| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Journal of the American Ceramic Society Awards Symposium
|
| Presentation Title |
Flash Sintering: A Paradigm Shift for Processing of Ceramics |
| Author(s) |
Tarini Prasad Mishra, Rishi Raj, Olivier Guillon, Martin Bram |
| On-Site Speaker (Planned) |
Tarini Prasad Mishra |
| Abstract Scope |
Flash-sintering is a promising approach for the ultra-rapid densification of ceramics at low furnace temperatures under an applied electric field and current. In the present work, the influence of the electrical parameters on the onset temperature, densification behavior, and microstructure of the flash sintered samples will be discussed on the example of Gadolinium doped-ceria (GDC). In particular, we focus on the development of a processing map that delineates the safe and failed regions for flash sintering over a wide range of applied current densities and electric fields for GDC. Hot spot and crack formation due to current localization are identified as two distinct failure modes in flash sintering. Furthermore, controlling the densification and tailoring of the microstructure for GDC by an innovative flash sintering mode known as the “Current-rate Flash sintering” was achieved. The electrical conductivity of the flash sintered and conventional sintered samples were found to be identical. |