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@ARTICLE{Batfalsky:50908,
author = {Batfalsky, P. and Haanappel, V. A. C. and Malzbender, J.
and Menzler, N. H. and Shemet, V. and Vinke, I. C. and
Steinbrech, R. W.},
title = {{C}hemical {I}nteraction between {G}lass-{C}eramic
{S}ealants and {I}nterconnect {S}teels in {SOFC} {S}tacks},
journal = {Journal of power sources},
volume = {155},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-50908},
pages = {128 - 137},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {In order to gain insight into the mechanism causing
performance degradation and/or failure, stacks of planar
solid oxide fuel cells (SOFC) are routinely dismantled and
examined after operation at Forschungszentrum Julich. The
post-operation inspection focuses in particular on the
chemical and mechanical compatibility aspects of cell and
stack materials.In the present work a short-term degradation
effect is addressed, which was found to be caused by
unwanted chemical interactions between glass-ceramic
sealants and ferritic steel interconnects. The
post-operation inspection revealed severe steel corrosion
along the seal rims. Under SOFC stack conditions rapidly
growing oxide nodules were observed bridging the 200 mu m
seal gal) between the metallic components after a few
hundred hours of operation. These oxide nodules, rich in
iron, gave rise to local short-circuiting effects eventually
resulting in stack failure.The present study, combined with
recent model investigations triggered by the stack results,
indicates that severe degradation only occurs in the case of
glass-ceramic sealants which contain minor amounts of PbO.
Furthermore, the rate of corrosion attack of the metallic
components strongly depends on the silicon (Si) content of
the ferritic steel. The stack tests suggest that increasing
the Si content increases the corrosion rate, and thus
detrimentally influences the stack performance. (c) 2005
Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {IWV-2 / IWV-1 / IWV-3 / ZAT},
ddc = {620},
cid = {I:(DE-Juel1)VDB2 / I:(DE-Juel1)VDB5 / I:(DE-Juel1)VDB3 /
I:(DE-Juel1)ZAT-20090406},
pnm = {Rationelle Energieumwandlung / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602)},
pid = {G:(DE-Juel1)FUEK402 / G:(DE-Juel1)SOFC-20140602},
shelfmark = {Electrochemistry / Energy $\&$ Fuels},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000237003000004},
doi = {10.1016/j.jpowsour.2005.05.046},
url = {https://juser.fz-juelich.de/record/50908},
}