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@ARTICLE{Frommherz:280237,
author = {Frommherz, Martin and Scholz, Alfred and Oechsner, Matthias
and Bakan, Emine and Vassen, Robert},
title = {{G}adolinium zirconate/{YSZ} thermal barrier coatings:
{M}ixed-mode interfacial fracture toughness and sintering
behavior},
journal = {Surface and coatings technology},
volume = {286},
issn = {0257-8972},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-00044},
pages = {119 - 128},
year = {2016},
abstract = {In this work, the delamination toughness and the sintering
behavior of modern double-layer thermal barrier coatings of
type gadolinium zirconate (GZO)/yttrium-stabilized zirconia
(YSZ) are investigated in detail. These properties mainly
determine the strain tolerance and thus the performance of
thermal barrier coatings (TBCs). The delamination toughness
was determined using a modified four-point bending setup. It
is shown that the delamination behavior differs
significantly from conventional monolayer coatings and is
highly dependent on the specific microstructure of the GZO
layer. The stiffness and sintering behavior of freestanding
GZO layers were determined using impulse excitation, a test
method sensitive to the global stiffness of the ceramic
coating. The increase in stiffness is thereby correlated to
microstructural changes, explicitly the healing of
micro-cracks and the sintering of inter-lamellar cracks and
unmolten particles. The results reveal that the specific
spray structure of GZO has a great influence on the sinter
stability which results in a characteristic temperature
dependency. In this case the GZO coatings have an advantage
in comparison to conventional YSZ coatings attemperatures
above 1300 °C.},
cin = {IEK-1},
ddc = {620},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
Training in Energy and Climate Research (HITEC)
(HITEC-20170406)},
pid = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000368965300015},
doi = {10.1016/j.surfcoat.2015.12.012},
url = {https://juser.fz-juelich.de/record/280237},
}