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. 2023 Feb 22;14:988. doi: 10.1038/s41467-023-36588-9

Fig. 3. Preferential growth of wormholes in the diffusion-induced grain boundary migration (DIGM) zone.

Fig. 3

ac EBSD evidence showing rugged grain boundaries (GBs) after DIGM. d Evidence of salt penetration: SEM imaging shows that salt exists on the backside of the 30-μm-thick foil sample. e Representative SEM image corresponding to the boxed area in (b), which shows a rugged GB after molten salt corrosion. f Schematic drawing of the key features in (e). g STEM-HAADF image, STEM-EDX mapping, and SAED evidence for DIGM. h Schematic illustration of the DIGM process and the preferential growth of wormholes in the DIGM zone.