About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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2020 Technical Division Student Poster Contest
|
Presentation Title |
SPU-6: Surface, Interface, and Temperature Effects on the Phase Separation and Nanoparticle Self Assembly of Bi-Metallic Ni0.5Ag0.5: A Molecular Dynamics Study |
Author(s) |
Reece C. Emery, Philip D. Rack, Ryan H. Allaire, Abhijeet Dhakane, P Ganesh, Lou Kondic, Linda Cummings, Miguel Fuentes-Cabrera |
On-Site Speaker (Planned) |
Reece C. Emery |
Abstract Scope |
Surface, interface, and temperature effects on phase separation and nanoparticle assembly of a 0.5Ni-0.5Ag bimetallic alloy were examined using classical Molecular Dynamics (MD). Bulk samples, droplets, and droplets deposited on a graphene substrate were investigated over a temperature range of 3000 K to 800 K, covering regions on the phase diagram of interest including the miscible liquid, immiscible liquid, liquid-crystal, and crystal-crystal regions. Phase separation temperature was found in agreement with the phase diagram by cooling the bulk sample over the given temperature range. With the introduction of free surfaces, phase separation was denoted by the formation of a core-shell nanostructure with surface effects driving Ag to form an outer-shell and Ni to the core. When deposited on a graphene substrate, phase separation was seen in conjunction with Ni layering on the substrate interface, and Ag driving to the free surface. |
Proceedings Inclusion? |
Undecided |