Giant elastocaloric effect covering wide temperature range in columnar-grained Cu71.5Al17.5Mn11 shape memory alloy
Giant elastocaloric effect covering wide temperature range in columnar-grained Cu71.5Al17.5Mn11 shape memory alloy
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柱状晶Cu71.5Al17.5Mn11形状记忆合金在宽温度范围内的巨弹热效应
DOI：
10.1063/1.4964621
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发表时间：
2016-10
期刊：
影响因子：
6.1
通讯作者：
Kainuma Ryosuke
中科院分区：
文献类型：
--
作者：
Xu Sheng;Huang Hai-You;Xie Jianxin;Takekawa Shouhei;Xu Xiao;Omori Toshihiro;Kainuma Ryosuke
研究了定向凝固柱状晶Cu71.5Al17.5Mn11形状记忆合金的弹热效应。由可逆马氏体相变产生的25.0 J/kg K的大熵变被证明。直接测量了12-13 K的绝热温变，覆盖了100 K以上的宽温区。确定了具有100.8 K/GPa的比弹性热能力的低施加应力，并讨论了可能达到的宽至215 K以上的操作温度窗口。柱状晶Cu-Al-Mn形状记忆合金由于其优异的弹热制冷性能、较低的外加应力和均匀的相变，使其成为一种很有前途的固态制冷材料。
The elastocaloric effect in a columnar-grained Cu71.5Al17.5Mn11 shape memory alloy fabricated by directional solidification was investigated. A large entropy change of 25.0 J/kg K generated by the reversible martensitic transformation was demonstrated. The adiabatic temperature change of 12-13 K was directly measured, covering a wide temperature range of more than 100 K. The low applied stress with a specific elastocaloric ability of 100.8 K/GPa was identified and the potentially attainable operational temperature window as wide as more than 215 K was also discussed. The outstanding elastocaloric refrigeration capability, together with the low applying stress and uniform phase transformation, makes the columnar-grained Cu–Al–Mn shape memory alloy a promising material for solid-state refrigeration.
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