中国物理B ›› 2020, Vol. 29 ›› Issue (5): 56202-056202.doi: 10.1088/1674-1056/ab8213

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Effect of chemical ordering annealing on superelasticity of Ni-Mn-Ga-Fe ferromagnetic shape memory alloy microwires

Yanfen Liu(刘艳芬), Xuexi Zhang(张学习), Hongxian Shen(沈红先), Jianfei Sun(孙剑飞), Qinan Li(李奇楠), Xiaohua Liu(刘晓华), Jianjun Li(李建军), Weidong Cheng(程伟东)   

  1. 1 Department of Physics, Qiqihar University, Qiqihar 161006, China;
    2 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2020-02-06 出版日期:2020-05-05 发布日期:2020-05-05
  • 通讯作者: Yanfen Liu E-mail:lxylyf_0@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51701099, 51801044, and 51671071), the Natural Science Foundation of Heilongjiang Province of China (Grant No. LH2019E091), and Fundamental Research Funds in Heilongjiang Provincial Universities, China (Grant No. 135409320). Thanks to the help of Technology Innovation Center of Agricultural Multi-Dimensional Sensor Information Perception, Heilongjiang Province.

Effect of chemical ordering annealing on superelasticity of Ni-Mn-Ga-Fe ferromagnetic shape memory alloy microwires

Yanfen Liu(刘艳芬)1, Xuexi Zhang(张学习)2, Hongxian Shen(沈红先)2, Jianfei Sun(孙剑飞)2, Qinan Li(李奇楠)1, Xiaohua Liu(刘晓华)1, Jianjun Li(李建军)1, Weidong Cheng(程伟东)1   

  1. 1 Department of Physics, Qiqihar University, Qiqihar 161006, China;
    2 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2020-02-06 Online:2020-05-05 Published:2020-05-05
  • Contact: Yanfen Liu E-mail:lxylyf_0@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51701099, 51801044, and 51671071), the Natural Science Foundation of Heilongjiang Province of China (Grant No. LH2019E091), and Fundamental Research Funds in Heilongjiang Provincial Universities, China (Grant No. 135409320). Thanks to the help of Technology Innovation Center of Agricultural Multi-Dimensional Sensor Information Perception, Heilongjiang Province.

摘要: Ni50Mn25Ga20Fe5 ferromagnetic shape memory alloy microwires with diameters of ~30-50μm and grain sizes of ~2-5μm were prepared by melt-extraction technique. A step-wise chemical ordering annealing was carried out to improve the superelasticity strain and recovery ratio which were hampered by the internal stress, compositional inhomogeneity, and high-density defects in the as-extracted Ni50Mn25Ga20Fe5 microwires. The annealed microwires exhibited enhanced atomic ordering degree, narrow thermal hysteresis, and high saturation magnetization under a low magnetic field. As a result, the annealed microwire showed decreased superelastic critical stress, improved reversibility, and a high superelastic strain (1.9%) with a large recovery ratio (>96%). This kind of filamentous material with superior superelastic effects may be promising materials for minor-devices.

关键词: Ni-Mn-Ga-Fe microwire, chemical ordering annealing, martensite transformation, superelasticity

Abstract: Ni50Mn25Ga20Fe5 ferromagnetic shape memory alloy microwires with diameters of ~30-50μm and grain sizes of ~2-5μm were prepared by melt-extraction technique. A step-wise chemical ordering annealing was carried out to improve the superelasticity strain and recovery ratio which were hampered by the internal stress, compositional inhomogeneity, and high-density defects in the as-extracted Ni50Mn25Ga20Fe5 microwires. The annealed microwires exhibited enhanced atomic ordering degree, narrow thermal hysteresis, and high saturation magnetization under a low magnetic field. As a result, the annealed microwire showed decreased superelastic critical stress, improved reversibility, and a high superelastic strain (1.9%) with a large recovery ratio (>96%). This kind of filamentous material with superior superelastic effects may be promising materials for minor-devices.

Key words: Ni-Mn-Ga-Fe microwire, chemical ordering annealing, martensite transformation, superelasticity

中图分类号:  (Shape-memory effect; yield stress; superelasticity)

  • 62.20.fg
71.20.Lp (Intermetallic compounds) 81.30.Kf (Martensitic transformations)