Mass production of magnetocaloric LaFeMnSiB alloys with hydrogenation

作     者：Tao Zhang Cheng-yong Wang Lugee Li Yong Zhang Cui-lan Liu 

作者机构：Guangdong University of TechnologyGuangzhou 510006GuangdongChina Dongguan Eontech Co.Ltd.Dongguan 523662GuangdongChina State Key Laboratory of Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Baotou Research Institute of Rare EarthBaotou 014030Inner MongoliaChina 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2017年第24卷第4期

页      面：462-468页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by Inner Mongolia Natural Science Foundation of China(2013MS0802) 

主　　题：Magnetocaloric effect Annealing Hydrogenation Adiabatic temperature change Relative cooling power Maximum magnetic entropy change 

摘      要：LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）Hxalloys were prepared by *** were annealed at 1343Kfor30-90 hto form the NaZn13 ***-rich andα-Fe secondary phases were also *** hydrogenation at 553 Kand 0.15 MPa of H_2 pressure for 5hwas employed to improve the Curie temperature of the alloys to 279 *** maximum magnetic entropy change,relative cooling power,and adiabatic temperature change of LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）H_x annealed at 1343 Kfor 90hafter hydrogen absorption are 6.38J/（kg·K）（magnetic changesμ0ΔH =1.65T）,100.1J/kg（μ0ΔH =1.65T）,and 2.2 K（μ0ΔH =1.48T）,*** the maximum magnetic entropy change of the LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）H_x alloys is lower than those of similar alloys with high purity raw materials,the relative cooling power is nearly the *** effect of impurities of the raw materials used was also *** is assumed that the impurity of 0.2wt.% Al is responsible for the reduced entropy change of the resulted *** LaFe_（11.39）Mn_（0.35）Si_（1.26）B_（0.1）H_x alloys prepared by this method could be a low cost alternative material for room temperature magnetic cooling applications.