材料科学
合金
微观结构
大气温度范围
形状记忆合金
制冷
绝热过程
复合材料
冶金
热力学
物理
作者
Guoyao Zhang,Honglin Wang,Zongbin Li,Bo Yang,Haile Yan,Liang Zuo
标识
DOI:10.1016/j.scriptamat.2023.115725
摘要
High-performance elastocaloric materials coupled with giant elastocaloric effect and broad working temperature range are highly demanded for solid-state refrigeration applications. Here, we demonstrate giant elastocaloric response covering a wide temperature region in a directionally solidified Ni50Mn30Ti20 alloy with the columnar-grained microstructure and <001>A preferred orientation. Owing to the effective reduction in the transformation temperatures (∼200 K) through composition tuning, large superelastic response with the recovery strain of 9% is obtained from 213 K to 333 K, giving rise to the maximum adiabatic temperature change as high as −31.3 K upon unloading. Moreover, giant |ΔTad| values higher than 20 K have been well achieved within a wide temperature window of 90 K ranging from 223 K to 313 K.
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