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@ARTICLE{Niewolak:824693,
author = {Niewolak, Leszek and Blum, Ludger and Peters, Roland and
Grüner, Daniel and Quadakkers, Willem J.},
title = {{B}ehavior of {M}etallic {C}omponents {D}uring 4000 h
{O}peration of an {SOFC} {S}tack with {C}arbon {C}ontaining
{F}uel {G}as},
journal = {Fuel cells},
volume = {16},
number = {5},
issn = {1615-6846},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2016-07251},
pages = {600-610},
year = {2016},
abstract = {In the present study the behavior of the ferritic
interconnect steel Crofer 22 APU and the nickel contacting
material during exposure in anode gas of a solid oxide fuel
cell (SOFC) stack was investigated. The stack had been
operating for 4,000 h and was ten times subjected to
thermal cycling within this time period. A temporary high
carbon activity in the fuel gas combined with temperature
changes resulted in local disintegration of the nickel mesh.
Additionally, nickel diffusion from the nickel mesh into the
steel resulted in the formation of an austenitic zone.
Diffusion of steel constituents into the nickel mesh lead to
the formation of Cr,Mn-oxides in the latter. Presence of the
nickel/steel contact allows transport of carbon from the gas
into the steel, resulting in local internal carburization of
the steel. In areas which were not in direct contact with
the nickel mesh, the Crofer 22 APU interconnect formed a
protective surface oxide scale and no indications for carbon
uptake were found. Mechanisms for the experimentally
observed effects, including the local disintegration of the
nickel mesh, are presented.},
cin = {IEK-2 / IEK-3},
ddc = {620},
cid = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)IEK-3-20101013},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000386149300011},
doi = {10.1002/fuce.201600085},
url = {https://juser.fz-juelich.de/record/824693},
}