J. Mater. Sci. Technol. ›› 2022, Vol. 117: 167-173.DOI: 10.1016/j.jmst.2021.11.051

• Research Article • Previous Articles     Next Articles

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

Zhenzhuang Lia,*(), Zongbin Lib, Yunzhuo Lua,*(), Xing Lua,*(), Liang Zuob   

  1. aSchool of Material Science and Engineering, Dalian Jiaotong University, Dalian 116028, China
    bKey Laboratory for Anisotropy and Texture of Materials, Ministry of Education, School of Material Science and Engineering, Northeastern University, Shenyang 110819, China

Abstract:

We demonstrate giant elastocaloric effect and outstanding refrigeration capacity in a <0 0 1>A textured Ni50Mn35In13Si2 alloy with large transformation entropy change ΔStr and low-hysteresis ΔThys. On unloading from a relatively low compressive stress of 300 MPa, giant adiabatic temperature variation ΔTad up to -17.7 K was realized. Moreover, large stress-induced entropy change ΔSσ of 25.9 J kg-1 K-1 and giant refrigeration capacity RCσ of 1330 J kg-1 were achieved under the compressive stress of 300 MPa. Simultaneously achieving giant ΔTad and outstanding refrigeration capacity indicates that this alloy is promising to be the candidate material for elastocaloric refrigeration.

Key words: Ni-Mn-In alloys, Directional solidification, Elastocaloric effect, Martensitic transformation