Large elastocaloric effect at small transformation strain in Ni₄₅Mn₄₄Sn₁₁ metamagnetic shape memory alloys

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• 作者：Wen Sun ; Jian Liu ; ^{liujian@nimte.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Binfeng Lu ; Yang Li ; Aru Yan
• 关键词：Shape memory alloy ; Martensitic phase transformation ; Elastocaloric effect
• 刊名：Scripta Materialia
• 出版年：2016
• 出版时间：15 March 2016
• 年：2016
• 卷：114
• 期：Complete
• 页码：1-4
• 全文大小：570 K

文摘

The elastocaloric effect has been investigated by directly measuring temperature change in Ni₄₅Mn₄₄Sn₁₁ metamagnetic shape memory alloys. The stress plateau for magnetostructural transition can be drastically reduced due to the mechanical training effect. A large temperature change of 4 K was found during compressing the sample with a small transformation strain of 1.3% at 291.5 K. Our results indicate that Ni–Mn–Sn alloys can be a promising candidate for solid-state refrigerants in mechanical cooling application by low deformation level.