Our objective is to understand the characteristics of an “optimal” grain boundary network that minimizes microstructural evolution in radiation environments. Through our research, we have elucidated that this optimal network requires a balance between two populations of grain boundaries: low-free-volume (low-free-energy) special interfaces that, appropriately coordinated, prevent coarsening; and low-crystallographic-order (high-free-energy) random grain boundaries that are efficient sinks for radiation-induced defects.
Rapid in situ phase transformations
Dynamic Transmission Electron Microscope (DTEM) quantifies kinetics of rapid phase transitions with time-resolved images.
Principal Investigator for Laser Crystallization of Phase Change Material
campbell7 [at] llnl.gov