| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials for Energy Applications
|
| Presentation Title |
Electric Current Effects in Spark Plasma Sintering: Heating Pathway Analysis |
| Author(s) |
Eugene A. Olevsky, Geuntak Lee, Charles Maniere, Elisa Torresani |
| On-Site Speaker (Planned) |
Eugene A. Olevsky |
| Abstract Scope |
High rate field-assisted processing involves transient thermal and non-thermal phenomena, which, if properly managed, provide unique environment for densification and microstructure retention. Thereby, an efficient field-assisted sintering process utilizes conditions of controlled non-equilibrium. For practical realization of this concept the in-depth analysis of the role of electrical current pathways in mass transport during field-assisted sintering is necessary. The impact of the electric current on sintering is revealed by introducing the three heating modes during spark plasma sintering enabling the different electric current density under the same temperature. The experimental evidence of the electric current effect on sintering is demonstrated by the determination of the electric current related constitutive parameters obtained from the three heating modes. The enhancement of the dislocation motion and the reduction of the flow stress under the electric current passage are experimentally proven by the mechanical strength tests and using the X-ray diffraction results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Process Technology, Powder Materials, Other |