TY  - JOUR
AU  - Ebrahimzade, V.
AU  - Uchtmann, H.
AU  - Singheiser, L.
AU  - Küger, M.
AU  - Malzbender, J.
TI  - Microstructure and cyclic oxidation behavior of APS TBC systems drilled with various laser methods
JO  - Surface and coatings technology
VL  - 378
SN  - 0257-8972
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2020-01938
SP  - 125018 -
PY  - 2019
AB  - Aiming towards an optimization of drilling of cooling holes for gas turbine applications, thermal barrier coated specimens were drilled with different laser set-ups. The investigated TBC system consists of an APS deposited TBC systems, a MCrAlY bond coating (BC), and a Nickel-based super alloy. The microstructural analysis was performed after laser drilling and also cyclic oxidation tests, in order to understand the influence of different laser drilling parameters, i.e. trepanation/percussion drilling, long-pulsed and ultra-short pulsed lasers, and hole angle. Aiming towards this, the first test series consisted of an assessment of specimens that were laser drilled with different parameters which were only analyzed regarding microstructural aspects, whereas the second series was based on specimens that were laser drilled with various laser parameters which were subsequently tested by cyclic oxidization experiments. Initiation and progress of delamination as function of the number of cycles was assessed from thermography images and correlated with complementary finite element analysis.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000503100800071
DO  - DOI:10.1016/j.surfcoat.2019.125018
UR  - https://juser.fz-juelich.de/record/875307
ER  -