稀土元素掺杂对Fe-Ga合金性能影响的研究进展  

Research progress on effects of rare earth dopingon properties of Fe-Ga alloys

作　　者：杜金超 牟星 郭世海[1] 徐立红[1] 祁焱[1] 赵栋梁[1] DU Jinchao;MU Xing;GUO Shihai;XU Lihong;QI Yan;ZHAO Dongliang(Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]钢铁研究总院有限公司功能材料研究院,北京100081

出　　处：《金属功能材料》2024年第6期48-57,共10页Metallic Functional Materials

基　　金：国家重点研发计划项目(2021YFB3501403)。

摘　　要：Fe-Ga合金的饱和磁致伸缩系数低于稀土超磁致伸缩材料,但该材料驱动磁场低、抗拉强度高而且原材料成本低,是一类重要的磁驱动智能材料。近年来,研究发现微量稀土元素掺杂能显著提高Fe-Ga合金的磁致伸缩系数,同时还能兼顾力学性能和阻尼性能的改善。关于稀土掺杂导致Fe-Ga合金大磁致伸缩效应的机制、合金力学性能强化机制、合金阻尼性能提升机制等方面的研究是当前的热点内容。因此,首先综述稀土元素种类和制备工艺对Fe-Ga合金磁致伸缩性能的影响,然后从合金相结构、晶体取向等方面分析了稀土元素掺杂导致大磁致伸缩效应的理论机制,再从第二相强化角度解释了稀土元素掺杂引起的强韧化机制,最后概述稀土元素掺杂对阻尼性能的影响,同时对下一步研究进行了展望。Although the saturation magnetostrictive coefficient of Fe-Ga alloys is lower than that of rare earth giant magnetostrictive material,they possess a low driving magnetic field,high tensile strength and low raw material cost,thus served as a momentous magnetic driving smart material.In recent years,researches have shown that the addition of trace rare earth elements can significantly improve the magnetostriction coefficient of Fe-Ga alloys,and simultaneously ameliorate the mechanical properties and damping properties.The investigation on the mechanism of the large magnetostrictive effects of Fe-Ga alloys caused by rare earth doping,the mechanism of strengthening the mechanical properties of the alloys,and the mechanism of enhancing the damping properties of the alloys are the current research hotspots.Therefore,the effects of rare earth elements and the preparation process on magnetostrictive properties of Fe-Ga alloys are firstly overviewed in this paper,and then the theoretical mechanism of the large magnetostrictive effect resulted from rare earth elements doping is analyzed from the aspects of alloy phase structure and crystal orientation.Additionally,the strengthening and toughening mechanism attributed to rare earth doping is interpreted in detail from the second phase strengthening mechanism.Finally,the influence of rare earth element doping on damping performance is summarized,and the future research is prospected.

关 键 词：FE-GA合金 稀土掺杂 磁致伸缩 力学性能 阻尼性能 

分 类 号：TG1[金属学及工艺—金属学]