Fig. 4: In-situ observations of impact events using diamond impactors along with the corresponding confocal images.

A Snapshots of a polished diamond impacting a nickel target at 2.4 m s−1. B The corresponding confocal image of the indent produced (A). C Snapshots of a microfabricated diamond impacting a Ni-20 wt.% Cu target at 22 m s−1. D The corresponding confocal image of the indent produced in (C).