|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Hume-Rothery Award Symposium: Alloy Phase Chemistry at the Atomic Level - Opportunities and Challenges
||Kinetic Pathways in Phase Separation Processes: Atom-Probe Tomography versus Modeling
||Didier Blavette, Isabelle Mouton, Thomas Philippe, Manon Bonvallet
|On-Site Speaker (Planned)
Because of its 3D imaging capabilities at the atomic scale, atom probe tomography (APT) has played a major role in the investigation of the early stages of phase separation in solids. 3D reconstructions can be confronted at the same scale to kinetic Monte-Carlo simulations conducted on rigid lattice. This dual approach has been applied to phase separation in self-organised GeMn magnetic thin films. In this talk, APT results will be confronted to simulations but also to analytical models dealing with precipitation kinetics (non-classical nucleation showing enrichment of nuclei during nucleation process, non-classical kinetic pathway during coarsening in ternary systems…). A recently developed analytical model dealing with nucleation, growth and coarsening in ternary systems including diffusion coupling between chemical species has revealed that the kinetic pathway does not necessarily follow the tie lines of phase diagram in agreement with APT experiments on model nickel base superalloys.
||Planned: Supplemental Proceedings volume