Phase Transformation Behaviors and Effects of Terbium in Polycrystalline Ni-Mn-Ga Magnetic Shape Memory Alloys
来源期刊：JOURNAL OF RARE EARTHS2004年第4期
论文作者：王新林 赵增祺 熊玮 吴双霞
Key words：metal materials; martensitic transformation; Ni-Mn-Ga alloy; rare earths;
Abstract: The phase transformation behaviors of two kinds of magnetic shape memory alloys Ni50Mn25+xGa25-x and Ni50Mn29Ga21-xTbx were studied. When the composition of Ni in these alloys was constant, increasing Mn and reducing Ga contents make martensitic transformation temperatures rise obviously. Simultaneously, thermal hysteresis of phase transformation reduce but Curie temperature unalters. When terbium was added, phase transformation temperature went up further and Curie temperature kept constant. The alloys still show strong ferromagnetism and properties of thermoelastic martensite phase transformation.
王新林1，赵增祺2，熊玮2，吴双霞2
(1.Central Iron and Steel Research Institute,Beijing 100081,China;
2.Baotou Research Institute of Rare Earth,Baotou 014010,China)
Abstract:The phase transformation behaviors of two kinds of magnetic shape memory alloys Ni50Mn25+xGa25-x and Ni50Mn29Ga21-xTbx were studied. When the composition of Ni in these alloys was constant, increasing Mn and reducing Ga contents make martensitic transformation temperatures rise obviously. Simultaneously, thermal hysteresis of phase transformation reduce but Curie temperature unalters. When terbium was added, phase transformation temperature went up further and Curie temperature kept constant. The alloys still show strong ferromagnetism and properties of thermoelastic martensite phase transformation.
Key words:metal materials; martensitic transformation; Ni-Mn-Ga alloy; rare earths;
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