Undulating slip in Laves phase and implications for deformation in brittle materials.
Undulating slip in Laves phase and implications for deformation in brittle materials.
复制标题
DOI：
10.1103/physrevlett.106.165505
复制
发表时间：
2011-04
影响因子：
8.6
通讯作者：
Wei Zhang;R. Yu;K. Du;Zhiying Cheng;Jing Zhu;H. Ye
中科院分区：
文献类型：
--
作者：
Wei Zhang;R. Yu;K. Du;Zhiying Cheng;Jing Zhu;H. Ye
通过结合密度泛函理论计算和像差校正透射电子显微镜，位错在Laves相（一种典型的复杂金属间化合物）显示在波动路径滑动。在滑移过程中，位错核分别在弱束缚面和相邻的强束缚面之间上下跳跃，进行滑动和原子变换。这与传统的简单金属滑移过程不同，后者在单一平面内是连续的，如广义层错能范式所描述的那样。
By combining density-functional theory calculations and aberration-corrected transmission electron microscopy, dislocations in Laves phase (a typical complex intermetallic compound) are shown to slip in an undulating path. During the slip, the dislocation cores jump up and down between a weakly bound plane and an adjacent strongly bound plane for gliding and atomic shuffling, respectively. This is different from the conventional slip process in simple metals, which is continuous within a single plane, as described in the paradigm of the generalized stacking fault energy.