The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys

Yu Cai Wu; Yuan Xin Li; Xi Chun Zhong; Cui Lan Liu; Jiao Hong Huang; Hong Ya Yu; Zhong Wu Liu; Ming Long Zhong; Zhen Chen Zhong; Raju V. Ramanujan

doi:10.1016/j.materresbull.2022.111974

The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys

Yu Cai Wu, Yuan Xin Li, Xi Chun Zhong^*, Cui Lan Liu, Jiao Hong Huang, Hong Ya Yu, Zhong Wu Liu, Ming Long Zhong, Zhen Chen Zhong, Raju V. Ramanujan

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

LaFe_11.8Si_1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstrated that the reduction of porosity in bulk magnetocaloric materials was an effective way to enhance the magnetocaloric effect. Compared to the HPS samples, the porosity of the SPS samples, with an initial powder size of 100−200 μm, reduced by 18%, which resulted in (−ΔS_M)^max and (−ΔS_M)_V^max increasing by 15% and 19%, respectively. The SPS samples had a large (−ΔS_M)^max value in the range of 7.3‒12.8 J/kg·K (μ₀ΔH=2T), good maximum compressive strength of 216‒636 MPa and thermal conductivity of 5.8‒7.6 W/m·K. Thus, SPS has been shown to be a promising processing technology to fabricate magnetocaloric materials (MCMs) with excellent performance.

Original language	English
Article number	111974
Journal	Materials Research Bulletin
Volume	155
DOIs	https://doi.org/10.1016/j.materresbull.2022.111974
Publication status	Published - Nov 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

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

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10.1016/j.materresbull.2022.111974

Cite this

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title = "The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys",

abstract = "LaFe11.8Si1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstrated that the reduction of porosity in bulk magnetocaloric materials was an effective way to enhance the magnetocaloric effect. Compared to the HPS samples, the porosity of the SPS samples, with an initial powder size of 100−200 μm, reduced by 18\%, which resulted in (−ΔSM)max and (−ΔSM)Vmax increasing by 15\% and 19\%, respectively. The SPS samples had a large (−ΔSM)max value in the range of 7.3‒12.8 J/kg·K (μ0ΔH=2T), good maximum compressive strength of 216‒636 MPa and thermal conductivity of 5.8‒7.6 W/m·K. Thus, SPS has been shown to be a promising processing technology to fabricate magnetocaloric materials (MCMs) with excellent performance.",

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

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

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = nov,

doi = "10.1016/j.materresbull.2022.111974",

language = "English",

volume = "155",

journal = "Materials Research Bulletin",

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T1 - The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys

AU - Wu, Yu Cai

AU - Li, Yuan Xin

AU - Zhong, Xi Chun

AU - Liu, Cui Lan

AU - Huang, Jiao Hong

AU - Yu, Hong Ya

AU - Liu, Zhong Wu

AU - Zhong, Ming Long

AU - Zhong, Zhen Chen

AU - Ramanujan, Raju V.

PY - 2022/11

Y1 - 2022/11

N2 - LaFe11.8Si1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstrated that the reduction of porosity in bulk magnetocaloric materials was an effective way to enhance the magnetocaloric effect. Compared to the HPS samples, the porosity of the SPS samples, with an initial powder size of 100−200 μm, reduced by 18%, which resulted in (−ΔSM)max and (−ΔSM)Vmax increasing by 15% and 19%, respectively. The SPS samples had a large (−ΔSM)max value in the range of 7.3‒12.8 J/kg·K (μ0ΔH=2T), good maximum compressive strength of 216‒636 MPa and thermal conductivity of 5.8‒7.6 W/m·K. Thus, SPS has been shown to be a promising processing technology to fabricate magnetocaloric materials (MCMs) with excellent performance.

AB - LaFe11.8Si1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstrated that the reduction of porosity in bulk magnetocaloric materials was an effective way to enhance the magnetocaloric effect. Compared to the HPS samples, the porosity of the SPS samples, with an initial powder size of 100−200 μm, reduced by 18%, which resulted in (−ΔSM)max and (−ΔSM)Vmax increasing by 15% and 19%, respectively. The SPS samples had a large (−ΔSM)max value in the range of 7.3‒12.8 J/kg·K (μ0ΔH=2T), good maximum compressive strength of 216‒636 MPa and thermal conductivity of 5.8‒7.6 W/m·K. Thus, SPS has been shown to be a promising processing technology to fabricate magnetocaloric materials (MCMs) with excellent performance.

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KW - B. Mechanical properties

KW - B. Microstructure

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The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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