|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||F-8: Self-organization of Helium Precipitates into Elongated Channels within Metal Nano-layers
||Di Chen, Nan Li, Dina Yuryev, Kevin Baldwin, Michael Demkowicz, Yongqiang Wang
|On-Site Speaker (Planned)
We explore He precipitation within a nano-layer of Cu sandwiched between two V layers. We show that implanted He precipitates confined within nano-scale metal layers depart from their classical growth trajectories: they self-organize into elongated channels, rather than growing as equiaxed bubbles or voids. These channels form via templated nucleation of He precipitates along layer surfaces followed by their growth and spontaneous coalescence into stable precipitate lines. We have conducted in situ TEM heating studies to investigate how those channels the detailed evolution of these channels in time. Our findings suggest new methods for manipulating He aggregation using nanoscale confinement and shed new light on the dynamics of He precipitation in metals.
||Planned: Supplemental Proceedings volume