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金属学报  2004 

Ni52Mn21+xGa27-x(x=0—5)磁性形状记忆合金的相变

, PP. 972-974

Keywords: Ni-Mn-Ga,马氏体相变,铁磁性相变

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Abstract:

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348K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5K.

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