Studying the elastocaloric effect in a fast-quenched Ti2NiCu ribbon with the shape memory effect

Resumo

The elastocaloric effect (ECE) in fast-quenched Ti₂NiCu ribbon under the periodic action of tensile force is studied experimentally. The ECE is measured as a function of relative elongation and the frequency of cycles in the range of 0.2 to 4 Hz. The maximum measured ECE in the alloy is 9.4 K under a mechanical load of 300 MPa at a relative deformation of 1%, frequencies of 0.2 to 0.5 Hz, and a temperature of 67°C. The specific power of the ribbon is estimated; it reaches its maximum at a frequency of f = 4 Hz, corresponding to W = 10 W g⁻¹. The possible practical use of Ti₂NiCu alloy for elastocaloric cooling is discussed.