Superior comprehensive properties of LaFe11.8Si1.2/Ce60Co40 magnetocaloric composites

Xichun Zhong; Yuanxin Li; Yucai Wu; Jiaohong Huang; Cuilan Liu; Jian Liu; Zhongwu Liu; Minglong Zhong; Zhenchen Zhong; R. V. Ramanujan

doi:10.1016/j.jre.2023.06.010

Superior comprehensive properties of LaFe_11.8Si_1.2/Ce₆₀Co₄₀ magnetocaloric composites

Xichun Zhong^*, Yuanxin Li, Yucai Wu, Jiaohong Huang, Cuilan Liu, Jian Liu, Zhongwu Liu, Minglong Zhong, Zhenchen Zhong, R. V. Ramanujan

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

LaFe_11.8Si_1.2/10 wt%Ce₆₀Co₄₀ composites were prepared by spark plasma sintering and subsequent diffusion annealing. A novel core–shell structure is observed with the LaFe_11.8Si_1.2 particles as the core and the (La,Ce)₂(Fe,Co,Si)₁₇ (2:17) phase as the shell. As diffusion annealing time (t_a) increases, this core–shell structure is replaced by the formation of the (La,Ce)₁(Fe,Co,Si)₁₃ phase. Annealing at 1323 K for 12 h results in samples with (−ΔS_M)^max of 9.30 J/(kg·K) (Δμ₀H = 2 T), good mechanical properties ((σ_bc)^max = 402 MPa, ε = 4.21%) and thermal conductivity of 8.7 W/(m·K). Thus, bulk composites with excellent comprehensive properties for magnetic refrigeration are obtained in this work.

Original language	English
Pages (from-to)	1073-1086
Number of pages	14
Journal	Journal of Rare Earths
Volume	42
Issue number	6
DOIs	https://doi.org/10.1016/j.jre.2023.06.010
Publication status	Published - Jun 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 Chinese Society of Rare Earths

ASJC Scopus Subject Areas

General Chemistry
Geochemistry and Petrology

Keywords

Diffusion annealing
LaFeSi/CeCo composites
Magnetocaloric effect
Microstructure evolution
Rare earths
Spark plasma sintering

Access to Document

10.1016/j.jre.2023.06.010

Cite this

@article{ef20f9468986452b8039768abed88f53,

title = "Superior comprehensive properties of LaFe11.8Si1.2/Ce60Co40 magnetocaloric composites",

abstract = "LaFe11.8Si1.2/10 wt%Ce60Co40 composites were prepared by spark plasma sintering and subsequent diffusion annealing. A novel core–shell structure is observed with the LaFe11.8Si1.2 particles as the core and the (La,Ce)2(Fe,Co,Si)17 (2:17) phase as the shell. As diffusion annealing time (ta) increases, this core–shell structure is replaced by the formation of the (La,Ce)1(Fe,Co,Si)13 phase. Annealing at 1323 K for 12 h results in samples with (−ΔSM)max of 9.30 J/(kg·K) (Δμ0H = 2 T), good mechanical properties ((σbc)max = 402 MPa, ε = 4.21%) and thermal conductivity of 8.7 W/(m·K). Thus, bulk composites with excellent comprehensive properties for magnetic refrigeration are obtained in this work.",

keywords = "Diffusion annealing, LaFeSi/CeCo composites, Magnetocaloric effect, Microstructure evolution, Rare earths, Spark plasma sintering",

author = "Xichun Zhong and Yuanxin Li and Yucai Wu and Jiaohong Huang and Cuilan Liu and Jian Liu and Zhongwu Liu and Minglong Zhong and Zhenchen Zhong and Ramanujan, {R. V.}",

note = "Publisher Copyright: {\textcopyright} 2023 Chinese Society of Rare Earths",

year = "2024",

month = jun,

doi = "10.1016/j.jre.2023.06.010",

language = "English",

volume = "42",

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journal = "Journal of Rare Earths",

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TY - JOUR

T1 - Superior comprehensive properties of LaFe11.8Si1.2/Ce60Co40 magnetocaloric composites

AU - Zhong, Xichun

AU - Li, Yuanxin

AU - Wu, Yucai

AU - Huang, Jiaohong

AU - Liu, Cuilan

AU - Liu, Jian

AU - Liu, Zhongwu

AU - Zhong, Minglong

AU - Zhong, Zhenchen

AU - Ramanujan, R. V.

PY - 2024/6

Y1 - 2024/6

N2 - LaFe11.8Si1.2/10 wt%Ce60Co40 composites were prepared by spark plasma sintering and subsequent diffusion annealing. A novel core–shell structure is observed with the LaFe11.8Si1.2 particles as the core and the (La,Ce)2(Fe,Co,Si)17 (2:17) phase as the shell. As diffusion annealing time (ta) increases, this core–shell structure is replaced by the formation of the (La,Ce)1(Fe,Co,Si)13 phase. Annealing at 1323 K for 12 h results in samples with (−ΔSM)max of 9.30 J/(kg·K) (Δμ0H = 2 T), good mechanical properties ((σbc)max = 402 MPa, ε = 4.21%) and thermal conductivity of 8.7 W/(m·K). Thus, bulk composites with excellent comprehensive properties for magnetic refrigeration are obtained in this work.

AB - LaFe11.8Si1.2/10 wt%Ce60Co40 composites were prepared by spark plasma sintering and subsequent diffusion annealing. A novel core–shell structure is observed with the LaFe11.8Si1.2 particles as the core and the (La,Ce)2(Fe,Co,Si)17 (2:17) phase as the shell. As diffusion annealing time (ta) increases, this core–shell structure is replaced by the formation of the (La,Ce)1(Fe,Co,Si)13 phase. Annealing at 1323 K for 12 h results in samples with (−ΔSM)max of 9.30 J/(kg·K) (Δμ0H = 2 T), good mechanical properties ((σbc)max = 402 MPa, ε = 4.21%) and thermal conductivity of 8.7 W/(m·K). Thus, bulk composites with excellent comprehensive properties for magnetic refrigeration are obtained in this work.

KW - Diffusion annealing

KW - LaFeSi/CeCo composites

KW - Magnetocaloric effect

KW - Microstructure evolution

KW - Rare earths

KW - Spark plasma sintering

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