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@ARTICLE{Mishra:878010,
author = {Mishra, Tarini Prasad and Neto, Rubens Roberto Ingraci and
Raj, Rishi and Guillon, Olivier and Bram, Martin},
title = {{C}urrent-rate flash sintering of gadolinium doped ceria:
{M}icrostructure and {D}efect generation},
journal = {Acta materialia},
volume = {189},
issn = {1359-6454},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2020-02579},
pages = {145 - 153},
year = {2020},
abstract = {In current-rate flash-sintering experiments the current is
injected into the specimen from the very start and then
increased at a constant rate, while the furnace is held at a
constant temperature. The power supply remains under current
control. The flash is induced at low current densities which
reduces local heating at the electrodes. It leads to a
uniform grain size across the entire gage length of the
dog-bone specimen. This work pertains to 10 $mol.\%$
gadolinium-doped ceria flash sintered at current-rates
ranging from 50 mA min−1 to 1000 mA min−1 at a furnace
temperature of 680 °C. Full densities are obtained at a
current density limit of 200 mA mm–2. Densification is
shown to depend only on the instantaneous value of the
current density, and not on the current-rate. The grain
size, however, is shown to become finer at higher
current-rates. A preliminary analysis of the “energy
deficit”, that is, the estimated power input corresponding
to the temperature as measured with a pyrometer, and the
actual power consumption, estimates that huge concentrations
of Frenkel defects may be introduced in the flash process.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {899 - ohne Topic (POF3-899) / DFG project 274005202 - SPP
1959: Manipulation of matter controlled by electric and
magnetic fields: Towards novel synthesis and processing
routes of inorganic materials (274005202)},
pid = {G:(DE-HGF)POF3-899 / G:(GEPRIS)274005202},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000527829900013},
doi = {10.1016/j.actamat.2020.02.036},
url = {https://juser.fz-juelich.de/record/878010},
}