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@ARTICLE{Young:12260,
author = {Young, D.J. and Naumenko, D. and Niewolak, L. and Wessel,
E. and Singheiser, L. and Quadakkers, W. J.},
title = {{O}xidation {K}inetics of {Y}-doped {F}e{C}r{A}l-{A}lloys
in {L}ow and {H}igh p{O}2 {G}ases},
journal = {Materials and corrosion},
volume = {61},
issn = {0947-5117},
address = {Weinheim [u.a.]},
publisher = {Wiley-VCH},
reportid = {PreJuSER-12260},
pages = {838 -844},
year = {2010},
note = {The authors are grateful to Mr. H. Cosler at the
Forschungszentrum Julich for thermogravimetry measurements
and two-stage oxidation experiments. Part of the work was
performed under the funding of the European Commission
(Project acronym SMILER, G5RD-CT-2001-0530) and Deutsche
Forschungsgemeinshaft (Project No. NA-615-2).},
abstract = {A model Fe-20Cr-5Al-0.05Y alloy was oxidized in
$Ar-20\%O-2$ and $Ar-4\%H-2-7\%H2O$ at 1200-1300 degrees C.
Two-stage oxidation experiments using oxygen isotope tracers
showed that inward oxygen diffusion was predominant in both
gases, but more isotope exchange was observed in the H-2/H2O
gas reaction. The alumina scales formed in both gases were
composed of columnar grains, the lateral size of which
increased linearly with depth beneath the scale surface.
Thermogravimetric measurement of oxygen uptake revealed
kinetics which were intermediate to parabolic and cubic
kinetic rate laws. A model based on grain boundary diffusion
control coupled with competitive oxide grain growth accounts
satisfactorily for the results when the requirement for a
divergence-free flux within the scale is imposed. This
treatment shows that the oxide grain boundary diffusion
coefficient is lower when H2O is the oxidant. It is
concluded that hydrogen slows the grain boundary diffusion
process by altering the nature of the diffusing species.},
keywords = {J (WoSType)},
cin = {IEK-2 / JARA-ENERGY},
ddc = {670},
cid = {I:(DE-Juel1)IEK-2-20101013 / $I:(DE-82)080011_20140620$},
pnm = {Rationelle Energieumwandlung},
pid = {G:(DE-Juel1)FUEK402},
shelfmark = {Materials Science, Multidisciplinary / Metallurgy $\&$
Metallurgical Engineering},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000283636300002},
doi = {10.1002/maco.200905432},
url = {https://juser.fz-juelich.de/record/12260},
}