TY  - JOUR
AU  - Schwarzbach, Danny
AU  - Gonzalez, Jesus
AU  - Guillon, Olivier
AU  - Roddatis, Vladimir
AU  - Volkert, Cynthia A.
TI  - Towards In-Situ Electron Microscopy Studies of Flash Sintering
JO  - Ceramics
VL  - 2
IS  - 3
SN  - 1035-1841
CY  - Melbourne
PB  - Informit
M1  - FZJ-2019-03999
SP  - 472-487
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000706488600001
DO  - DOI:10.3390/ceramics2030036
UR  - https://juser.fz-juelich.de/record/864096
ER  -