TY  - JOUR
AU  - Garcia-Fresnillo, L.
AU  - Shemet, V.
AU  - Chyrkin, A.
AU  - de Haart, L. G. J.
AU  - Quadakkers, W. J.
TI  - 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
JO  - Journal of power sources
VL  - 271
IS  - 20
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2014-04362
SP  - 213-222
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000343391600029
DO  - DOI:10.1016/j.jpowsour.2014.07.189
UR  - https://juser.fz-juelich.de/record/155181
ER  -