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@ARTICLE{Wakui:57566,
author = {Wakui, T. and Malzbender, J. and Steinbrech, R. W.},
title = {{M}echanical testing of thermally stressed materials with
rough interfaces: mechanically induced delamination cracking
in thermal barrier composites},
journal = {Surface and coatings technology},
volume = {200},
issn = {0257-8972},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-57566},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {Interfacial fracture of thermally stressed layered
composites is often characterized by application of a
mechanical load. Here a novel mechanical testing method was
applied to study the delamination of thermal barrier
composites. With a geometry similar to the double cantilever
beam compressive loading was transferred into tensile stress
normal to the average location of the interfaces. As-sprayed
and annealed composites were tested. Fracture relevant
microstructural changes and crack growth in the top coat and
at the interface between bond coat and top coat were
monitored using scanning electron microscopy. The local
strain situation was determined via the analysis of the
image contrast. Finite element modeling was used to
illustrate the effect of the interface roughness on the
failure origin. Similar as reported in literature for
thermal loading, mechanical loading of a rough interface
causes high stresses in interfacial roughness peaks and
valleys. However, contrary to thermal loading, the position
of the maximum in tensile and compressive stress is
independent of the existence of a thermally grown oxide.
Implications for the mechanical and then-no-mechanical
testing of layered composites are discussed. (c) 2005
Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {IWV-2},
ddc = {620},
cid = {I:(DE-Juel1)VDB2},
pnm = {Rationelle Energieumwandlung},
pid = {G:(DE-Juel1)FUEK402},
shelfmark = {Materials Science, Coatings $\&$ Films / Physics, Applied},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000236648800030},
doi = {10.1016/j.surfcoat.2005.07.002},
url = {https://juser.fz-juelich.de/record/57566},
}