| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances and Discoveries in Non-equilibrium Driven Nanomaterials and Thin Films
|
| Presentation Title |
Metastable Silicon Nanocomposites via Plasma Synthesis and Spark Plasma Sintering |
| Author(s) |
Steven Herzberg, Devin Coleman, Christian Roach, Sabah Bux, Suveen Mathaudhu, Lorenzo Mangolini |
| On-Site Speaker (Planned) |
Steven Herzberg |
| Abstract Scope |
Pervasively metastable materials have been shown to have enhanced and unique properties over their traditional equilibrium phases. These enhancements have largely been demonstrated in thin films, however “bulk” processing methods have yet to be sufficiently explored. This project explores a unique approach for creating pervasively metastable, bulk nanocomposite materials via low pressure, non-thermal plasma synthesis of non-equilibrium nanoparticles and the subsequent consolidation by spark plasma sintering (SPS). By using silane and methane precursors, plasma synthesis is used to create amorphous, non-stoichiometric silicon carbide nanopowders. SPS consolidates and crystallizes the nanopowder into a bulk silicon-silicon carbide nanocomposite. The silicon carbide remains dispersed within the silicon matrix, allowing for the formation of metastable nanostructures with unique functional properties that cannot be created through conventional powder processing techniques. The effects of these nanostructures on the thermoelectric properties of the silicon-silicon carbide system are explored. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |