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@ARTICLE{Back:874008,
author = {Back, Hyoung Chul and Gibmeier, Jens and Vaßen, Robert},
title = {{P}hase {T}ransformation-{I}nduced {C}hanges in
{M}icrostructure and {R}esidual {S}tresses in {T}hermally
{S}prayed {M}n{C}o{F}e{O}4 {P}rotective {C}oatings},
journal = {Journal of thermal spray technology},
volume = {29},
issn = {1544-1016},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2020-01168},
pages = {1242–1255},
year = {2020},
abstract = {The contribution comprises the investigation of the
microstructure and residual stresses in thermally sprayed
Mn1.0Co1.9Fe0.1O4.0 (MCF) protective coatings for
interconnectors of SOFC stacks, deposited on ferritic steel
Crofer 22 APU via atmospheric plasma spraying (APS). The
coatings are designated to prevent Cr evaporation during
high operation temperature of the SOFCs. The local
microstructure, pore distributions and pore shapes, phase
fractions, micro-hardness, Youngs’ modulus and residual
stresses through the coating thickness were characterized in
as-sprayed state and compared with longtime (10-100 h)
heat-treated samples (700 and 850 °C). The results show
that the long-term thermal aging treatment causes a
successive high sintering of the coatings characterized by a
reduction in pore density, by phase transformation from the
metastable rock salt structure that gradually transformed to
a spinel structure and by a slight relaxation of the
process-induced tensile residual stresses in the coating.
For SOFC application of the MCF coating, this indicates an
improvement in the coatings integrity. During operation, a
self-repair proceeds leading to dense and gas-proof
coatings, while the mechanical properties are mainly
retained.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000516352400001},
doi = {10.1007/s11666-020-00997-9},
url = {https://juser.fz-juelich.de/record/874008},
}