In situ observation of nano-abrasive wear

We have studied the nano-scale wear behavior using an in situ nanoindentation device in a transmission electron microscope. Nano-scale sliding experiments were conducted under TEM. In order to trigger localized changes, we used a gold-coated diamond indenter to slide against single crystal silicon (1 0 0). With the movement of the indenter, cracks along the elastic strain contours in the silicon were observed. Energy analysis was carried over possible mechanisms. It was observed that the onset of abrasive wear was due to cracks formation along the contour. Analysis of the possible mechanisms that lead to the abrasive wear is presented. Observations are presented as initial work into experimentally observing the fundamental mechanisms.