粘结NiMnGaSi合金的结构、相变和大磁致应变研究  

An investigation of structure transformation and giant magnetic-field-induced strain in bonded NiMnGaSi alloy

作　　者：蔡培阳[1] 冯尚申[1] 薛双喜[1] 周英[1] 陈卫平[1] 

机构地区：[1]台州学院物理与电子工程学院,台州318000

出　　处：《材料研究学报》2009年第3期327-331,共5页Chinese Journal of Materials Research

基　　金：浙江省科技厅2006C21085重点资助项目~~

摘　　要：采用还原扩散方法制备了NiMnGaSi合金粉末,并粘结成磁体。磁测量表明粘结磁体的马氏体相变开始温度M_S为308 K,居里温度T_C为358 K。磁致应变测量发现粘结NiMnGaSi磁体在300 K、0.7 T的磁场下具有0.56%大磁致应变。NiMnGaSi alloy powder was prepared by diffusion-reduction method and then bonded and shaped a cuboid. The magnetic properties of the sample show that a martensitic transformation starts at 308 K and the Curie temperature is 358 K. The NiMnGaSi alloy shows a 0.56% giant strain at room temperature under a magnetic field of 0.7 T.

关 键 词：金属材料 还原扩散法 粘结 马氏体相变 磁致应变 NiMnGa合金 

分 类 号：TG139[一般工业技术—材料科学与工程]