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@ARTICLE{Leng:856435,
author = {Leng, Wencai and Pillai, R. and Huczkowski, P. and
Naumenko, D. and Quadakkers, W. J.},
title = {{M}icrostructural {E}volution of an {A}luminide {C}oating
on {A}lloy 625 {D}uring {W}et air exposure at 900 °{C}
and 1000 °{C}},
journal = {Surface and coatings technology},
volume = {354},
issn = {0257-8972},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science84367},
reportid = {FZJ-2018-05834},
pages = {268 - 280},
year = {2018},
abstract = {The microstructural changes of the aluminized alloy 625
during cyclic oxidation in $air + 6\%$ H2O at 900 °C
and 1000 °C were analyzed using optical metallography
(OM), scanning electron microscopy (SEM) with energy and
wave length dispersive X-ray analysis (EDX/WDX) as well as
electron backscatter diffraction (EBSD). An in-house
developed thermodynamic-kinetic procedure was employed to
predict the microstructural evolution of aluminized alloy
625 during high temperature exposure by considering
simultaneously occurring surface oxidation and
interdiffusion processes. Due to the lack of mobility data
for the relevant alloying elements in the σ-phase,
assumptions for the mobilities were made based on the value
of the mobilities in α-Cr. Despite these assumptions, the
calculated results were found to be in good agreement with
experimental observations. The complete depletion of β-NiAl
in the coating observed during exposure at 1000 °C was
correctly predicted by the model. The model was also able to
predict dissolution of the precipitate phases α-Cr and σ
in the interdiffusion zone during exposures at 900 °C and
1000 °C. The model was however unable to predict the
formation of the μ-phase in the alloy after 1000 h of
exposure at 1000 °C. The developed modelling approach
offers the potential to predict microstructural changes of
aluminized nickel base alloys thus reducing cost and time
consuming experimental efforts.},
cin = {IEK-2},
ddc = {670},
cid = {I:(DE-Juel1)IEK-2-20101013},
pnm = {111 - Efficient and Flexible Power Plants (POF3-111)},
pid = {G:(DE-HGF)POF3-111},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000447475100030},
doi = {10.1016/j.surfcoat.2018.09.043},
url = {https://juser.fz-juelich.de/record/856435},
}