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@ARTICLE{Vassen:283681,
author = {Vassen, Robert and Grünwald, N. and Marcano, D. and
Menzler, N. H. and Mücke, R. and Sebold, D. and Sohn, Y. J.
and Guillon, Olivier},
title = {{A}ging of atmospherically plasma sprayed chromium
evaporation barriers},
journal = {Surface and coatings technology},
volume = {291},
issn = {0257-8972},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-01978},
pages = {115 - 122},
year = {2016},
abstract = {Chromium evaporation barriers are frequently used in solid
oxide fuel cells to protect the porous cathode from chromium
poisoning. Volatile chromium species are generated at the
operation temperature of about 600–900 °C in a humid
atmosphere for chromia scale forming steels as interconnect
materials. In order to reduce this effect, barrier coatings
are applied, often by atmospheric plasma spraying. However,
also in these coatings microstructural changes as
densification and in parallel formation of large pores have
been observed. In order to clarify these mechanisms plasma
sprayed Mn1.0 Co1.9Fe0.1O4 (“MCF”) are deposited on
ferritic steels and furthermore coated with a perovskite
based contact layer as used in stack build-up. These
coatings are annealed in air up to 1000 h and the
microstructural changes and bending of the samples are
studied. The results show increasing bending with increasing
aging time. High temperature curvature measurements indicate
that the amount of bending is not significantly dependent on
temperature. As an explanation the creep deformation of the
substrate/coating system at high temperatures due to
compressive stress levels in the coating is given. The
origin of the stress is related to phase changes in
combination with the oxidation of the coatings. In addition,
interdiffusion and densification processes are discussed.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {620},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
Training in Energy and Climate Research (HITEC)
(HITEC-20170406)},
pid = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000389687600014},
doi = {10.1016/j.surfcoat.2016.02.005},
url = {https://juser.fz-juelich.de/record/283681},
}