12 Scopus citations

Abstract

We discover that the coercivity of SmCo/FeCo magnets can be enhanced by doping eutectic Sm-Zn alloy. The magnets without Sm-Zn alloy, having an average grain size of ~8 nm, are composed of well-dispersed Sm₂Co₁₇ phase and FeCo phase, and the coercivity is only 1.5 kOe. In contrast, the magnets with 5 wt% Sm-Zn alloy, having an average grain size of ~12 nm, are composed of SmCo₅ dominant phase plus Sm₂Co₁₇ minor phase and FeCo phase, and the coercivity is 6.9 kOe. The coercivity enhancement is primarily due to the phase transformation from Sm₂Co₁₇ to SmCo₅ phase. This work demonstrates a strategy to stabilize the high anisotropy SmCo₅ phase and enhance the coercivity in SmCo/FeCo nanocomposite magnets.

Original language	English
Article number	128965
Journal	Materials Letters
Volume	284
DOIs	https://doi.org/10.1016/j.matlet.2020.128965
State	Published - 1 Feb 2021
Externally published	Yes

Keywords

Coercivity
Magnetic materials
Nanocomposites
SmCo/FeCo magnets

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10.1016/j.matlet.2020.128965

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@article{22e042a848a44b5a83c5b276a046eaad,

title = "Coercivity enhancement of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Zn alloy",

abstract = "We discover that the coercivity of SmCo/FeCo magnets can be enhanced by doping eutectic Sm-Zn alloy. The magnets without Sm-Zn alloy, having an average grain size of \textasciitilde{}8 nm, are composed of well-dispersed Sm2Co17 phase and FeCo phase, and the coercivity is only 1.5 kOe. In contrast, the magnets with 5 wt\% Sm-Zn alloy, having an average grain size of \textasciitilde{}12 nm, are composed of SmCo5 dominant phase plus Sm2Co17 minor phase and FeCo phase, and the coercivity is 6.9 kOe. The coercivity enhancement is primarily due to the phase transformation from Sm2Co17 to SmCo5 phase. This work demonstrates a strategy to stabilize the high anisotropy SmCo5 phase and enhance the coercivity in SmCo/FeCo nanocomposite magnets.",

keywords = "Coercivity, Magnetic materials, Nanocomposites, SmCo/FeCo magnets",

author = "Shizhong An and Xiaosen Li and Wuhui Li and Fengzhang Ren and Panpan Xu",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

month = feb,

day = "1",

doi = "10.1016/j.matlet.2020.128965",

language = "英语",

volume = "284",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Coercivity enhancement of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Zn alloy

AU - An, Shizhong

AU - Li, Xiaosen

AU - Li, Wuhui

AU - Ren, Fengzhang

AU - Xu, Panpan

PY - 2021/2/1

Y1 - 2021/2/1

N2 - We discover that the coercivity of SmCo/FeCo magnets can be enhanced by doping eutectic Sm-Zn alloy. The magnets without Sm-Zn alloy, having an average grain size of ~8 nm, are composed of well-dispersed Sm2Co17 phase and FeCo phase, and the coercivity is only 1.5 kOe. In contrast, the magnets with 5 wt% Sm-Zn alloy, having an average grain size of ~12 nm, are composed of SmCo5 dominant phase plus Sm2Co17 minor phase and FeCo phase, and the coercivity is 6.9 kOe. The coercivity enhancement is primarily due to the phase transformation from Sm2Co17 to SmCo5 phase. This work demonstrates a strategy to stabilize the high anisotropy SmCo5 phase and enhance the coercivity in SmCo/FeCo nanocomposite magnets.

AB - We discover that the coercivity of SmCo/FeCo magnets can be enhanced by doping eutectic Sm-Zn alloy. The magnets without Sm-Zn alloy, having an average grain size of ~8 nm, are composed of well-dispersed Sm2Co17 phase and FeCo phase, and the coercivity is only 1.5 kOe. In contrast, the magnets with 5 wt% Sm-Zn alloy, having an average grain size of ~12 nm, are composed of SmCo5 dominant phase plus Sm2Co17 minor phase and FeCo phase, and the coercivity is 6.9 kOe. The coercivity enhancement is primarily due to the phase transformation from Sm2Co17 to SmCo5 phase. This work demonstrates a strategy to stabilize the high anisotropy SmCo5 phase and enhance the coercivity in SmCo/FeCo nanocomposite magnets.

KW - Coercivity

KW - Magnetic materials

KW - Nanocomposites

KW - SmCo/FeCo magnets

UR - https://www.scopus.com/pages/publications/85096181061

U2 - 10.1016/j.matlet.2020.128965

DO - 10.1016/j.matlet.2020.128965

M3 - 文章

AN - SCOPUS:85096181061

SN - 0167-577X

VL - 284

JO - Materials Letters

JF - Materials Letters

M1 - 128965

ER -

Coercivity enhancement of SmCo/FeCo nanocomposite magnets by doping eutectic Sm-Zn alloy

Abstract

Keywords

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