Figure 2: Comparison of heating effect on hydrogen-free and hydrogenated pillars.
From: Effect of hydrogen on the integrity of aluminium–oxide interface at elevated temperatures
(a,b) The morphological change of a hydrogen-free pillar. At room temperature (a), the interior of the pillar shows high density of dislocations that are annealed out after heating up to 200 °C (b). After heating, a clean interior and smooth thickness contours are observed. (c,d) The morphological change of a hydrogenated pillar. Besides annealing, a giant cavity formed at the top of the pillar. Scale bar, 200 nm.
