LaFe11Co0.8Si1.2/Al magnetocaloric composites prepared by hot pressing
LaFe11Co0.8Si1.2/Al magnetocaloric composites prepared by hot pressing
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DOI：
10.1016/j.jallcom.2020.153846
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发表时间：
2020-05
影响因子：
6.2
通讯作者：
Mingxiao Zhang;Y. Ouyang;Yifei Zhang;Jian Liu
中科院分区：
文献类型：
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作者：
Mingxiao Zhang;Y. Ouyang;Yifei Zhang;Jian Liu
研究了热压法制备的LaFe11Co0.8Si1.2/10 wt% Al复合材料的显微组织、力学性能、传热性能和磁热效应。在复合材料的压实过程中，Al颗粒可以变形并形成均匀的基体。在接近873 K的温度下，纯Al金属与lafe11co0.8 si1.2化合物反应缓慢。Al颗粒的引入显著提高了材料的力学性能和传热性能，而磁热效应则略有降低。在室温下，上述复合材料在2 T磁场变化下的最大熵变值为5.1 ~ 5.9 J/kg K，导热系数为9.9 ~ 17.0 W/m K，抗压强度为106 ~ 186 MPa。
The microstructure, mechanical properties, thermal transfer performance, and magnetocaloric effect were investigated in LaFe11Co0.8Si1.2/10 wt% Al composites prepared by hot pressing. The Al particles can deform and form a homogenous matrix during compacting in these composites. Pure Al metal reacts slowly with the LaFe11Co0.8Si1.2compound at temperatures near 873 K. The introduction of Al particles significantly enhances the mechanical and thermal transfer properties, while slightly degrades the magnetocaloric effect. At room temperature, aforementioned composites show maximum entropy change values of 5.1–5.9 J/kg K under a magnetic change of 2 T, high thermal conductivity of 9.9–17.0 W/m K, and high compressive strength of 106–186 MPa.