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范文兵,侯育花,黄有林,郭开祥,李志浩,钟震晨.熔体快淬LaFe11.85Si1.15合金磁热性能的研究[J].稀有金属材料与工程(英文),2019,48(1):323~328.[Fan Wenbing,Hou Yuhua,Huang Youlin,Guo Kaixiang,Li Zhihao and Zhong Zhenchen.Research on Magnetocaloric Properties of LaFe11.85Si1.15 Alloys Prepared by Melt-spinning Method[J].Rare Metal Materials and Engineering,2019,48(1):323~328.]
Research on Magnetocaloric Properties of LaFe11.85Si1.15 Alloys Prepared by Melt-spinning Method
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Received:May 26, 2017  Revised:August 15, 2017
DOI:
Key words: melt-spinning  magnetocaloric effect  magnetic entropy  refrigerating capacity
Foundation item:国家自然科学基金(批准号51401103和11304146以及51564037)和江西省自然科学基金(批准号20161BAB206110)和江西省教育厅科学技术项目(批准号GJJ160713)资助的课题
Author NameAffiliation
Fan Wenbing,Hou Yuhua,Huang Youlin,Guo Kaixiang,Li Zhihao and Zhong Zhenchen  
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Abstract:
      LaFe11.85Si1.15 ribbons with large magnetic entropy change and minor magnetic hysteresis were prepared by melt-spinning technique followed by heat treatment. The influences of different heat treatment processes on phase constitution, microstructure evolution, magnetic entropy change, Curie temperature and itinerant electron metamagnetic transitions were investigated in details. It was shown that the annealed processes had a great influence on the content of 1: 13 phase and magnetocaloric effect. For LaFe11.85Si1.15 alloy prepared under the annealed time of 10 h at 1050 ℃, the maximum △SM value of 20.54 J/(kg K) and the refrigerating capacity of 417.21 J/kg can be acquired due to the high content of 1:13 phase in the magnetic field of 0-5 T, and the phenomenon of itinerant electron metamagnetic transition can be observed, obviously. The shorter annealed time is not beneficial in the formation of 1:13 phase. Meanwhile, too long annealing time can also lead to the decomposition of 1: 13 phase and increased of a-Fe phase.