About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Rapid Synthesis of Zirconia-ceria Mixed Oxides by Flash Sintering |
Author(s) |
Rubens Ingraci, Darrin Byler, Kenneth McClellan, Erofili Kardoulaki |
On-Site Speaker (Planned) |
Rubens Ingraci |
Abstract Scope |
Zirconia-ceria mixed oxides were synthesized by solid-state reaction during flash sintering in a few minutes at low furnace temperatures. A comprehensive study of the effects of flash sintering parameters such as electric field and electric current intensities, furnace temperature, and furnace atmosphere was carried out to optimize the phase purity of the resulting mixed oxide and the microstructure of the dense pellet produced. Oxidizing atmospheres were demonstrated to improve final phase purity, while reducing atmospheres hinder the reaction. It was also verified that although high electric current densities favor the ZrO2-CeO2 reaction, it could also cause cracks and inhomogeneous microstructure along the dense pellet. Further characterization, such as differential scanning calorimetry and electrical conductivity, improved the understanding of the effects of flash sintering on the material’s microstructure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Phase Transformations, Other |