Large elastocaloric effect in a Heusler-type Co50V35Ga14Ni1 polycrystalline alloy
Cong Liu, Dong Li, Zongbin Li, Zongbin Li, Bo Yang, Haile Yan, Jianrong Li, Zhe Li, Zhe Li, Xiang Zhao, Liang Zuo
Abstract
Solid state refrigeration technology relies on the high-performance materials with remarkable caloric properties. Here, we demonstrate a large elastocaloric effect through stress-induced martensitic transformation in a Heusler-type Co50V35Ga14Ni1 polycrystalline alloy. By rapidly removing a moderate compressive stress of 400 MPa, a large adiabatic temperature change up to −12.1 K is achieved. Moreover, high cyclability of the elastocaloric effect with more than 4000 loading/unloading cycles is also obtained. With the combination of a large elastocaloric effect and good cyclability, Co-V-Ga based alloys hold great potential for environment-friendly solid-state refrigeration applications.