Using a newly developed nanoscale deformation device, atomic scale and time-resolved dislocation dynamics have been captured in situ under a transmission electron microscope during the deformation of a Pt ultrathin film with truly nanometer grains (diameter d<∼10nm). We demonstrate that dislocations are highly active even in such tiny grains. For the larger grains (d∼10nm), full dislocations dominate and their evolution sometimes leads to the formation, destruction, and reformation of Lomer locks. In smaller grains, partial dislocations generating stacking faults are prevalent.
ASJC Scopus subject areas
- Physics and Astronomy(all)