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

ISSN号：1674-1056
期刊名称：《中国物理B：英文版》
分类：TG139.6[金属学及工艺—合金;一般工业技术—材料科学与工程;金属学及工艺—金属学] TB383[一般工业技术—材料科学与工程]
作者机构：[1]School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China, [2]College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China
相关基金：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）

作者：田晓华[1,2], 隋解和[1], 张欣[1], 冯雪[1], 蔡伟[1]

关键词：放电等离子烧结法, 镍锰镓合金, 相变行为, 制备性能, 磁性质, 微结构, 微观结构, 穿晶断裂, ferromagnetic shape memory alloys, magnetic properties, martensitic transformations spark plasma sintering

中文摘要：

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.

英文摘要：

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 con- tributes 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.

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