Simultaneously realizing good volumetric entropy change and mechanical strength of La_(0.8)Ce_(0.2)Fe_(11.51)Mn_(0.19)Si_(1.3)H_(y) plates  

作　　者：Juan Cheng Caiyin You Bo Li Yaru Guo Zhaojie Li Lei Gao Pengyu Wang 

机构地区：[1]School of Materials Science and Technology,Xi'an University of Technology,Xi'an,710048,China [2]State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou,014030,China

出　　处：《Journal of Rare Earths》2023年第10期1568-1573,I0004,共7页稀土学报（英文版）

基　　金：the ISF-SFC Joint Research Program(51961145305(NSFC));the National Natural Science Foundation of China(5217119);the Key Research and Development Program of Shanxi Province(2021KWZ-12);the IMAR(Inner Mongolia Autonomous Region)Natural Science Foundation(2021MS05016);the Northern Rare Earth Project(BFXT-2021-D-0013)。

摘　　要：It is hard to get a high-strength La(Fe,Si)_(13)-based hydrides owing to the brittle feature of hydrides.In this work,we fabricated the La_(0.8)Ce_(0.2)Fe_(11.51)Mn_(0.19)Si_(1.3)plates through hot pressing at 1323 K for various time.Subsequently,the saturated hydrogenization is achieved at 593 K in H_2 atmosphere of 0.13 MPa for 210 min.The microstructure and magnetocaloric properties were investigated by an X-ray diffractometer,a scanning electron microscope and the Versa-Lab.Under magnetic fields of 0-2 T,the maximal volumetric entropy change is 91.4 mJ/(cm^(3)·K)at 297 K for the hydride plates.The hydride plate simultaneously has excellent mechanical properties with the maximum bending strength of 213 MPa,which suggest that the hot pressing followed by hydrogenation could be an effective route of fabricating La(Fe,Si)_(13)-based hydrides for the potential application in the magnetic refrigerator.

关 键 词：Magnetocaloric effect Mechanical strength Volumetric entropy change HOT-PRESSING Rare earths 

分 类 号：TB64[一般工业技术—制冷工程]