TY  - JOUR
AU  - Zou, Ying
AU  - Schulze-Küppers, Falk
AU  - Balaguer, María
AU  - Malzbender, Jürgen
AU  - Krüger, Manja
TI  - Creep Behavior of Porous La0.6Sr0.4Co0.2 Fe0.8O3-δ Substrate Material for Oxygen Separation Application
JO  - Journal of the European Ceramic Society
VL  - 38
IS  - 4
SN  - 0955-2219
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2018-02123
SP  - 1702 - 1710
PY  - 2018
AB  - Advanced oxygen transport membrane designs consist of a thin functional layer supported by a porous substrate material that carries mechanical loads. Creep deformation behavior is to be assessed to warrant a long-term reliable operation at elevated temperatures. Aiming towards an asymmetric composite, the current study reports and compares the creep behavior of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) perovskite porous substrate material with different porosity and pore structures in air for a temperature range of 800–1000 °C. A porosity and pore structure independent average stress exponent and activation energy are derived from the deformation data, both being representative for the LSCF material. To investigate the structural stability of the dense layer in an asymmetric membrane, sandwich samples of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) and La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) with porous substrate and dense layers on both side were tested by three-point bending with respect to creep rupture behavior of the dense layer. Creep rupture cracks were observed in the tensile surface of BSCF, but not in the case of LSCF.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000424716700088
DO  - DOI:10.1016/j.jeurceramsoc.2017.12.041
UR  - https://juser.fz-juelich.de/record/844743
ER  -