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@ARTICLE{Mishra:878011,
author = {Mishra, Tarini Prasad and Laptev, Alexander and Ziegner,
Mirko and Sistla, Sree Koundinya and Kaletsch, Anke and
Broeckmann, Christoph and Guillon, Olivier and Bram, Martin},
title = {{F}ield-{A}ssisted {S}intering/{S}park {P}lasma {S}intering
of {G}adolinium-{D}oped {C}eria with {C}ontrolled
{R}e-{O}xidation for {C}rack {P}revention},
journal = {Materials},
volume = {13},
number = {14},
issn = {1996-1944},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2020-02580},
pages = {3184 -},
year = {2020},
note = {Open Access Journal},
abstract = {Gadolinium-Doped Ceria (GDC) is a prospective material for
application in electrochemical devices. Free sintering in
air of GDC powder usually requires temperatures in the range
of 1400 to 1600 °C and dwell time of several hours.
Recently, it was demonstrated that sintering temperature can
be significantly decreased, when sintering was performed in
reducing atmosphere. Following re-oxidation at elevated
temperatures was found to be a helpful measure to avoid
sample failure. Sintering temperature and dwell time can be
also decreased by use of Spark Plasma Sintering, also known
as Field-Assisted Sintering Technique (FAST/SPS). In the
present work, we combined for the first time the advantages
of FAST/SPS technology and re-oxidation for sintering of GDC
parts. However, GDC samples sintered by FAST/SPS were highly
sensitive to fragmentation. Therefore, we investigated the
factors responsible for this effect. Based on understanding
of these factors, a special tool was designed enabling
pressureless FAST/SPS sintering in controlled atmosphere.
For proof of concept, a commercial GDC powder was sintered
in this tool in reducing atmosphere $(Ar-2.9\%H2),$ followed
by re-oxidation. The fragmentation of GDC samples was
avoided and the number of micro-cracks was reduced to a
minimum. Prospects of GDC sintering by FAST/SPS were
discussed.},
cin = {IEK-1 / JARA-ENERGY / IEK-2},
ddc = {600},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$ /
I:(DE-Juel1)IEK-2-20101013},
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},
pubmed = {pmid:32708746},
UT = {WOS:000554233400001},
doi = {10.3390/ma13143184},
url = {https://juser.fz-juelich.de/record/878011},
}