About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XVII
|
Presentation Title |
Molecular Dynamics Simulations of Iron-based Metallic Glasses during Spark Plasma Sintering |
Author(s) |
Jordan Campbell, Carlos Ruestes, Tod Pascal, Olivia A. Graeve |
On-Site Speaker (Planned) |
Jordan Campbell |
Abstract Scope |
Bulk metallic glasses are metastable solids that can be manufactured using a variety of techniques, including the spark plasma sintering (SPS) process. This processing technique allows the rapid sintering of a variety of materials and can be used to obtain nanometer grain sizes and metastable phases. In situ analysis of metallic glasses to understand how the atoms diffuse is not possible due to the nature of SPS. Thus, we have studied the process of sintering of these materials using a classical molecular dynamics methodology to elucidate self and mutual diffusion coefficients based on combined Embedded Atom Method (EAM) and Morse potentials. However, as classical molecular dynamics does not explicitly handle electron dynamics, a charge equilibration technique has been used to account for the effect of high current densities (~103 A/cm2 ) inherent in SPS. Specific results on iron-based metallic glasses will be presented and discussed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |