TY  - JOUR
AU  - Zou, Ying
AU  - Schulze-Küppers, Falk
AU  - Malzbender, Jürgen
TI  - Creep behavior of porous La$_{0.6}$Sr$_{0.4}$Co$_{0.2}$Fe0.8$_{O3−δ}$ oxygen transport membrane supports
JO  - Ceramic forum international
VL  - 41
IS  - 3, Part A
SN  - 0173-9913
CY  - Baden-Baden
PB  - Göller
M1  - FZJ-2015-01996
SP  - 4064-4069
PY  - 2015
AB  - Advanced oxygen transport membrane designs rely upon a thin functional layer supported by a porous substrate material that carries the mechanical loads. The creep deformation behavior needs to be assessed in order to warrant a long-term reliable operation at elevated temperatures. The current study reports the creep behavior of porous La0.6Sr0.4Co0.2Fe0.8O3−δ in air for a temperature range of 750–950 °C. Stress exponents and activation energies are derived from the deformation data. A comparison with the creep rates of dense material revealed a progressively increasing creep rate with increasing temperature that might be related to surface diffusional effects. Additional tests at room temperature revealed non-linear stress–strain curves and an apparent ferroelastic creep due to domain switching in the rhombohedral phase that is stable at lower temperature.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000350188900096
DO  - DOI:10.1016/j.ceramint.2014.11.100
UR  - https://juser.fz-juelich.de/record/188672
ER  -