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多晶Ni-Mn-Ga磁性记忆合金的相变行为及稀土元素铽的作用

Phase Transformation Behaviors and Effect of Terbium in Polycrystalline Ni-Mn-Ga Magnetic Shape Memory Alloys

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【Author】 Zhao Zengqi~(1,2*), Xiong Wei~1, Wu Shuangxia~1, Huang Jimin~1, Zhou Yongbo~1, Wang Xinlin~2 (1. Baotou Research Institute of Rare Earth, Baotou 014010, China; 2. Department of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China)

【机构】包头稀土研究院；钢铁研究总院功能材料研究所内蒙古包头014010；钢铁研究总院功能材料研究所；北京100081；内蒙古包头014010；北京100081；

【摘要】研究了Ni50 Mn2 5+xGa2 5-x和Ni50 Mn2 9Ga2 1 -xTbx2种成分系列磁性记忆合金的相变行为。保持Ni含量不变 ,增加Mn ,降低Ga含量会使马氏体相变温度明显提高 ,同时相变滞后温区减小 ,居里温度基本不变。如果添加稀土元素铽 ,相变温度继续升高 ,居里温度仍然不变 ,材料继续保持强的铁磁性及热弹性马氏体相变的特征。更多还原

【Abstract】 Phase transformation behaviors were studied in two kinds of magnetic shape memory alloys Ni₅₀Mn_25+xGa_25-x and Ni₅₀Mn₂₉Ga_21-xTb_x. The martensitic transformation temperatures could be considerably increased by increasing Mn and decreasing Ga with fixed Ni content, while the temperature hysteresis becomes narrow and Curie temperature keeps constant. The transition temperatures increase continuously and the Curie temperature does not change with Tb addition. The alloys still keep their strong ferromagnetism and thermoelastic martensitic transformation characteristics.更多还原

【关键词】金属材料； Ni-Mn-Ga磁性记忆合金；热弹性马氏体相变；稀土；
【Key words】 metal materials； Ni-Mn-Ga MSM alloy； martensitic transformation； rare earths；

【基金】国家“8 63”计划资助项目 ( 2 0 0 1AA3 2 70 2 2 ) ;内蒙古自然科学基金资助项目 ( 2 0 0 3 0 80 2 0 2 14 )

【文献出处】中国稀土学报 ,Journal of The Chinese Rare Earth Society , 编辑部邮箱 ,2004年03期
【分类号】TM273
【被引频次】7
【下载频次】133

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