【作者】 江丽萍； 沙玉辉； 李松； 吴双霞； 赵增祺； 赵骧； 左良；

【Author】 Jiang Liping, Sha Yuhui, Li Song, Wu Shuangxia, Zhao Zengqi, Zhao Xiang, Zuo Liang (School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; Baotou Research Institute of Rare Earth , Baotou 014010, China)

【机构】 东北大学材料与冶金学院； 包头稀土研究院；

【摘要】 考察了<410>取向Tb0.3Dy0.7Fe1.95多晶合金磁场热处理中磁场施加方向、冷却方式以及温度等参数对其磁致伸缩性能的影响。研究发现,磁场垂直样品轴向施加可提高中、高场磁致伸缩系数,而低场磁致伸缩系数基本保持不变;同时d₃₃^max较高且对应的磁场较低。磁场平行样品轴向施加显示相反的影响,而冷却阶段撤去磁场则使磁场的作用减弱。在略低于居里点的温度采用磁场垂直样品轴向且冷却段保持磁场的方式,可以有效改善综合磁致伸缩性能。更多还原

【Abstract】 The effects of magnetic field direction, cooling mode and annealing temperature in the magnetic heat treatment on magnetostriction of <110> -oriented Tb0.3Dy0.7Fe1.95 polycrystal alloy were investigated. It is found that application of magnetic field vertical to specimen axis can increase magnetostriction coefficients at medium and high measuring field and keep low-field magnetostriction coefficient unchanged, meanwhile it can also produce a larger maximum （d₃3^max） and smaller corresponding magnetic field. The inverse effects occur as magnetic field was applied parallel to specimen axis, and cooling without magnetic field can make the effects of magnetic heat treatment weakened. It can be concluded that the magnetic heat treatment at the temperature slightly lower than Curie point with magnetic field vertical to specimen axis and cooling with magnetic field remained can approve the magnetostriction property effectively.更多还原