磁驱动相变材料研究进展  

Progress of Magnetic Field-Driven Phase Transformation Materials

作　　者：聂志华[1] 王沿东[1] 刘冬梅[2] 

机构地区：[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

出　　处：《中国材料进展》2012年第3期15-25,43,共12页Materials China

基　　金：科技部973计划项目(2012CB619405);国家自然科学基金面上项目(50971031);国家自然科学基金青年基金项目(51001015)

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。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 mar- tensitic variants caused by the magnetic field-induced twin boundary motion and shape memory effect via magnetic field-in- duced 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 materi- als, 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 trans- formation alloy are prospected.

关 键 词：磁驱动相变 磁感生应变 马氏体相变 形状记忆合金 超弹性 

分 类 号：TG139.6[一般工业技术—材料科学与工程]