%0 Journal Article
%A Zou, Ying
%A Schulze-Küppers, Falk
%A Malzbender, Jürgen
%T Creep behavior of porous La$_{0.6}$Sr$_{0.4}$Co$_{0.2}$Fe0.8$_{O3−δ}$ oxygen transport membrane supports
%J Ceramic forum international
%V 41
%N 3, Part A
%@ 0173-9913
%C Baden-Baden
%I Göller
%M FZJ-2015-01996
%P 4064-4069
%D 2015
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000350188900096
%R 10.1016/j.ceramint.2014.11.100
%U https://juser.fz-juelich.de/record/188672