Phase-field model of solute trapping during solidification.
Phase-field model of solute trapping during solidification.
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DOI：
10.1103/physreve.47.1893
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
A. A. Wheeler-A.;W. Boettinger;G B McFadden
中科院分区：
文献类型：
--
作者：
A. A. Wheeler-A.;W. Boettinger;G B McFadden
开发了二元合金等温凝固的相场模型，其中包括相场和成分场的梯度能量贡献。当相场的梯度能量系数小于溶质场的梯度能量系数时，平面稳态解表现出在前进前沿（溶质捕获）之前液相中预测的偏析减少，并且在高凝固速度的限制下，预测合金凝固而没有成分重新分布。这种情况在实验中经常观察到。
A phase-field model for isothermal solidification of a binary alloy is developed that includes gradient energy contributions for the phase field and for the composition field. When the gradient energy coefficient for the phase field is smaller than that for the solute field, planar steady-state solutions exhibit a reduction in the segregation predicted in the liquid phase ahead of an advancing front (solute trapping), and, in the limit of high solidification speeds, predict an alloy solidification with no redistribution of composition. Such situations are commonly observed experimentally.