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金属学报  2004, Vol. 40 Issue (9): 972-974     
  论文 本期目录 | 过刊浏览 |
Ni52Mn21+xGa27-x(x=0—5)磁性形状记忆合金的相变
郭世海 张羊换 李健靓 祁焱 王新林
郭世海(钢铁研究总院功能材料所; 北京 100081
Phase Transformation in Ni52Mn21+xGa27-x(x =0-5) Magnetic Shape Memory Alloys
GUO Shihai; ZHANG Yanghuan; LI Jianliang; QI Yan; WANG Xinlin
Department of Functional Material Research; Central Iron and Steel Research Institute; Beijing 100081
引用本文:

郭世海; 张羊换; 李健靓; 祁焱; 王新林 . Ni52Mn21+xGa27-x(x=0—5)磁性形状记忆合金的相变[J]. 金属学报, 2004, 40(9): 972-974 .
, , , , . Phase Transformation in Ni52Mn21+xGa27-x(x =0-5) Magnetic Shape Memory Alloys[J]. Acta Metall Sin, 2004, 40(9): 972-974 .

全文: PDF(6827 KB)  
摘要: 研究了非化学计量成分的多晶Ni52Mn21+xGa27-x(x=0—5)系列合金的热弹性马氏体相变和磁相变. 合金的马氏体相变温度Ms随Mn含量的增加而升高, 当x>4时, Ms已经升高到室温以上, 而马氏体相变滞后T随x的增大而减小; 合金的磁相变温度TC随x增加而升高, 但变化范围不大, 在x>2后, TC保持在348 K左右. 实验获得了一种具有实用前景的合金成分---Ni52Mn25Ga23合金, 其马氏体相变温度在室温以上,相变滞后仅为5 K.
关键词 Ni-Mn-Ga马氏体相变铁磁性相变     
Abstract:The martensitic and magnetic phase transformations in polycrystalline non-stoichiometric Ni52Mn21+xGa27-x(x=0-5) alloys were investigated. The experimental results show that the alloys exhibit ferromagnetic and thermo-elastic martensitic transformations. The martensitic transformation temperatures (Ms) increase with increasing Mn content and reach above room temperature when x>4. The martensitic transformation hysteresis (δT) decrease with increasing x. The magnetic phase transformation temperatures (Curie temperature TC increase with an increase of x within a small range and keep around 348 K when x>2. In addition, an alloy composition of Ni52Mn25Ga23 with potential practicality was obtained, which has a higher martensitic transformation temperature than room temperature and a transformation hysteresis of only 5 K.
Key wordsNi-Mn-Ga    martensitic transformation    ferromagnetic phase transformation
收稿日期: 2003-08-29     
ZTFLH:  TG139.6  
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