Combination of conventional elastocaloric and magnetocaloric effects in a Co37Ni35Al28 ferromagnetic shape memory alloy

Combination of conventional elastocaloric and magnetocaloric effects in a Co37Ni35Al28 ferromagnetic shape memory alloy
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Co37Ni35Al28 铁磁形状记忆合金中传统弹热和磁热效应的组合

DOI:
10.1016/j.scriptamat.2017.11.041
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发表时间:
2018-03
期刊:
影响因子:
6
通讯作者:
Ren Xiaobing
Ren Xiaobing
中科院分区:
材料科学1区
文献类型:
--
作者:
Khan Muhammad Tahir;Wang Yu;Wang Cong;Liao Xiaoqi;Yang Sen;Song Xiaoping;Ren Xiaobing

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研究了多晶铁磁形状记忆合金Co37Ni35Al28的弹热效应和磁热效应。该合金在350 MPa下表现出弹性热效应,熵变为− 5.05 J kg− 1 K − 1。在80 K的工作温度范围内,其弹热效应的温度变化大于1 K。此外,该合金还表现出传统的磁热效应。该合金的常规弹热效应和磁热效应具有相同的熵变和温度变化符号,通过施加应力和磁场可以实现多种热效应的同时利用,从而提高其整体制冷能力。
The elastocaloric and magnetocaloric effects in a polycrystalline ferromagnetic shape memory alloy Co37Ni35Al28are investigated. The alloy shows conventional elastocaloric effect with entropy change of − 5.05 J kg− 1K− 1under 350 MPa. The temperature change of its elastocaloric effect is over 1 K within a working temperature range of 80 K covering ambient temperature. Moreover, the alloy also shows conventional magnetocaloric effect. The conventional elastocaloric and magnetocaloric effects of the alloy possess the same sign of entropy change and temperature change, the simultaneous use of multiple caloric effects can be achieved by applying stress and magnetic field, which improves its overall refrigeration capability.
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