%0 Journal Article
%A Pillai, R.
%A Wessel, E.
%A Nowak, W. J.
%A Naumenko, D.
%A Quadakkers, W. J.
%T Predicting Effect of Base Alloy Composition on Oxidation- and Interdiffusion-Induced Degradation of an MCrAlY Coating
%J JOM
%V 70
%N 8
%@ 1543-1851
%C [S.l.]
%I TMS
%M FZJ-2018-07261
%P 1520 - 1526
%D 2018
%X The effect of two base alloys, viz. Ni-based superalloy Rene 80 and Co-based alloy ECY768, on the oxidation and interdiffusion behavior of a NiCoCrAlY Re-containing coating after exposure for up to 2000 h at 1050°C in synthetic air has been evaluated. Scanning electron microscopy with energy-dispersive x-ray spectroscopy was employed to measure the element concentrations, and phases were identified by electron backscatter diffraction. Significant depletion of β-NiAl within the coating, enrichment of γ′-phase, and formation of µ-phase in the alloy and Kirkendall porosity at the coating–alloy interface were observed in the coating on Rene 80. In contrast, the coating on the Co-base alloy ECY768 formed large amounts of Cr/Re-rich carbides and the depletion of β-NiAl phase was less pronounced than that observed on the Ni-base alloy. These findings could be interpreted using an in-house-developed thermodynamic–kinetic CALPHAD-based computer model.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000440845900028
%R 10.1007/s11837-018-2950-9
%U https://juser.fz-juelich.de/record/858375