Enhanced elastocaloric effect and refrigeration properties in a Si-doped Ni-Mn-In shape memory alloy

We demonstrate giant elastocaloric effect and outstanding refrigeration capacity in a 0 0 1 A textured Ni 50 Mn 35 In 13 Si 2 alloy with large transformation entropy change AS tr and low-hysteresis AT hys . On unloading from a relatively low compressive stress of 300 MPa, giant adiabatic temperature variation AT ad up to -17.7 K was realized. Moreover, large stress-induced entropy change AS , of 25.9 J kg -1 K -1 and giant refrigeration capacity RC , of 1330 J kg -1 were achieved under the compressive stress of 300 MPa. Simultaneously achieving giant AT ad and outstanding refrigeration capacity indicates that this alloy is promising to be the candidate material for elastocaloric refrigeration. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

We demonstrate a alloy material with a giant elastocaloric effect and outstanding refrigeration capacity, which exhibits a large adiabatic temperature variation and refrigeration capacity under low hysteresis and large transformation entropy change. This indicates that the alloy has the potential to be a candidate material for elastocaloric refrigeration.