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@ARTICLE{Niewolak:279596,
author = {Niewolak, Leszek and Savenko, Aleksei and Grüner, Daniel
and Hattendorf, H. and Breuer, Uwe and Quadakkers, Willem
J.},
title = {{T}emperature {D}ependence of {L}aves {P}hase {C}omposition
in {N}b, {W} and {S}i-{A}lloyed {H}igh {C}hromium {F}erritic
{S}teels for {SOFC} {I}nterconnect {A}pplications},
journal = {Journal of phase equilibria and diffusion},
volume = {36},
number = {5},
issn = {1547-7037},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2015-07480},
pages = {471-484},
year = {2015},
abstract = {The Laves phase strengthened ferritic steel Crofer 22 H has
been proposed as construction material for interconnects in
solid oxide fuel cells. The background of the present study
relates to the further qualification of this steel,
especially with respect to a possible optimization of amount
and composition of the strengthening Laves phase
precipitates. For this purpose the chemical composition of
the Laves phase in a number of high purity model alloys as
well as in Crofer 22 H equilibrated at temperatures between
700 and 1100 °C was measured by EDX/WDX and atom probe
tomography (APT). The obtained chemical compositions were
used for a qualitative estimation of the site occupancy for
Fe, Cr, Nb, W and Si in the Laves phase unit cell.
Additionally, the results from APT measurements indicate the
important role of impurities such as e.g. titanium in the
Laves phase formation. Finally, the experimental results
were compared with Thermocalc calculations using the
database TCFE 7. This revealed that within the temperature
range 800-900 °C a qualitative description of phases is
possible, however, substantial differences existed
particularly for the steel Crofer 22 H at and below 700 °C
and above 950 °C.},
cin = {IEK-2 / ZEA-3},
ddc = {540},
cid = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)ZEA-3-20090406},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000362910800006},
doi = {10.1007/s11669-015-0403-5},
url = {https://juser.fz-juelich.de/record/279596},
}