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Electric Field Assisted Sintering of Cubic Zirconia at 390°C
Author(s) -
Downs John A.,
Sglavo Vincenzo M.
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12281
Subject(s) - sintering , electric field , materials science , flash (photography) , dissipation , cubic zirconia , yttria stabilized zirconia , field (mathematics) , composite material , condensed matter physics , ceramic , thermodynamics , optics , physics , mathematics , quantum mechanics , pure mathematics
Using the flash sintering technique, cubic yttria‐stabilized zirconia is shown to sinter at 390°C, more than 1000°C below nominal sintering temperatures, by using a DC electric field of 2250 V/cm. Furthermore, flash sintering experiments performed with electric fields between 60 and 2250 V/cm were used to show that the relationship of the temperature at the onset of flash sintering ( T Onset ) and the applied field (E) follows the power relationship T Onset ( K ) = 2440 E −1/5.85 (V/cm). Using this relationship, and considering the sintering of the sample in the absence of an electric field, the critical electric field to enter the flash sintering regime is shown to be 24.5 V/cm. For electric fields between this critical electric field and 2250 V/cm, the onset of flash sintering occurs in the same range of critical volumetric power dissipation, between 1 and 10 mW/mm 3 , suggesting this is a material property. Despite the volumetric power dissipation being the critical value for the onset of flash sintering behavior, the current density achieved during sintering appears to be more critical for densification rather than maximizing power dissipation.