Abstract μ topologically close-packed phase commonly forms in superalloys and its intrinsic deformation is critical for their performance. Atomic configurations of planar defects in μ phase have been investigated by aberration-corrected scanning transmission electron microscopy and geometrical structure analysis. It is found that the basal slip in μ phase is accomplished by synchroshear inside Laves triple-layers, whereas shear deformations on non-basal planes are associated with long-range diffusions or local atomic rearrangements. Distinct from that on (1 1 ¯ 02) pyramidal planes, displacement vectors of planar faults on ( 1 ¯ 101) pyramidal planes deviate from the slip plane, leading to the contraction or dilation faulted regions.

中文翻译：

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镍基高温合金中 μ 相平面缺陷的原子构型

摘要 μ 拓扑密堆积相通常在高温合金中形成，其内在变形对其性能至关重要。已经通过像差校正的扫描透射电子显微镜和几何结构分析研究了 μ 相中平面缺陷的原子构型。发现 μ 相的基底滑移是通过 Laves 三层内部的同步剪切实现的，而非基底平面上的剪切变形与长程扩散或局部原子重排有关。与(1 ¯ 02) 锥面不同, ( 1 ¯ 101) 锥面上平面断层位移矢量偏离滑移面, 导致断层收缩或扩张。