This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/22534 in citations.
Please use the identifier: http://dx.doi.org/10.3390/ceramics2030036 in citations.
Towards In-Situ Electron Microscopy Studies of Flash Sintering
Towards In-Situ Electron Microscopy Studies of Flash Sintering
Flash sintering, a special case of electric field-assisted sintering, results in accelerated densification at lower temperatures than conventional sintering methods. However, the mechanisms remain elusive despite the wide application potential. In-situ electron microscopy studies reveal shrinkage of...
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Personal Name(s): | Schwarzbach, Danny |
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Gonzalez, Jesus / Guillon, Olivier / Roddatis, Vladimir / Volkert, Cynthia A. (Corresponding author) | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | Ceramics, 2 (2019) 3, S. 472-487 |
Imprint: |
Melbourne
Informit
2019
|
DOI: |
10.3390/ceramics2030036 |
Document Type: |
Journal Article |
Research Program: |
ohne Topic |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.3390/ceramics2030036 in citations.
Flash sintering, a special case of electric field-assisted sintering, results in accelerated densification at lower temperatures than conventional sintering methods. However, the mechanisms remain elusive despite the wide application potential. In-situ electron microscopy studies reveal shrinkage of ZnO green bodies due to both heating and heating/biasing but show no obvious effect of the current on the behavior. In contrast, thin epitaxial ZnO films deposited on an Al2O3 substrate undergo a clear flash event during in-situ voltage application in the TEM, providing the first observation of flash sintering of a thin film. The specimen was captured in the high conductivity state where grain boundary motion was observed. The microscopic origins of the high conductivity state could not be detected, but may have the same underlying physical origin as the high conductivity memristive state. |