Magnetocaloric effect in Fe-based amorphous alloys and their composites with low boron content
Magnetocaloric effect in Fe-based amorphous alloys and their composites with low boron content
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DOI：
10.1016/j.jnoncrysol.2018.02.022
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发表时间：
2018-05
影响因子：
3.5
通讯作者：
Xingzhou Li;Ye Pan;T. Lu
中科院分区：
文献类型：
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作者：
Xingzhou Li;Ye Pan;T. Lu
制备了非晶Fe_（88）Zr_（11）B_1软磁薄带，并通过测量其磁化强度研究了其磁热效应。为了增强其磁热效应，选择Co作为该前体的微合金化添加剂。在这些薄带中，Co替代Fe比Co替代Zr更能提高居里温度和磁熵变。在磁场为15 kOe时，Fe 86 Zr 11 B1 Co2的磁熵变峰值最大，为1.73 Jkg− 1 K − 1，Fe 88 Zr 9 B1 Co2的制冷量最大，为149.7 Jkg− 1。此外，一个显着的磁熵变可以得到使用多相材料在这项工作中。在磁场变化为15kOe时，Fe_（88）Zr_（11）B_1（50wt%）和Fe_（86）Zr_（11）B_1Co_2（50wt%）的层状复合材料的制冷容量最大提高了38.6%。此外，观察到非晶复合物在室温附近的相当宽的SM（T）曲线，这是Ericsson磁制冷循环的一个关键特征。
The amorphous soft magnetic Fe88Zr11B1ribbon was fabricated and the magnetocaloric effect of it was investigated through the measurement of magnetization in this work. To enhance its magnetocaloric effect, Co is selected as a microalloying addition to this precursor. Among these ribbons, the replacement of Fe by minor Co, compared with the replacement of Zr by Co, gives more increment in Curie temperature and magnetic entropy change. Fe86Zr11B1Co2exhibits the largest peak value of magnetic entropy change of 1.73 Jkg−1K−1and Fe88Zr9B1Co2shows the largest refrigerant capacity of 149.7 Jkg−1for an applied field of 15 kOe. Furthermore, a significant magnetic entropy change can be obtained using multiphase materials in this work. Under a magnetic field change of 15 kOe, the maximum improvement of the refrigerant capacity by 38.6%, in comparison with those of the individual alloys, is obtained for the layered composite of Fe88Zr11B1(50 wt%) and Fe86Zr11B1Co2(50 wt%). Besides, a quite broad SM(T) curve around room temperature of the amorphous composite is observed, which is a key feature for an Ericsson magnetic refrigeration cycle.