Abstract
The elastocaloric effect (ECE) is studied in samples of rapidly quenched ribbons of a Ti2NiCu alloy at a periodic action by a mechanical stress to 300 MPa at a frequency to 50 Hz. ECE is maximal near the temperatures of a first-order thermoelastic martensitic phase transition. The ECE maximum is observed in a point corresponding to the completion of the reverse martensitic transition (T = 67.5°C) and is 21 and 6 K at cyclic mechanical loads of 300 and 100 MPa, respectively. The ECE value is shown to be independent of the frequency of the external loads in the range from 0 to 50 Hz. The specific power of a rapidly quenched ribbon as a thermal energy transformer is estimated at the external mechanical stress of 100 MPa; its value is 150 W/g at a frequency of 50 Hz and ECE is 6 K.
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Funding
This work was performed in the framework of state task to the Kotel’nikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences and supported in part by the Russian Foundation for Basic Research (project nos. 18-07-01320 and 18-37-0048).
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Translated by Yu. Ryzhkov
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Morozov, E.V., Fedotov, S.Y., Petrov, A.V. et al. Elastocaloric Effect in a Rapidly Quenched Ti2NiCu Alloy at a Periodic Action of a Stretching Force at Frequencies to 50 Hz. Phys. Solid State 62, 972–975 (2020). https://doi.org/10.1134/S1063783420060189
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DOI: https://doi.org/10.1134/S1063783420060189