Superior comprehensive properties of LaFe_(11.8)Si_(1.2)/Ce_(60)Co_(40) magnetocaloric composites  

作　　者：Xichun Zhong Yuanxin Li Yucai Wu Jiaohong Huang Cuilan Liu Jian Liu Zhongwu Liu Minglong Zhong Zhenchen Zhong R.V.Ramanujan 

机构地区：[1]School of Materials Science and Engineering,South China University of Technology,Guangzhou,510640,China [2]Baotou Research Institute of Rare Earths,Baotou,014030,China [3]Center for Advanced Solidification Technology,School of Materials Science and Engineering,Shanghai University,Shanghai,200444,China [4]Jiangxi KeyLaboratory for Rare Earth Magnetic Materials and Devices&Institute for Rare Earth Magnetic Materials and Devices(IREMMD),Jiangxi University of Science and Technology,Ganzhou,341000,China [5]School of Materials Science and Engineering,Nanyang Technological University,639798,Singapore [6]Singapore-HUJ Alliance for Research and Enterprise(SHARE),The Smart Grippers for Soft Robotics(SGSR)Programme,Campus for Research Excellence and Technological Enterprise(CREATE),138602,Singapor

出　　处：《Journal of Rare Earths》2024年第6期1073-1086,I0003,共15页稀土学报（英文版）

基　　金：Project supported by the Guangdong Basic and Applied Basic Research Foundation(2022A1515012578,2019A1515010970);the Guangzhou Municipal Science and Technology Project(201904010030);the National Natural Science Foundation of China(51874143,52066001);the Special Project of Foshan Scientific and Technological Innovation Team(2030032000171,2120001010823);partially supported by the National Research Foundation,Prime Minister’s Office,Singapore under its Campus of ResearchExcellence and Technological Enterprise(CREATE)programme。

摘　　要：LaFe_(11.8)Si_(1.2)/10 wt%Ce_(60)Co_(40) composites were prepared by spark plasma sintering and subsequent diffusion annealing.A novel core-shell structure is observed with the LaFe11.8Si1.2 particles as the core and the(La,Ce)_(2)(Fe,Co,Si)_(17)(2:17)phase as the shell.As diffusion annealing time(t_(a))increases,this core-shell structure is replaced by the formation of the(La,Ce)_(1)(Fe,Co,Si)_(13) phase.Annealing at 1323 K for 12 h results in samples with(-ΔSM)^(max) of 9.30 J/(kg·K)(Δμ0H=2 T),good mechanical properties((σbc)^(max)=402 MPa,ε=4.21%)and thermal conductivity of 8.7 W/(m·K).Thus,bulk composites with excellent comprehensive properties for magnetic refrigeration are obtained in this work.

关 键 词：LaFe_(11.8)Si_(1.2)/Ce_(60)Co_(40)composites Spark plasma sintering Diffusion annealing Microstructure evolution Magnetocaloric effect RAREEARTHS 

分 类 号：TB332[一般工业技术—材料科学与工程]