TY  - JOUR
AU  - Cho, Jaehun
AU  - Li, Jin
AU  - Wang, Han
AU  - Li, Qiang
AU  - Fan, Zhe
AU  - Mukherjee, A. K.
AU  - Rheinheimer, W.
AU  - Wang, Haiyan
AU  - Zhang, X.
TI  - Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures
JO  - Materials Research Letters
VL  - 7
IS  - 5
SN  - 2166-3831
CY  - London [u.a.]
PB  - Taylor & Francis
M1  - FZJ-2020-04446
SP  - 194 - 202
PY  - 2019
AB  - Flash sintering has received wide attention lately due to its ultrafast densification process at low sintering temperature. However, the deformability of flash-sintered ceramics remains poorly understood. Yttria-stabilized zirconia (YSZ) was processed by flash sintering to study deformation mechanism. Transmission electron microscopy studies show that the flash-sintered YSZ contains ultrafine grains and dislocations. Strain rate jump tests at elevated temperature by in-situ microcompression indicate the existence of a large threshold stress. The activation energy of deformation is ∼145 kJ/mol, similar to the activation energy for oxygen vacancy migration. The deformation mechanisms of the flash-sintered YSZ at elevated temperatures are discussed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000463803200004
DO  - DOI:10.1080/21663831.2019.1575924
UR  - https://juser.fz-juelich.de/record/887820
ER  -