Al掺杂对Fe_(81)Ga_(19)合金相结构和磁致伸缩性能的影响  

Effect of Al doping on phase structure and magnetostrictive properties of Fe_(81)Ga_(19) alloy

作　　者：郝宏波[1] 李晓 龚沛[2] 魏宗英 乔禹[1] 姚特 梁雨萍 王婷婷[1] HAO Hongbo;LI Xiao;GONG Pei;WEI Zongying;QIAO Yu;YAO Te;LIANG Yuping;WANG Tingting(Baotou Research Institute of Rare Earths, Baotou 014030, China;School of Materials Science and Engineering, Inner Mongolia University of Technology,Hohhot 010051, China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]内蒙古工业大学材料科学与工程学院,呼和浩特010051

出　　处：《功能材料》2022年第5期5231-5236,共6页Journal of Functional Materials

基　　金：内蒙古自然科学基金重大项目(2018ZD10);内蒙古关键技术攻关项目(2021GG0245)。

摘　　要：实验选取非自耗真空电弧炉熔炼合金锭,并对合金的相结构及磁致伸缩性能进行研究。研究结果表明,在Fe-Ga合金中掺入Al元素来替代Ga元素的占位后,Fe_(81)Ga_(19-x)Al_(x)合金仍然以A2相为主,其基本结构为α-Fe体心立方结构,晶粒由之前细长的不规则多边形变为长条状的柱状晶,并且柱状晶的取向性显著增强;当x=3.5时合金的饱和磁致伸缩值为202×10^(-6),约为x=0时的4倍。磁致伸缩性能的提高主要归因于掺Al后Fe-Ga合金的A2相沿[100]的择优取向以及Al原子进入Fe-Ga合金晶格引起的晶格畸变。In this experiment,non-consumable vacuum arc furnace was selected to melt the alloy ingot,and the phase structure and magnetostrictive properties of the alloy were studied.The results show that the Fe_(81)Ga_(19-X)Al_(X) alloy is still dominated by A2 phase after the addition of Al element to the Fe-Ga alloy to replace the occupying of Ga element.The basic structure of the alloy isα-Fe core cubic structure,and the grains change from slender irregular polygons to long columnar crystals,and the orientation of the columnar crystals is significantly enhanced.When x=3.5,the saturation magnetostrictive value of the alloy is 202×10^(-6),which is about four times of that when x=0.The improvement of magnetostrictive properties is mainly attributed to the preferred orientation of phase A2 along[100]of Fe-Ga alloy doped with Al and the lattice distortion caused by Al atom entering the lattice of Fe-Ga alloy.

关 键 词：Fe-Ga-Al合金 元素添加 相结构 磁致伸缩 

分 类 号：TB34[一般工业技术—材料科学与工程]