Elastocaloric Effect and Magnetic Properties of Cu–Al–Mn Shape Memory Alloy

Authors

Shulei Zhao, Taiyuan University of Science and Technology
Chen Li, Taiyuan University of Science and Technology
Guoliang Ma, Taiyuan University of Science and Technology
Mengru Chen, Taiyuan University of Science and Technology
Fengnan Yang, Taiyuan University of Science and Technology
Shuotong Zong, Taiyuan University of Science and Technology
Yan Zhang, Taiyuan University of Science and Technology
Fenghua Chen, Taiyuan University of Science and Technology
Zhengyi Jiang, University of Wollongong

Publication Name

Physica Status Solidi (A) Applications and Materials Science

Abstract

Herein, the magnetic properties and elastocaloric effects of Cu70Al19 + 0.5xMn11−0.5x (x = 0, 1, 2, 3) alloys are investigated. The resistance versus temperature curves indicate that the phase transition temperature increases as the Mn content decreases. In particular, the Cu70Al20.5Mn9.5 alloy exhibits a phase transition temperature close to room temperature. Therefore, the elastocaloric effects of this alloy are examined under stresses ranging from 200 to 500 MPa. The results show that the adiabatic temperature change of the alloy under a stress of 500 MPa reaches 9.8 K. Furthermore, the magnetization curves at 300 K reveal that the magnetic properties of the alloy significantly improve after undergoing low-temperature aging treatment. The X-ray diffraction patterns show that this improvement can be attributed to the transformation of the β1 phase to the ferromagnetic phase β3. Overall, the Cu70Al20.5Mn9.5 alloy demonstrates elastocaloric and magnetic properties comparable to those observed in certain Ni–Mn-based alloys.

Open Access Status

This publication is not available as open access

Volume

221

Issue

4

Article Number

2300672

Funding Number

201805D211042

Funding Sponsor

Natural Science Foundation of Shanxi Province