期刊
APL MATERIALS
卷 4, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4964621
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资金
- National Natural Science Foundation of China [51574027]
- National Key Research and Development Program of China [2016YFB0700505]
- Direct Enrollment Education Programs, Center for International Exchange, Tohoku University, Japan
- Grants-in-Aid for Scientific Research [15H05766] Funding Source: KAKEN
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. (C) 2016 Author(s).
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