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

doi:10.1088/1674-1056/20/4/047503

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.

Keywords: ferromagnetic shape memory alloys magnetic properties martensitic transformations spark plasma sintering

Received: 18 November 2010
Revised: 04 December 2010
Accepted manuscript online:

PACS:	75.50.Cc	(Other ferromagnetic metals and alloys)
	81.30.Kf	(Martensitic transformations)
	64.70.kd	(Metals and alloys)

Fund: 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).

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Tian Xiao-Hua(田晓华), Sui Jie-He(隋解和), Zhang Xin(张欣), Feng Xue(冯雪), and Cai Wei(蔡伟) Microstructural, phase transformation and magnetic properties of Ni–Mn–Ga alloy fabricated by spark plasma sintering 2011 Chin. Phys. B 20 047503

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

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