Lawrence Livermore National Laboratory



Research

Our objective is to understand the characteristics of an "optimal" grain boundary (GB) 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.

Photo of Geoffrey Campbell

Geoffrey Campbell

campbell7@llnl.gov  

Principal Investigator for Laser Crystallization of Phase Change Material