Distribution of alloying elements and the corresponding structural evolution of Mn–Sb alloys in high magnetic field gradients
Distribution of alloying elements and the corresponding structural evolution of Mn–Sb alloys in high magnetic field gradients
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DOI：
10.1557/jmr.2010.0226
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发表时间：
2010-09
影响因子：
2.7
通讯作者：
Tie Liu;Qiang Wang;Ao Gao;Hongwei Zhang;Kai Wang;Jicheng He
中科院分区：
文献类型：
--
作者：
Tie Liu;Qiang Wang;Ao Gao;Hongwei Zhang;Kai Wang;Jicheng He
详细研究了磁场梯度中合金元素的分布及相应的Mn-Sb合金的组织演变。结果表明，在凝固过程中，高磁场梯度可以控制合金中溶质元素的分布，从而导致初生MnSb和Sb相同时存在或初生MnSb的聚集，形貌发生连续变化。这些初级相的位置取决于场梯度的方向。高磁场梯度对溶质元素分布的控制是通过磁浮力驱动Mn元素在熔体中的迁移来实现的，这源于Mn和Sb之间磁化率的差异。这种控制的有效性取决于合金成分、试样尺寸、冷却速度和B d B /d z值。
The distribution of alloying elements and the corresponding structural evolution of Mn–Sb alloys in magnetic field gradients were investigated in detail. It was found that a high magnetic field gradient could control the distribution of solute element in the alloys during the solidification process and therefore resulted in the coexistence of both primary MnSb and Sb phases or the aggregation of the primary MnSb with a continuous change in morphology. The positions where these primary phases located depended on the direction of field gradient. The control of the solute element distribution by a high magnetic field gradient was realized through the magnetic buoyancy force that could drive the migration of Mn element in the melt, originating from the difference in the magnetic susceptibility between Mn and Sb. The effectiveness of this control depends on the alloy composition, specimen dimension, cooling rate, and B d B /d z value.