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@ARTICLE{Nickel:57784,
author = {Nickel, H. and Quadakkers, W. J. and Singheiser, L.},
title = {{D}etermination of {C}orrosion {L}ayers and {P}rotective
{C}oatings on {S}teels and {A}lloys used in {S}imulated
{S}ervice {E}nvironment of {M}odern {P}ower {P}lants},
journal = {Journal of pressure vessel technology},
volume = {128},
issn = {0094-9930},
address = {New York, NY},
publisher = {ASME},
reportid = {PreJuSER-57784},
pages = {130 - 139},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {The development of modern power generation systems with
higher thermal efficiency requires the use of constructional
materials of higher strength and improved resistance to the
aggressive service atmospheres. In this paper, the following
examples are discussed. (i) The oxidation behavior of $9\%$
Cr steels in simulated combustion gases: The effects of O-2
and H2O content on the oxidation behavior of $9\%$ Cr steels
in the temperature range 600-800 degrees C showed that in
dry oxygen a protective scale was formed with an oxidation
rate controlled by diffusion. In contrast, that in the
presence of water vapor, after an incubation period, the
scale became nonprotective as a result of a change in the
oxidation mechanism. (ii) The development of NiCrAlY alloys
for corrosion-resistant coatings and thermal barrier
coatings of gas turbine components: The increase of
component surface temperature in modern gas turbines leads
to an enhanced oxidation attack of the blade coating.
Considerable efforts have been made in the improvement of
the temperature properties of MCrAlY coatings by the
additions of minor elements, such as yttrium, silicon, and
titanium. The experimental results show the positive, but
different influence of the oxidation behavior of the MCrAlY
coatings by the addition of these minor elements. (iii) The
development of lightweight intermetallics of TiAl-basis:
TiAl-based intermetallics are promising materials,for future
turbine components because of the combination of
high-temperature strength and low density. These alloys,
however possess poor oxidation resistance at temperatures
above 700 degrees C. The experimental results showed that
the oxidation behavior of TiAl-based intermetallics can be
strongly improved by minor additions of 1-2 at. $\%$ silver.
(iv) The oxide-dispersion-strengthened (ODS) alloys provide
excellent creep resistance up to much higher temperatures
than can be achieved with conventional wrought or cast
alloys in combination with suitable high-temperature
oxidation/corrosion resistance. The growth mechanisms of
protective chromia and alumina scales were examined by a
two-stage oxidation method with O-18 tracer The distribution
of the oxygen isotopes in the oxide scale was determined by
secondary ion-mass spectroscopy and SNMS. The results show
the positive influence of a Y2O3 dispersion on the oxidation
resistance of the ODS alloys and its effect on growth
mechanisms.},
keywords = {J (WoSType)},
cin = {IWV-2 / JARA-ENERGY},
ddc = {620},
cid = {I:(DE-Juel1)VDB2 / $I:(DE-82)080011_20140620$},
pnm = {Rationelle Energieumwandlung},
pid = {G:(DE-Juel1)FUEK402},
shelfmark = {Engineering, Mechanical},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000235862400020},
doi = {10.1115/1.2137769},
url = {https://juser.fz-juelich.de/record/57784},
}