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@PHDTHESIS{Nowak:173039,
author = {Nowak, Wojciech},
title = {{H}igh {T}emperature {C}orrosion of {A}lloys and {C}oatings
in {G}as-{T}urbines {F}ired {W}ith {H}ydrogen-{R}ich
{S}yngas {F}uels},
volume = {239},
school = {RWTH Aachen},
type = {Dr.},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2014-06452},
isbn = {978-3-95806-012-8},
series = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
Umwelt / Energy $\&$ Environment},
pages = {201 S.},
year = {2014},
note = {RWTH Aachen, Diss., 2014},
abstract = {One of the possible ways to reduce the CO$_{2}$ emissions
from coal fired power plants is to use a H$_{2}$-rich syngas
in the gas turbine as a fuel which is realized in the
Integrated Gasification Combined Cycle (IGCC). However,
burning syngas results in higher amount of water vapourin
the turbine environment compared to the turbines operating
on e.g. natural gas. In the present studies the effect of
water vapour on the oxidation behaviour of three
materialgroups used in stationary gas turbines was
investigated, including: 1. A polycrystalline Ni-base
superalloy Rene 80, which is representative of a chromia
forming alloys; 2. An alumina forming, Re-containing MCrAlY
coating, and 3. APS-TBC systems based on Rene 80 and having
the same MCrAlY as the bondcoat. The three materials types
were tested mainly at 1050°C, however, some experiments
were also performed at higher temperatures: 1080°C and
1120°C in various atmospheres including those based on
Ar-O$_{2}$ and synthetic air with various water vapour
contents. The results obtained for Rene 80 in Ar-O$_{2}$
based atmospheres showed that water vapour addition had only
a minor effect on the scale composition and growth rate.
However, in the synthetic air based atmospheres water vapour
addition suppressed internal Ti nitridation. After longer
exposure times (over 1000 h at 1050°C) higher material loss
was observed in the H2$_{O}$-containing synthetic air, which
might be related to evaporation of Cr, Mo, W oxyhydroxide
species. [...]},
keywords = {Dissertation (GND)},
cin = {IEK-2},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {122 - Power Plants (POF2-122)},
pid = {G:(DE-HGF)POF2-122},
typ = {PUB:(DE-HGF)11},
url = {https://juser.fz-juelich.de/record/173039},
}