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@ARTICLE{Fang:887812,
author = {Fang, Xufei and Ding, Kuan and Janocha, Stephan and
Minnert, Christian and Rheinheimer, Wolfgang and Frömling,
Till and Durst, Karsten and Nakamura, Atsutomo and Rödel,
Jürgen},
title = {{N}anoscale to microscale reversal in room-temperature
plasticity in {S}r{T}i{O}3 by tuning defect concentration},
journal = {Scripta materialia},
volume = {188},
issn = {1359-6462},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2020-04438},
pages = {228 - 232},
year = {2020},
abstract = {Incipient room-temperature plastic deformation in
single-crystal SrTiO3 at the nanoscale and the microscale is
contrasted by applying a scale-dependent indentation
technique. Using nanoindentation pop-in, nanoindentation
creep, and an evaluation of dislocation spacing via etch pit
study, we demonstrate a reversal of yield stress for
crystals with different vacancy concentrations and
pre-existing dislocation densities. A competing mechanism
between dislocation nucleation and dislocation motion on
crystal plasticity at different length scales is
highlighted. This finding enables us to complete the
understanding of dislocation-mediated plasticity for ceramic
oxides at the nanoscale as compared to the microscale and
macroscale.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000558747100044},
doi = {10.1016/j.scriptamat.2020.07.033},
url = {https://juser.fz-juelich.de/record/887812},
}