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The Giant Elastocaloric Effect in a Cu–Zn–Al Shape‐Memory Alloy: a Calorimetric Study
Author(s) -
GràciaCondal Adrià,
SternTaulats Enric,
Planes Antoni,
Vives Eduard,
Mañosa Lluís
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700422
Subject(s) - materials science , shape memory alloy , alloy , thermal , calorimetry , hysteresis , compression (physics) , composite material , characterization (materials science) , thermodynamics , condensed matter physics , nanotechnology , physics
We study the giant elastocaloric effect in a Cu–Zn–Al shape‐memory alloy by means of simultaneous calorimetry and dilatometry measurements under applied uniaxial compression which have been carried out with a bespoke experimental setup. The output data allow a unique quasidirect and indirect characterization of the thermal response that provides accurate Δ S and Δ T values. We report a large thermal response of |Δ S | = 22 J K kg −1 , |Δ T | = 12.3 K, and RC = 325 K kg −1 driven by moderate uniaxial compression changes of 32.2 MPa, which is comparable with the performance of the best magnetocaloric materials. In view of the hysteresis effects, the thermal response is predicted to exhibit reversible values for |Δ σ | = 32 MPa.