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Flash sintering of alumina/reduced graphene oxide composites.
- Source :
-
Ceramics International . Oct2021, Vol. 47 Issue 19, p27267-27273. 7p. - Publication Year :
- 2021
-
Abstract
- The flash sintering behavior of Al 2 O 3 /reduced graphene oxide (rGO) composites was investigated. rGO was used as a composite component and a conductive additive. Under the electric fields of 250–400 V cm−1, the flash event occurred at extremely low temperatures of 236–249 °C. The current density limit played a significant role in the degree of densification. A larger current density resulted in a higher density of the sample. However, current densities larger than 33.33 A cm−2 resulted in broken samples because of the localization of high current density coupled with the formation of hot spots. Flash sintering at a furnace temperature of 800 °C, electric field of 300 V cm−1 and current density limit of 33.33 A cm−2 produced nearly completely dense Al 2 O 3 /rGO composites. In addition to the current limit, the furnace temperature is also a key parameter that controls the degree of densification to achieve "safe" flash sintering. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SINTERING
*ELECTRIC fields
*LOW temperatures
*FURNACES
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 47
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 152063582
- Full Text :
- https://doi.org/10.1016/j.ceramint.2021.06.148