Figure 1 : Formation of dislocation-originated SFT.

From: Atomic-scale dynamic process of deformation-induced stacking fault tetrahedra in gold nanocrystals

Figure 1

(a) Crystallographic orientation of the Au nanowire embedded with a TB. The nanowire diameter is about 16 nm. (bf) Sequential HRTEM images showing the evolution of dislocation structure and the formation of a dislocation-originated SFT via the interactions of partial dislocations under [111] tensile loading. Upon tensile loading, the partial dislocations with SFs nucleate sequentially from the free surface on the equivalent inclined {111} planes and interact with each other, forming a wedge (c) and then a zigzag (d) dislocation structure. (e) At 380 s, SF3 propagates and annihilates at the free surface, leaving behind the wedge structure. The inset shows the enlarged HRTEM image of the wedge structure (yellow dashed line). (f) The wedge dislocation structure further evolves into a triangular defect, which is identified to be an SFT. The inset marks out the SFT by a yellow triangle. Scale bar, 5 nm.