Figure 3
From: Faceting–roughening transition of a Cu grain boundary under electron-beam irradiation at 300 keV
Sequential HRTEM images showing microstructural evolution of a GB region after beam irradiation with a beam diameter of 25 nm corresponding to a current density of ~ 815 A cm–2 for 3 min 38 s. (a) Low-magnification image showing GB migration from [1 0 0] to [1 1 0]. The irradiation diameter of 25 nm is marked by a dashed circle. (b) Enlarged image of the boxed region of (a), which shows that the region was faceted into atomically sharp (0 1 0)//(1 –1 0) and {1 1 1} components.
