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Novel processing of Cu-bonded La-Ce-Fe-Co-Si magnetocaloric composites for magnetic refrigeration by low-temperature hot pressing

Published online by Cambridge University Press:  14 June 2018

D. R. Peng ,
X. C. Zhong ,
J. H. Huang ,
H. Zhang ,
Y. L. Huang ,
X. T. Dong ,
D. L. Jiao ,
Z. W. Liu  and
R. V. Ramanujan Open the ORCID record for R. V. Ramanujan [Opens in a new window]
D. R. Peng
Affiliation:
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
X. C. Zhong*
Affiliation:
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
J. H. Huang
Affiliation:
Baotou Research Institute of Rare Earths, Baotou 014030, China
H. Zhang
Affiliation:
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Y. L. Huang
Affiliation:
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
X. T. Dong
Affiliation:
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
D. L. Jiao
Affiliation:
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
Z. W. Liu
Affiliation:
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
R. V. Ramanujan
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore Singapore-HUJ Alliance for Research and Enterprise (SHARE), Nanomaterials for Energy and Energy-Water Nexus (NEW), Campus for Research Excellence and Technological Enterprise (CREATE), Singapore 138602, Singapore
*
Address all correspondence to X. C. Zhong at xczhong@scut.edu.cn
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Abstract

We report on a novel processing route to prepare La0.8Ce0.2(Fe0.95Co0.05)11.8Si1.2/Cu bulk composites by low-temperature hot pressing. With increasing copper content, the compressive strength of the composites first decrease and then increase owing to the buffering effect of copper, but the magnetocaloric effect reduces to some extent. Copper addition improves the thermal conductivity of the composites, which compensates for the decrease in thermal conductivity due to porosity. A relatively large entropy change of 5.75–7.19 J/(kg K) at 2 T near the Curie temperature (249 K), good thermal conductivity of 7.51–15.55 W/(m·K), and improved compressive strength of 151.1–248.0 MPa make these composites attractive magnetic refrigeration materials.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 3 , September 2018 , pp. 1216 - 1223
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Copyright
Copyright © Materials Research Society 2018 

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