| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
The Role of Grain Boundaries in Nanoscale Sintering: An Atomistic Simulation Study |
| Author(s) |
Omar Hussein, Maher Alghalayini, Fadi Abdeljawad |
| On-Site Speaker (Planned) |
Fadi Abdeljawad |
| Abstract Scope |
Sintering is an integral processing step used to fabricate many nanostructured or nanograined materials. The ability to control densification and coarsening processes remains one of the most formidable challenges facing nanoscale sintering. Classical sintering treatments have several inherent assumptions, such as zero grain boundary (GB) energy and linearized chemical potential, that make it challenging to integrate GB anisotropy effects and defect-GB mediated processes. To probe such effects, molecular dynamics are leveraged in this study to examine the role of GB character in GB formation, particle neck growth, and densification rates during nanoscale sintering. GBs with various microstates are used to investigate the effect of GB metastable structures on sintering kinetics. In such studies, several key thermodynamic and kinetic properties and topological attributes are used to relate sintering rates to GB type. Our results provide future avenues to enrich existing mesoscale sintering models with interface-driven processes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Powder Materials, Nanotechnology |