快淬Fe_(81)Ga_(19)合金薄带的相结构和磁致伸缩  

Phase Structure and Magnetostriction of Fe_(81)Ga_(19) Melt-Spun Ribbons

作　　者：王庆伟[1] 张晶晶[1] 马天宇[1] 严密[1] 

机构地区：[1]浙江大学硅材料国家重点实验室,浙江杭州310027

出　　处：《稀有金属材料与工程》2009年第7期1234-1237,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50701039);新世纪优秀人才支持计划(NCET-05-0526)资助

摘　　要：采用熔体快淬法制备Fe81Ga19合金薄带,研究薄带试样的相结构和磁致伸缩性能。XRD和M-TG结果表明,快淬态Fe81Ga19合金基体为Fe(Ga)无序固溶体相,并有微量非对称结构的DO3相析出,且薄带厚度方向[100]择优取向。当测量磁场垂直带面时,薄带试样沿带长方向的饱和磁致伸缩达–1830×10-6。Fe81Ga19合金薄带的巨磁致伸缩与其大的形状各向异性、熔体快淬时合金内部形成的非对称结构的DO3相及薄带厚度方向[100]择优取向相关。Fe81Ga19 alloy ribbons were prepared by melt-spinning. The phase structure and magnetostriction of ribbon samples were investigated by XRD and M-TG. The results show that the matrix of Fe81Ga19 ribbons was disordered Fe（Ga） solid solution, accompanied with a small amount of the second phase maintaining an unsymmetrical DO3 structure. The [100] preferred orientation was formed along the thickness direction. The maximum magnetostricton of -1830×10^-6 was obtained when the magnetic field was applied normal to the ribbon plane. The shape anisotropy of ribbons, the unsymmetrical 003 structure and the [100] preferred orientation are suggested to be responsible for the giant magnetostriction.

关 键 词：Fe81Ga19合金 熔体快淬 磁致伸缩 DO3相 

分 类 号：TG131[一般工业技术—材料科学与工程]