Crystal orientation induced by high magnetic fields during peritectic reaction of alloys
Crystal orientation induced by high magnetic fields during peritectic reaction of alloys
复制标题
合金包晶反应过程中强磁场诱导的晶体取向
DOI：
10.1016/j.matchar.2021.111608
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发表时间：
2021-11
影响因子：
4.7
通讯作者：
Qiang Wang
中科院分区：
文献类型：
--
作者：
Meng Dong;Tie Liu;Xiaoyu Guo;Shulin Dong;Lei Li;Jun Wang;Jinshan Li;Lijia Zhao;Qiang Wang
以Tb0.27Dy0.73Fe1.95为模型合金，制备了具有择优取向的(Tb，Dy)Fe2和(Tb，Dy)Fe3相。我们研究了在强磁场下决定包晶合金择优取向的机制。调整制备工艺参数，得到了四种Tb0.27Dy0.73Fe1.95合金，其包晶(Tb，Dy)Fe2相的<；110>；、<；111>；、<；112>；和<；113>；方向与强磁场平行。对应的初级(Tb，Dy)Fe3相的方向与磁场平行。推导了(Tb，Dy)Fe3和(Tb，Dy)Fe2相的取向关系(1‘11)//(0001)和[110]//[11 2’0]。生长速度和强磁场不改变这两相的取向关系。强磁场诱导初生(Tb，Dy)Fe3相旋转，进而影响包晶(Tb，Dy)Fe2相的取向。磁矩引起了垂直于磁场的{0001}面的堆积，这意味着(Tb，Dy)Fe3相的c轴平行于磁场。此时，(Tb，Dy)Fe2相的{111}面垂直于磁场生长，这反映在(Tb，Dy)Fe2相沿111>；方向的择优取向上。
Abstract Using Tb 0.27 Dy 0.73 Fe 1.95 as a model alloy, we generate (Tb, Dy) Fe 2 and (Tb, Dy) Fe 3 phases with preferred orientations. We study the mechanism that determines the preferred crystal orientation of a peritectic alloy under high magnetic fields. Adjusting the preparation parameters yields four Tb 0.27 Dy 0.73 Fe 1.95 alloys with respective< 110>,< 111>,< 112>, and< 113> directions of the peritectic (Tb, Dy) Fe 2 phase parallel to the high magnetic field. The< 11 2¯ 0>,< 0001>,< 10 1¯ 0>, and< 10 1¯ 3¯> directions of the corresponding primary (Tb, Dy) Fe 3 phase are parallel to the magnetic field. We deduce the orientation relationships (1¯ 11)//(0001) and [110]//[11 2¯ 0] for the (Tb, Dy) Fe 3 and (Tb, Dy) Fe 2 phases. The growth velocity and high magnetic field do not change the orientation relationships of these two phases. The high magnetic field induces the rotation of the primary (Tb, Dy) Fe 3 phase and then affects the orientation of the peritectic (Tb, Dy) Fe 2 phase. Magnetic torque induces stacking of the {0001} plane perpendicular to the magnetic field, meaning the c-axis of the primary (Tb, Dy) Fe 3 phase aligns parallel to the field. At this time, the {111} plane of the (Tb, Dy) Fe 2 phase grows perpendicular to the magnetic field, as reflected in the preferred orientation of the (Tb, Dy) Fe 2 phase along the< 111> direction.