%0 Journal Article
%A Garcia-Fresnillo, L.
%A Shemet, V.
%A Chyrkin, A.
%A de Haart, L. G. J.
%A Quadakkers, W. J.
%T Long-term behaviour of solid oxide fuel cell interconnect materials in contact with Ni-mesh during exposure in simulated anode gas at 700 and 800°C
%J Journal of power sources
%V 271
%N 20
%@ 0378-7753
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2014-04362
%P 213-222
%D 2014
%X In the present study the long-term behaviour of two ferritic steels, Crofer 22 APU and Crofer 22H, in contact with a Ni-mesh during exposure in simulated anode gas, Ar–4%H2–2%H2O, at 700 and 800 °C for exposure times up to 3000 h was investigated. Ni diffusion from the Ni-mesh into the steel resulted in the formation of an austenitic zone whereas diffusion of iron and chromium from the steel into the Ni-mesh resulted in the formation of chromia base oxides in the Ni-mesh. Depending on the chemical composition of the steel, the temperature and the exposure time, interdiffusion processes between ferritic steel and Ni-mesh also resulted in σ-phase formation at the austenite–ferrite interface and in Laves-phase dissolution in the austenitic zone. The extent and morphology of the σ-phase formation are discussed on the basis of thermodynamic considerations, including reaction paths in the ternary alloy system Fe–Ni–Cr.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000343391600029
%R 10.1016/j.jpowsour.2014.07.189
%U https://juser.fz-juelich.de/record/155181