Synthesis and properties of La-Fe-Si/La-Co magnetocaloric composites

Yu Cai Wu; Xi Chun Zhong; Yuan Xin Li; Xuan Huang; Jiao Hong Huang; Cui Lan Liu; Zhong Wu Liu; Wan Qi Qiu; Ming Long Zhong; Zhen Chen Zhong; R. V. Ramanujan

doi:10.1016/j.materresbull.2023.112338

Synthesis and properties of La-Fe-Si/La-Co magnetocaloric composites

Yu Cai Wu, Xi Chun Zhong^*, Yuan Xin Li, Xuan Huang, Jiao Hong Huang, Cui Lan Liu, Zhong Wu Liu, Wan Qi Qiu, Ming Long Zhong, Zhen Chen Zhong, R. V. Ramanujan

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

LaFe_11.8Si_1.2/16wt%La₆₅Co₃₅ samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La₆₅Co₃₅ binder increased the desired 1:13 phase content in these samples during annealing at 1323 K. Interestingly, the α-Fe phase formed between the LaFe_11.8Si_1.2 particles and the La₆₅Co₃₅ binder and then disappeared as the annealing time extended. The sample annealed for 0.5 h had a distinct core-shell structure with Co in the shell, a desirable table-like (−∆S_M)−T curve was obtained and its RC (153 J·kg⁻¹) was 107% higher compared to the sample before annealing. The diffusion of Co from La₃Co to the 1:13 phase was hampered by the growth of La₅Si₃ phase. Relatively large (−∆S_M)^max of 8.51 J·kg⁻¹·K⁻¹ (Δμ₀H=2 T) and (σ_bc)^max of 374 MPa for the sample annealed for 24 h were obtained. These results indicated that the method combining SPS and diffusion annealing is promising to prepare La-Fe-Si based magnetocaloric composites with good properties.

Original language	English
Article number	112338
Journal	Materials Research Bulletin
Volume	166
DOIs	https://doi.org/10.1016/j.materresbull.2023.112338
Publication status	Published - Oct 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

A. Magnetic materials
B. Magnetic properties
B. Mechanical properties
B. Microstructure

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10.1016/j.materresbull.2023.112338

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title = "Synthesis and properties of La-Fe-Si/La-Co magnetocaloric composites",

abstract = "LaFe11.8Si1.2/16wt\%La65Co35 samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La65Co35 binder increased the desired 1:13 phase content in these samples during annealing at 1323 K. Interestingly, the α-Fe phase formed between the LaFe11.8Si1.2 particles and the La65Co35 binder and then disappeared as the annealing time extended. The sample annealed for 0.5 h had a distinct core-shell structure with Co in the shell, a desirable table-like (−∆SM)−T curve was obtained and its RC (153 J·kg−1) was 107\% higher compared to the sample before annealing. The diffusion of Co from La3Co to the 1:13 phase was hampered by the growth of La5Si3 phase. Relatively large (−∆SM)max of 8.51 J·kg−1·K−1 (Δμ0H=2 T) and (σbc)max of 374 MPa for the sample annealed for 24 h were obtained. These results indicated that the method combining SPS and diffusion annealing is promising to prepare La-Fe-Si based magnetocaloric composites with good properties.",

keywords = "A. Magnetic materials, B. Magnetic properties, B. Mechanical properties, B. Microstructure",

author = "Wu, \{Yu Cai\} and Zhong, \{Xi Chun\} and Li, \{Yuan Xin\} and Xuan Huang and Huang, \{Jiao Hong\} and Liu, \{Cui Lan\} and Liu, \{Zhong Wu\} and Qiu, \{Wan Qi\} and Zhong, \{Ming Long\} and Zhong, \{Zhen Chen\} and Ramanujan, \{R. V.\}",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = oct,

doi = "10.1016/j.materresbull.2023.112338",

language = "English",

volume = "166",

journal = "Materials Research Bulletin",

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TY - JOUR

T1 - Synthesis and properties of La-Fe-Si/La-Co magnetocaloric composites

AU - Wu, Yu Cai

AU - Zhong, Xi Chun

AU - Li, Yuan Xin

AU - Huang, Xuan

AU - Huang, Jiao Hong

AU - Liu, Cui Lan

AU - Liu, Zhong Wu

AU - Qiu, Wan Qi

AU - Zhong, Ming Long

AU - Zhong, Zhen Chen

AU - Ramanujan, R. V.

PY - 2023/10

Y1 - 2023/10

N2 - LaFe11.8Si1.2/16wt%La65Co35 samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La65Co35 binder increased the desired 1:13 phase content in these samples during annealing at 1323 K. Interestingly, the α-Fe phase formed between the LaFe11.8Si1.2 particles and the La65Co35 binder and then disappeared as the annealing time extended. The sample annealed for 0.5 h had a distinct core-shell structure with Co in the shell, a desirable table-like (−∆SM)−T curve was obtained and its RC (153 J·kg−1) was 107% higher compared to the sample before annealing. The diffusion of Co from La3Co to the 1:13 phase was hampered by the growth of La5Si3 phase. Relatively large (−∆SM)max of 8.51 J·kg−1·K−1 (Δμ0H=2 T) and (σbc)max of 374 MPa for the sample annealed for 24 h were obtained. These results indicated that the method combining SPS and diffusion annealing is promising to prepare La-Fe-Si based magnetocaloric composites with good properties.

AB - LaFe11.8Si1.2/16wt%La65Co35 samples were prepared by spark plasma sintering (SPS) and subsequent annealing. The La65Co35 binder increased the desired 1:13 phase content in these samples during annealing at 1323 K. Interestingly, the α-Fe phase formed between the LaFe11.8Si1.2 particles and the La65Co35 binder and then disappeared as the annealing time extended. The sample annealed for 0.5 h had a distinct core-shell structure with Co in the shell, a desirable table-like (−∆SM)−T curve was obtained and its RC (153 J·kg−1) was 107% higher compared to the sample before annealing. The diffusion of Co from La3Co to the 1:13 phase was hampered by the growth of La5Si3 phase. Relatively large (−∆SM)max of 8.51 J·kg−1·K−1 (Δμ0H=2 T) and (σbc)max of 374 MPa for the sample annealed for 24 h were obtained. These results indicated that the method combining SPS and diffusion annealing is promising to prepare La-Fe-Si based magnetocaloric composites with good properties.

KW - A. Magnetic materials

KW - B. Magnetic properties

KW - B. Mechanical properties

KW - B. Microstructure

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JF - Materials Research Bulletin

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Synthesis and properties of La-Fe-Si/La-Co magnetocaloric composites

Abstract

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Keywords

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