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@ARTICLE{Vaen:884045,
author = {Vaßen, Robert and Mack, Daniel Emil and Tandler, Martin
and Sohn, Yoo Jung and Sebold, Doris and Guillon, Olivier},
title = {{U}nique performance of thermal barrier coatings made of
yttria stabilized zirconia at extreme temperatures $(\>$
1500°{C})},
journal = {Journal of the American Ceramic Society},
volume = {104},
number = {1},
issn = {1551-2916},
address = {Westerville, Ohio},
publisher = {Soc.},
reportid = {FZJ-2020-03065},
pages = {463-471},
year = {2021},
abstract = {Yttria stabilized zirconia (YSZ) has been for several
decades the state of the art material for thermal barrier
coating (TBC) applications in gas turbines. Although the
material has unique properties, further efficiency
improvement by increasing the temperature is limited due to
its maximum temperature capability of about 1200°C. Above
this temperature the deposited metastable tetragonal (t´)
phase undergoes a detrimental phase transformation as well
as enhanced sintering. Both processes promote the failure of
the coatings at elevated temperatures and this early failure
has been frequently observed in gradient tests. In this
paper we now experimentally shown for the first time that
under typical cycling conditions not the time at elevated
temperatures leads to the reduced lifetime but the transient
cooling rates. If cooling rates were reduced to 10K/s, TBC
systems could be operated in a burner rig at a surface
temperature well above 1500°C without showing a lifetime
reduction. The explanation of these astonishing findings is
given by the evaluation of energy release rate peaks during
fast transient cooling in combination with the phase
evolution during cooling with the used cooling rates.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000572783300001},
doi = {10.1111/jace.17452},
url = {https://juser.fz-juelich.de/record/884045},
}