TY  - JOUR
AU  - Chyrkin, A.
AU  - Swadźba, R.
AU  - Pillai, R.
AU  - Galiullin, T.
AU  - Wessel, E.
AU  - Grüner, D.
AU  - Quadakkers, W. J.
TI  - Stability of External α-Al2O3 Scales on Alloy 602 CA at 1100–1200 °C
JO  - Oxidation of metals
VL  - 90
IS  - 1-2
SN  - 1573-4889
CY  - Dordrecht [u.a.]
PB  - Springer Science + Business Media B.V
M1  - FZJ-2018-07255
SP  - 119 - 133
PY  - 2018
AB  - An external ultrathin α-Al2O3 scale grown on the Ni-base alloy 602 CA during air oxidation at 800 °C was characterized by means of high-resolution TEM/EDX and electron diffraction. Alloy samples pre-oxidized at 800 °C were subsequently exposed at 1100, 1150 and 1200 °C for up to 100 h. Whereas the external alumina remained stable at 1100 °C, with the increasing exposure temperature, the pre-grown alumina scale tended to break down resulting in an external chromia scale accompanied by internal alumina precipitation. The transition from external to internal Al oxidation was investigated using SEM/EDX/EBSD. The critical Al depletion at the scale-alloy interface during the post-exposure at 1100–1200 °C was modeled using the CALPHAD-based thermodynamic-kinetic approach.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000437751900007
DO  - DOI:10.1007/s11085-017-9827-0
UR  - https://juser.fz-juelich.de/record/858369
ER  -