The nanoengineering of materials for enhanced radiation damage tolerance by increasing the density of defect sinks and recombination centres has been investigated in nanograined, nanolayered, nanoporous, and nanodispersion-strengthened materials. For example, in a nanoporous material an interconnected network of ligaments forms a structure in which the surface-area-to-volume ratio, RSV, is high and the distance to the nearest surface is always short. These surfaces act as insaturable sinks at which defects can annihilate and mobile gas atoms escape. This is particularly important in nuclear materials where neutron irradiation can induce the creation of vacancies and interstitials via atomic displacements as well as the introduction of insoluble gases such as helium from (n,α) reactions.
|Number of pages
|Microscopy and Microanalysis
|Published - 1 Aug 2019
|Microscopy & Microanalysis 2019 Meeting - Portland, United States
Duration: 4 Aug 2019 → 8 Aug 2019