Segregation of voids in a spatially heterogeneous dislocation microstructure

摘要: We investigate the dynamics of nucleation and growth voids in an irradiated material presence a spatially heterogeneous dislocation microstructure. find that, due to sensitivity void rate local vacancy supersaturation, nucleate grow almost exclusively regions where density dislocations is low. Numerical simulations show that relatively high rates observed experimentally low density, leading segregated evolution voids, can be naturally described by solutions reaction-diffusion model takes continuous into account but does not assume occurrence long-range one-dimensional transport clusters self-interstitial atoms through material.