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Tb对多晶Ni_52.5Mn_23.5Ga₂₄合金马氏体相变和磁感生应变的影响

Effect of Tb on Martensitic Transformation and Magnetic-Field-Induced Strain in Polycystalline Ni_52.5Mn_23.5Ga₂₄ Alloy

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【Author】 LI Xue-mei~1,ZHAO Zeng-qi~2,WANG Hai-Xue~3,WU Shuang-xia~2,JIANG Li-ping~2,XIONG Wei~2 (1.School of Materials Science and Engineering,Inner Mongolia University of Science &Technology,Baotou 014010,China; 2.Baotou Research Institute of Rare Earths, Baotou 014010, China; 3.School of Materials Science and Engineering,Inner Mongolia Polytechnical University, Huhhut 010062,China)

【机构】内蒙古科技大学材料科学与工程学院；包头稀土研究院；内蒙古工业大学材料科学与工程学院；包头稀土研究院内蒙古　包头　014010；内蒙古　包头　014010；内蒙古　呼和浩特　010062；内蒙古　包头　014010；

【摘要】研究了添加不同量的Tb对多晶Ni52.5Mn23.5Ga24的马氏体相变和磁性能的影响,发现合金的马氏体相变温度显著提高,而在不加外应力的作用下合金的磁感生应变值却有所下降。更多还原

【Abstract】 Ferromagnetic Heusler alloy Ni₂MnGa has been developed as an advanced magnetic field control actuator material and used as magnetic field-controlled shape memory effect and magnetic-field-induced strain （MFIS）. However the martensitic transformation temperature of Ni₂MnGa is quite lower than room temperature. The martensitic transformation and magnetic properties of a polycrystalline alloy Ni_52.5Mn_23.5Ga₂₄ was investigated by adding different amount of Tb. The results show that martensitic transformation temperature was increased remarkably,while magnetic-field-induced strain was reduced.更多还原