合金化诱导方向相关的迁移率并改变小面晶界的迁移机制
Alloying induces directionally-dependent mobility and alters migration mechanisms of faceted grain boundaries
摘要：
刻面晶界表现出不寻常的偏析和迁移趋势。为了更深入地了解溶质原子在迁移过程中如何与多面界面结构相互作用，本研究探讨了Cu掺杂Ag原子的多面$Σ$ 11界面的迁移行为。溶质被发现隔离的小面与更多的自由体积和强烈降低边界速度在一个迁移方向，但不是其他的，由于存在一个方向依赖的运动机制，可以逃脱溶质钉扎，因此加快迁移。因此，这些模拟揭示了一种新的机制，化学诱导的各向异性的晶界迁移率。
英文摘要：
Faceted grain boundaries exhibit unusual segregation and migration tendencies. To gain a deeper understanding of how solute atoms interact with faceted interfacial structures during migration, this study probes the migration behavior of a faceted $Σ$11 boundary in Cu doped with Ag atoms. The solutes are found to segregate to the facet with more free volume and strongly reduce boundary velocity in one migration direction, but not the other, due to the presence of a directionally-dependent motion mechanism that can escape solute pinning and therefore speed up migration. Hence, a new mechanism of chemically-induced anisotropy in grain boundary mobility is uncovered by these simulations.
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