%0 Journal Article
%A Cho, Jaehun
%A Li, Jin
%A Wang, Han
%A Li, Qiang
%A Fan, Zhe
%A Mukherjee, A. K.
%A Rheinheimer, W.
%A Wang, Haiyan
%A Zhang, X.
%T Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures
%J Materials Research Letters
%V 7
%N 5
%@ 2166-3831
%C London [u.a.]
%I Taylor & Francis
%M FZJ-2020-04446
%P 194 - 202
%D 2019
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000463803200004
%R 10.1080/21663831.2019.1575924
%U https://juser.fz-juelich.de/record/887820