Artículo
On the athermal origin of flash sintering: Separating field-induced effects from Joule heating using a current ramp approach
Autor/es | Molina Molina, Sandra
Perejón Pazo, Antonio ![]() ![]() ![]() ![]() ![]() ![]() ![]() Pérez Maqueda, Luis A. Sánchez Jiménez, Pedro Enrique |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2024-03-16 |
Fecha de depósito | 2024-05-29 |
Publicado en |
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Resumen | Joule heating is generally acknowledged as the main driving force behind Flash Sintering. However, this view is
challenged by the presence of athermal phenomena and the similarities between the flash process and ... Joule heating is generally acknowledged as the main driving force behind Flash Sintering. However, this view is challenged by the presence of athermal phenomena and the similarities between the flash process and dielectric breakdown. This work offers new insights into flash as an electrical runaway. Using current ramps to perform flash experiments on zinc oxide, two distinct stages within the process were revealed by electrical, thermal and microstructural measurements: a field-dominated regime where the flash event is triggered and a subsequent current-dominated regime associated with power dissipation. The contribution of each regime to the whole flash process was found to be determined by the initial resistivity of the sample. Furthermore, impedance spectroscopy data confirmed field-induced enhancement of conductivity at the flash-onset without significant Joule heating. |
Agencias financiadoras | Junta de Andalucía European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) |
Identificador del proyecto | P18-FR-1087
![]() 201960E092 ![]() 202060I004 ![]() |
Cita | Molina Molina, S., Perejón Pazo, A., Pérez Maqueda, L.A. y Sánchez Jiménez, P.E. (2024). On the athermal origin of flash sintering: Separating field-induced effects from Joule heating using a current ramp approach. Scripta Materialia, 247, 116086. https://doi.org/10.1016/j.scriptamat.2024.116086. |
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