Phase constitution, microstructure evolution and magnetocaloric properties of LaFe11.8Si1.2 strip-casting flakes

Y. X. Li; Y. C. Wu; X. C. Zhong; S. M. Wu; C. L. Liu; J. H. Huang; J. Liu; H. Zhang; H. Y. Yu; Z. W. Liu; R. V. Ramanujan

doi:10.1016/j.intermet.2021.107373

Phase constitution, microstructure evolution and magnetocaloric properties of LaFe_11.8Si_1.2 strip-casting flakes

Y. X. Li, Y. C. Wu, X. C. Zhong^*, S. M. Wu, C. L. Liu, J. H. Huang, J. Liu, H. Zhang, H. Y. Yu, Z. W. Liu, R. V. Ramanujan

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

The phase composition, microstructural evolution and magnetocaloric properties of LaFe_11.8S_1.2 strip-casting flakes annealed at different temperatures and annealing times were investigated. The phase constitution and microstructure of strip-casting flakes are sensitive to annealing temperature, 1373K was found to be the optimum temperature for 1:13 phase formation. The microstructure and magnetocaloric properties changed with annealing time due to the diffusion of Fe and Si atoms. Samples annealed at 1373K for 10h reveal a high content (89.40 wt%) of the 1:13 phase and exhibited a maximum entropy change (−ΔS_M)^max of 16.89J/(kg·K) at 187K. These annealed LaFe_11.8S_1.2 strip-casting flakes are ideal master alloys for powder metallurgy fabrication of the heat exchangers used inactive magnetic regenerator prototypes.

Original language	English
Article number	107373
Journal	Intermetallics
Volume	139
DOIs	https://doi.org/10.1016/j.intermet.2021.107373
Publication status	Published - Dec 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

ASJC Scopus Subject Areas

General Chemistry
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Keywords

Annealing
LaFeSi alloy flakes
Magnetocaloric effect
Microstructure evolution
Phase constitution

Access to Document

10.1016/j.intermet.2021.107373

Cite this

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title = "Phase constitution, microstructure evolution and magnetocaloric properties of LaFe11.8Si1.2 strip-casting flakes",

abstract = "The phase composition, microstructural evolution and magnetocaloric properties of LaFe11.8S1.2 strip-casting flakes annealed at different temperatures and annealing times were investigated. The phase constitution and microstructure of strip-casting flakes are sensitive to annealing temperature, 1373K was found to be the optimum temperature for 1:13 phase formation. The microstructure and magnetocaloric properties changed with annealing time due to the diffusion of Fe and Si atoms. Samples annealed at 1373K for 10h reveal a high content (89.40 wt%) of the 1:13 phase and exhibited a maximum entropy change (−ΔSM)max of 16.89J/(kg·K) at 187K. These annealed LaFe11.8S1.2 strip-casting flakes are ideal master alloys for powder metallurgy fabrication of the heat exchangers used inactive magnetic regenerator prototypes.",

keywords = "Annealing, LaFeSi alloy flakes, Magnetocaloric effect, Microstructure evolution, Phase constitution",

author = "Li, {Y. X.} and Wu, {Y. C.} and Zhong, {X. C.} and Wu, {S. M.} and Liu, {C. L.} and Huang, {J. H.} and J. Liu and H. Zhang and Yu, {H. Y.} and Liu, {Z. W.} and Ramanujan, {R. V.}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = dec,

doi = "10.1016/j.intermet.2021.107373",

language = "English",

volume = "139",

journal = "Intermetallics",

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AU - Li, Y. X.

AU - Wu, Y. C.

AU - Zhong, X. C.

AU - Wu, S. M.

AU - Liu, C. L.

AU - Huang, J. H.

AU - Liu, J.

AU - Zhang, H.

AU - Yu, H. Y.

AU - Liu, Z. W.

AU - Ramanujan, R. V.

PY - 2021/12

Y1 - 2021/12

N2 - The phase composition, microstructural evolution and magnetocaloric properties of LaFe11.8S1.2 strip-casting flakes annealed at different temperatures and annealing times were investigated. The phase constitution and microstructure of strip-casting flakes are sensitive to annealing temperature, 1373K was found to be the optimum temperature for 1:13 phase formation. The microstructure and magnetocaloric properties changed with annealing time due to the diffusion of Fe and Si atoms. Samples annealed at 1373K for 10h reveal a high content (89.40 wt%) of the 1:13 phase and exhibited a maximum entropy change (−ΔSM)max of 16.89J/(kg·K) at 187K. These annealed LaFe11.8S1.2 strip-casting flakes are ideal master alloys for powder metallurgy fabrication of the heat exchangers used inactive magnetic regenerator prototypes.

AB - The phase composition, microstructural evolution and magnetocaloric properties of LaFe11.8S1.2 strip-casting flakes annealed at different temperatures and annealing times were investigated. The phase constitution and microstructure of strip-casting flakes are sensitive to annealing temperature, 1373K was found to be the optimum temperature for 1:13 phase formation. The microstructure and magnetocaloric properties changed with annealing time due to the diffusion of Fe and Si atoms. Samples annealed at 1373K for 10h reveal a high content (89.40 wt%) of the 1:13 phase and exhibited a maximum entropy change (−ΔSM)max of 16.89J/(kg·K) at 187K. These annealed LaFe11.8S1.2 strip-casting flakes are ideal master alloys for powder metallurgy fabrication of the heat exchangers used inactive magnetic regenerator prototypes.

KW - Annealing

KW - LaFeSi alloy flakes

KW - Magnetocaloric effect

KW - Microstructure evolution

KW - Phase constitution

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