La0.8Ce0.2(Fe0.95Co0.05)11.8Si1.2/Sn42Bi58 magnetocaloric composites prepared by low temperature hot pressing

被引：39
作者：
Dong, X. T. [1 ]
Zhong, X. C. [1 ]
Peng, D. R. [1 ]
Huang, J. H. [2 ]
Zhang, H. [3 ]
Jiao, D. L. [1 ]
Liu, Z. W. [1 ]
Ramanujan, R. V. [4 ]
机构：
[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Baotou Res Inst Rare Earth, Baotou 014030, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[4] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 737卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Magnetic refrigeration composites; Low temperature hot pressing; Composite materials; La-Ce-Fe-Co-Si/Sn-Bi bulk composites; MAGNETIC ENTROPY CHANGE; ROOM-TEMPERATURE; REFRIGERATION; TRANSITION; ALLOY; LA(FE; SI;
D O I：
10.1016/j.jallcom.2017.12.108
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
La0.8Ce0.(2)(Fe0.95Co0.05)(11.8)Si-1.2/Sn42Bi58 magnetic refrigeration bulk composites were prepared by low temperature hot pressing (HP) technique at 138 degrees C. Sn-Bi eutectic alloy (Sn42Bi58) was used as binder. During the process of HP, the molten Sn42Bi58 alloy filled the gaps between the particles. Hence, the composites retained good magnetocaloric properties. The density of the composites gradually increased at larger HP pressure. The thermal conductivity and mechanical property of the composites also improved remarkably. By controlling the processing conditions, a series of La0.8Ce0.2(Fe0.95Co0.05)(11.8)Si-1.2/Sn42Bi58 bulk composites with high entropy change values of 5.57-6.70 J/(kg.K) at 2 T, high thermal conductivity of 10.72-19.64 W/(m.K) and compressive strength of 189-303 MPa were obtained. The present results indicate that low temperature HP technique can be used in mass production of high performance magnetocaloric materials. (c) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：568 / 574
页数：7
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