A large barocaloric effect associated with paramagnetic martensitic transformation in Co50Fe2.5V31.5Ga16 quaternary Heusler alloy
A large barocaloric effect associated with paramagnetic martensitic transformation in Co50Fe2.5V31.5Ga16 quaternary Heusler alloy
复制标题
Co50Fe2.5V31.5Ga16 四元 Heusler 合金中与顺磁马氏体相变相关的大压热效应
DOI：
10.1016/j.scriptamat.2019.10.003
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发表时间：
2020-03-01
影响因子：
6
通讯作者：
Liu, Yongsheng
中科院分区：
文献类型：
--
作者：
Liu, Hongwei;Li, Zhe;Liu, Yongsheng
Co_（50）Fe_（2.5）V_（31.5）Ga_（16）四元Heusler合金在室温附近发生了顺磁马氏体相变。在相变过程中，该合金表现出良好的双向形状记忆效应，导致两相之间的相对体积变化较大。因此，还发现MT对所施加的静水压力非常敏感。利用间接估算方法，得到静水压力引起的MT的最大可逆等温熵（AST）和绝热温变（Δ T-ad）分别达到31 J/kg K和6 K（5 kbar），表现出很大的压热效应。(C)2019 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
A martensitic transformation (MT) with paramagnetic behavior has been developed in Co50Fe2.5V31.5Ga16 quaternary Heusler alloy near room temperature. Accompanying the transformation, this alloy shows a good two-way shape memory effect, which results in a considerable relative volume change between two phases. Because of this, it has been also found that the MT is strongly sensitive to the applied hydrostatic pressure. By utilizing an indirectly estimated method, the obtained maximum reversible isothermal entropy (AST) and adiabatic temperature change (Delta T-ad) resulted from hydrostatic pressure induced MT, respectively, achieve similar to 31 J/kg K and 6 K under 5 kbar, performing a large barocaloric effect. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.