Effect of Ni excess on phase transformation temperatures of NiMnGa alloys

被引：149

作者：

Jiang, CB ^{[1
]}

Feng, G ^{[1
]}

Gong, SK ^{[1
]}

Xu, HB ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 342卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

martensitic transformation temperature; NiMnGa alloys; Ni substitution; martensitic transformation; magnetic shape memory alloys;

D O I：

10.1016/S0921-5093(02)00288-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A systematic substitution of Ni for Mn, Ga, or both Mn and Ga in the non-stoichiometric NiMnGa alloys is performed. The relationship among the composition, structure and martensitic transformation temperatures was studied in detail for the Ni excessive NiMnGa alloys. The martensitic transformation temperatures almost linearly increase with increasing Ni content in all the three series from lower than 0 degreesC up to 300 degreesC. The increases in rate of the martensitic transformation temperatures are different for the three cases. It is large for Ga substituted by Ni, slow for Mn and intermediate for both Mn and Ga. The size factor and electronic concentrations are thought to influence the martensitic transformation temperature in the NiMnGa alloys. The determined relationship will be significant for designing a suitable NiMnGa alloy with a required martensitic transformation temperature for application at a specific temperature. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：231 / 235

页数：5

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