磁驱动相变材料研究进展-中国材料进展

文章信息/Info

作者:: 聂志华1; 王沿东1; 刘冬梅2; (1.北京理工大学材料学院，北京 100081)
(2.北京有色金属研究总院有色金属材料制备加工国家重点实验室，北京 100088)

Author(s):: NIE Zhihua 1; WANG Yandong 1; LIU Dongmei 2; (1.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China)
(2.State Key Laboratory for Fabrication and Processing of Nonferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China)

摘要:: 磁驱动相变材料利用外磁控制下铁弹马氏体变体重排或磁诱导一级相变产生的形状记忆效应来捕获应变，兼具铁弹形状记忆与磁致伸缩功效特征。Heusler型NiMn X ( X =Ga 或In)系磁驱动相变合金材料具有磁感生应变大、能量密度高、反应速度快等优点，是未来重要磁传感器和磁驱动器研制的关键。主要介绍了国内外Ni Mn Ga、Ni Co Mn In、反铁磁体等磁驱动相变材料的研究进展，以及本课题组利用高能X射线衍射和中子散射技术对磁驱动相变材料的原位研究。最后，展望了磁驱动相变合金材料的发展趋势。

Abstract:: Magnetic field driven phase transformation material is a class of smart material which combines the functional behaviors of ferroelastic shape memory and magnetostriction. The large magnetic fieldinduced strain obtained in magnetic field driven phase transformation materials can be achieved through two mechanisms, which include reorientation of martensitic variants caused by the magnetic field induced twin boundary motion and shape memory effect via magnetic field induced first order phase transformation. Heuslertype Ni Mn X ( X= Ga or In) magnetic field driven phase transformation alloys are potential candidates for magnetic sensors and actuators, owing to their large magnetic fieldinduced strain, high energy density and rapid response and so on. The research progresses of magnetic fielddriven phase transformation materials, including Ni Mn Ga alloys, Ni Co Mn In alloys and antiferromagnets, are summarized. And recent researches from our group are introduced, which are focused on in situ studies of magnetic field driven phase transformation materials using highenergy xray diffraction and neutron scattering techniques. At last, future trends of magnetic field driven phase transformation alloy are prospected.