Fig. 2: Surface and subsurface SEM images of undamaged, 12.5 GWm−2 damaged, and 46.3 GWm−2 damaged samples.
From: Morphological and nanomechanical changes in tungsten in high heat flux conditions

Arrows are indicating transient layers.
From: Morphological and nanomechanical changes in tungsten in high heat flux conditions

Arrows are indicating transient layers.