On the Arrhenius-like behavior of conductivity during flash sintering of 3 mol% yttria stabilized zirconia ceramics
Journal Article
·
· Scripta Materialia
- Univ. of Sao Paulo (Brazil); Univ. of Colorado, Boulder, CO (United States)
- Univ. of Colorado, Boulder, CO (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Sao Paulo (Brazil)
- Univ. of Colorado, Boulder, CO (United States); Univ. Federal de Sao Carlos (UFSCAR) (Brazil)
Here, we discuss the Arrhenius behavior of electrical conductivity σ during flash sintering of 3 mol% yttria stabilized zirconia (3YSZ). In situ x-ray diffraction is used to determine sample temperature. Sintering contribution to σ is excluded by investigating the flash event on a dense ceramic. We show that total conductivity follows an Arrhenius-like equation in both dense and green samples, even during Stage II of flash. The non-linearity often verified during flash sintering of 3YSZ is therefore related to the furnace temperature instead of the sample temperature when building the ln(σ) vs. 1/T plots. Furthermore, we verified a change in the activation energy for conduction prior to the ignition of the flash event and discussed the possible mechanisms. For instance, the decrease in activation energy from Stage I to II in the dense sample is attributed to a contribution from electronic carriers.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- National Council for Scientific and Technological Development (CNPq); Sao Paulo Research Foundation (FAPESP); US Army Research Office (ARO); US Department of the Navy, Office of Naval Research (ONR); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1817201
- Alternate ID(s):
- OSTI ID: 1804581
OSTI ID: 23199644
- Report Number(s):
- BNL--222041-2021-JAAM
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Vol. 203; ISSN 1359-6462
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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