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We use a reaction–diffusion model to demonstrate that buried interfaces in polycrystalline composites simultaneously reduce both the concentrations and the fluxes of radiation-induced defects. The steady-state radiation-induced defect concentrations, however, are highly sensitive to the interface sink strength η. Materials containing a large volume fraction of interfaces may therefore be resistant to multiple forms of radiation-induced degradation, such as swelling and hardening, as well as to embrittlement by solute segregation, provided that the interfaces have suitable η values.Center for Materials in Irradiation and Mechanical ExtremesUnited States. Dept. of Energy. Office of Basic Energy Sciences (Award No. 2008LANL1026

physical review. b, condensed matter and materials physics

Influence of interface sink strength on the reduction of radiation-induced defect concentrations and fluxes in materials with large interface area per unit volume