中国物理B ›› 2011, Vol. 20 ›› Issue (4): 47503-047503.doi: 10.1088/1674-1056/20/4/047503

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Microstructural, phase transformation and magnetic properties of Ni–Mn–Ga alloy fabricated by spark plasma sintering

隋解和1, 张欣1, 冯雪1, 蔡伟1, 田晓华2   

  1. (1)School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (2)School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China
  • 收稿日期:2010-11-18 修回日期:2010-12-04 出版日期:2011-04-15 发布日期:2011-04-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 50971052) and the Scientific Research Fund of Heilongjiang Provincial Education Department of China (Grant No. 11531059).

Microstructural, phase transformation and magnetic properties of Ni–Mn–Ga alloy fabricated by spark plasma sintering

Tian Xiao-Hua(田晓华)a)b), Sui Jie-He(隋解和) a), Zhang Xin(张欣)a), Feng Xue(冯雪)a), and Cai Wei(蔡伟) a)†   

  1. a School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; b College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China
  • Received:2010-11-18 Revised:2010-12-04 Online:2011-04-15 Published:2011-04-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 50971052) and the Scientific Research Fund of Heilongjiang Provincial Education Department of China (Grant No. 11531059).

摘要: The microstructural, phase transformation and magnetic properties of Ni-Mn-Ga alloy fabricated using the spark plasma sintering method have been investigated. The results show that both the as-sintered and annealed sintered specimens exhibit typical martensitic transformation behaviours. The martensite of the sintered specimen after annealing exhibits a ferromagnetic nature. Moreover, study of the fracture surface indicates that the transgranular fracture contributes to the higher ductility of sintered Ni-Mn-Ga alloy. In addition, the transformation strain in sintered Ni-Mn-Ga alloy is studied for the first time.

关键词: ferromagnetic shape memory alloys, magnetic properties, martensitic transformations, spark plasma sintering

Abstract: The microstructural, phase transformation and magnetic properties of Ni–Mn–Ga alloy fabricated using the spark plasma sintering method have been investigated. The results show that both the as-sintered and annealed sintered specimens exhibit typical martensitic transformation behaviours. The martensite of the sintered specimen after annealing exhibits a ferromagnetic nature. Moreover, study of the fracture surface indicates that the transgranular fracture contributes to the higher ductility of sintered Ni–Mn–Ga alloy. In addition, the transformation strain in sintered Ni–Mn–Ga alloy is studied for the first time.

Key words: ferromagnetic shape memory alloys, magnetic properties, martensitic transformations, spark plasma sintering

中图分类号:  (Other ferromagnetic metals and alloys)

  • 75.50.Cc
81.30.Kf (Martensitic transformations) 64.70.kd (Metals and alloys)