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@ARTICLE{Zurek:865888,
author = {Zurek, Joanna and Margaritis, Nikolaos and Naumenko, Dmitry
and Menzler, Norbert H. and Quadakkers, Willem J.},
title = {{B}ehaviour of {M}etallic {M}aterials in {S}imulated
{S}ervice {E}nvironments of {CO}2/{H}2{O}
{C}o‑electrolysis {S}ystemsfor {P}ower‑to‑{X}
{A}pplication},
journal = {Oxidation of metals},
volume = {92},
number = {3-4},
issn = {0030-770X},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {FZJ-2019-05167},
pages = {353-377},
year = {2019},
abstract = {In the present study, the ferritic steel Crofer 22 H as
potentially suitable interconnect material for SOEC stacks
as well as joints between the steel and Ni- and CuNi contact
materials was investigated with respect to the behaviour in
simulated service environments of an SOEC system for CO2/H2O
co-electrolysis. Exposures up to 1000 h at temperatures
between 600 and 800 °C were carried out in CO2/H2O- and
CO/H2-rich gases, thus simulating conditions at the stack
inlet and outlet, respectively. It was found that the steel
formed protective surface oxide scales consisting of chromia
and/or Cr/Mn spinel in all studied test conditions. No
indication of carbon transfer from the gas atmosphere into
the steel was found even in the high carbon activity
CO/H2-rich gas simulating stack outlet conditions. However,
in the latter gas substantial carbon transfer from the gas
to the steel via the Ni- or CuNi-wires resulted in the
formation of a carburized zone with substantial M23C6 and/or
M7C3 precipitate formation. This effect was more pronounced
for the joints of the steel with the Ni-wire than with the
CuNi-wire. In the gas simulating the service environment at
the stack inlet, only minor carbon transfer was found in
case of the Ni/steel joint at 600 °C but not at 800 °C. In
case of the CuNi-wires, partial loss of contact between wire
and interconnect steel and formation of Kirkendall voids as
a consequence of interdiffusion between wire and steel were
observed. The experimental results are discussed using
thermodynamic considerations involving gas equilibria and
stability of possible external and/or internal formation of
oxide and carbide phases.},
cin = {IEK-2 / ZEA-1 / IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)ZEA-1-20090406 /
I:(DE-Juel1)IEK-1-20101013},
pnm = {134 - Electrolysis and Hydrogen (POF3-134) / P2X -
Power-To-X (POWER-2-X-2016)},
pid = {G:(DE-HGF)POF3-134 / G:(DE-Juel1)POWER-2-X-2016},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000487923500012},
doi = {10.1007/s11085-019-09927-9},
url = {https://juser.fz-juelich.de/record/865888},
}