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

被引：4

作者：

Wu, Yu-Cai ^{[1
]}

Li, Yuan-Xin ^{[1
]}

Zhong, Xi -Chun ^{[1
]}

Liu, Cui-Lan ^{[2
]}

Huang, Jiao-Hong ^{[2
]}

Yu, Hong-Ya ^{[1
]}

Liu, Zhong-Wu ^{[1
]}

Zhong, Ming -Long ^{[3
,4
]}

Zhong, Zhen-Chen ^{[3
,4
]}

V. Ramanujan, Raju ^{[5
]}

机构：

[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China

[2] Baotou Res Inst Rare Earths, Baotou 014030, Peoples R China

[3] Jiangxi Univ Sci & Technol, Jiangxi Key Lab Rare Earth Magnet Mat & Devices, Ganzhou 341000, Peoples R China

[4] Jiangxi Univ Sci & Technol, Inst Rare Earth Magnet Mat & Devices IREMMD, Ganzhou 341000, Peoples R China

[5] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

来源：

MATERIALS RESEARCH BULLETIN | 2022年 / 155卷

基金：

中国国家自然科学基金;

关键词：

Intermetallic compounds; Magnetic materials; Microstructure; Magnetic properties; Mechanical properties; MAGNETIC ENTROPY CHANGE; ROOM-TEMPERATURE; CO-SI; COMPOSITES; REFRIGERATION; TRANSITION; MECHANISM; LA(FE;

D O I：

10.1016/j.materresbull.2022.111974

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

LaFe(11.8)Si(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 mu m, reduced by 18%, which resulted in (-delta S-M)(max )and (-delta S-M)(V)(max) increasing by 15% and 19%, respectively. The SPS samples had a large (-delta S-M)(max) value in the range of 7.3-12.8 J/kg.K (mu(0)AH=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 pro-cessing technology to fabricate magnetocaloric materials (MCMs) with excellent performance.

引用

页数：10

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