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@ARTICLE{Gatzen:863292,
author = {Gatzen, Caren and Mack, Daniel Emil and Guillon, Olivier
and Vaßen, Robert},
title = {{S}urface roughening of {A}l 2 {O} 3 /{A}l 2 {O} 3 -ceramic
matrix composites by nanosecond laser ablation prior to
thermal spraying},
journal = {Journal of laser applications},
volume = {31},
number = {2},
issn = {1938-1387},
address = {Orlando, Fla.},
publisher = {Laser Inst. of America},
reportid = {FZJ-2019-03379},
pages = {022018 -},
year = {2019},
abstract = {Al2O3/Al2O3 ceramic matrix composites are candidate
materials for high-temperature applications such as gas
turbines. As water vapor corrosion of Al2O3/Al2O3-CMC
(ceramic matrix composite) is a major issue, the application
of suitable environmental barrier coatings is inevitable. An
important factor for coating adhesion, especially in thermal
spraying, is mechanical interlocking. Therefore, a rough
substrate surface is needed. Although it has been proven
that laser ablation is a suitable method for surface
preparation of metallic substrates, no studies on
Al2O3/Al2O3-CMCs are available. Therefore, the suitability
of surface preparation of an Al2O3/Al2O3-CMC by laser
ablation for use prior to atmospheric plasma spraying was
examined. The laser ablation threshold fluence for
Al2O3/Al2O3-CMC was determined. The effects of different
processing parameters on the surface were studied. Various
surface morphologies were obtained, such as cauliflower and
honeycomb structures. The samples were characterized by
white light interferometry, laser microscopy, and scanning
electron microscopy. The obtained surface structures were
coated with Gd2Zr2O7. It was found that the adhesion
strength of coatings on laser treated samples was
drastically increased.},
cin = {IEK-1 / JARA-ENERGY},
ddc = {530},
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:000484435200019},
doi = {10.2351/1.5080546},
url = {https://juser.fz-juelich.de/record/863292},
}