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@ARTICLE{Guillon:894443,
author = {Guillon, Olivier and De Souza, Roger A. and Mishra, Tarini
Prasad and Rheinheimer, Wolfgang},
title = {{E}lectric-field-assisted processing of ceramics:
{N}onthermal effects and related mechanisms},
journal = {MRS bulletin},
volume = {46},
number = {1},
issn = {0883-7694},
address = {Cambridge},
publisher = {Cambridge Univ. Press},
reportid = {FZJ-2021-03225},
pages = {52 - 58},
year = {2021},
abstract = {Field-assisted processing methods, such as spark plasma
sintering and flash sintering, have considerably expanded
the toolbox of ceramic engineering. Depending on the
conditions, substantial electric currents may flow through
the material resulting in fast heating rates due to Joule
heating. Here, we focus on nonthermal effects induced by
electric fields during processing of fluorite- and
perovskite-based ceramics. The fundamentals of how a field
can directly modify defect formation and migration in
crystals are discussed. In addition, the interplay of ion
transport and electrical conductivity is considered, this
interplay being crucial to understanding nonthermal effects
caused by electric fields (as in memristive switching).
Electrochemical reactions leading to new phases or reduction
are also described, as are densification rates and sintering
parameters that are significantly affected even though the
sample temperature is held constant. Finally, as
grain-boundary properties and segregation are changed by ion
transport, we describe how both retardation and acceleration
of grain growth can be achieved including graded
microstructures.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {1221 - Fundamentals and Materials (POF4-122) / 1231 -
Electrochemistry for Hydrogen (POF4-123) / 1232 -
Power-based Fuels and Chemicals (POF4-123) / DFG project
319339707 - Diffusionsgesteuerte Prozesse in
polykristallinem Ceroxid: Kombinierte Wirkung von
elektrischem Feld und mechanischer Belastung},
pid = {G:(DE-HGF)POF4-1221 / G:(DE-HGF)POF4-1231 /
G:(DE-HGF)POF4-1232 / G:(GEPRIS)319339707},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000614550900009},
doi = {10.1557/s43577-020-00008-w},
url = {https://juser.fz-juelich.de/record/894443},
}