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@ARTICLE{Pillai:867597,
author = {Pillai, R. and Jalowicka, A. and Galiullin, T. and
Naumenko, D. and Ernsberger, M. and Herzog, R. and
Quadakkers, W. J.},
title = {{S}imulating the effect of aluminizing on a
{C}o{N}i{C}r{A}l{Y}-coated {N}i-base superalloy},
journal = {Calphad},
volume = {65},
issn = {0364-5916},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2019-06218},
pages = {340 - 345},
year = {2019},
abstract = {MCrAlY (M = Ni, Co) coatings are commonly used on
gas-turbine components as oxidation resistant overlay
coatings and bondcoats for thermal barrier systems. The
present work focuses on the effect of the aluminizing
process on the CoNiCrAlY coating microstructure. In the
as-received condition the outer part of the coating
consisted mostly of β-(Ni,Co)Al with interspersed
precipitates of Cr-rich carbide and Cr-rich boride
precipitates. Formation of σ-CoCr was observed at the
interface between the β-layer and the inner initial
CoNiCrAlY microstructure. Scanning electron microscopy (SEM)
combined with energy and wavelength-dispersive X-ray
spectroscopy (EDX/WDX) was employed to characterize the
aluminized CoNiCrAlY coating. Phases were then identified by
electron backscatter diffraction (EBSD). Detailed
microstructural studies of the coating were corroborated
with the help of coupled thermodynamic-kinetic calculations
to model the aluminizing process. The calculations were
performed with the in-house developed code employing the
commercially available thermodynamic and kinetic databases
(ThermoCalc). The mechanisms of the observed microstructural
changes were elucidated with the help of the modelling
results.},
cin = {IEK-2},
ddc = {540},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000470946700034},
doi = {10.1016/j.calphad.2019.04.004},
url = {https://juser.fz-juelich.de/record/867597},
}