Figure 4
From: Understanding Tribofilm Formation Mechanisms in Ionic Liquid Lubrication
Worn surface on the steel ball lubricated by the neat base oil and the collected wear debris particles. (a) SEM image of the ball wear scar with a 2D profile (marked protrusion indicating adhesive material buildup). (b) Cross-sectional BF-STEM images of the worn surface showing a thin iron oxide film and an adhesive material buildup. (c) BF-STEM images of aggregated wear debris particles, with a magnified view of a cluster of fine nanoparticles. EDS elemental maps indicating mixed iron oxides and metallic iron.
