|About this Abstract
||MS&T21: Materials Science & Technology
||Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
||Radiation Damage Suppression in AISI-316 Steel Nanoparticles: Implications for the Design of Future Nuclear Materials
||Emily Aradi, Matheus Tunes, Jacob Lewis-Fell, Graeme Greaves, Steven Donnelly, Jonathan Hinks
|On-Site Speaker (Planned)
Self-healing capability of defects introduced by energetic particle irradiation is a desired behaviour to be attained in the design of materials for application in extreme environments. Nanoporous materials have a potential for achieving higher radiation tolerance due to the presence of active unsaturable surfaces that may diffuse and thus effectively annihilate defects. The effects of heavy ion collisions in the lattice of AISI-316 steel nanoparticles (NPs)—which serve as a model for the ligaments in a nanoporous—are herein investigated in-situ within a transmission electron microscope. Compared with AISI-316 steel foils, fewer radiation-induced defect clusters form in the NPs. Scanning-TEM Post-irradiation characterization revealed that AISI-316 steel NPs may develop a radiation-induced self-passivation driven by a solute-drag mechanism: an effect that can potentially enhance their radiation-corrosion resistance in extreme conditions. The capability of an NP to self-heal irradiation-induced point defects is investigated using the cellular model for active internal sinks.