TY  - JOUR
AU  - Zeng, Fanlin
AU  - Malzbender, Jürgen
AU  - Baumann, Stefan
AU  - Zhou, Wenyu
AU  - Ziegner, Mirko
AU  - Nijmeijer, Arian
AU  - Guillon, Olivier
AU  - Schwaiger, Ruth
AU  - Meulenberg, Wilhelm Albert
TI  - Mechanical reliability of Ce 0.8 Gd 0.2 O 2− δ ‐FeCo 2 O 4 dual phase membranes synthesized by one‐step solid‐state reaction
JO  - Journal of the American Ceramic Society
VL  - 104
IS  - 4
SN  - 1551-2916
CY  - Westerville, Ohio
PB  - Soc.
M1  - FZJ-2021-00605
SP  - 1814-1830
PY  - 2020
AB  - Ce0.8Gd0.2O2−δ‐FeCo2O4 composites are attractive candidate materials for high‐purity oxygen generation providing robust chemical stability. Aiming for future industrial applications, a feasible solid‐state reaction process with one thermal processing step was used to synthesize 50 wt% Ce0.8Gd0.2O2−δ:50 wt% FeCo2O4 and 85 wt% Ce0.8Gd0.2O2−δ:15 wt% FeCo2O4 composites. Mechanical reliabilities of the sintered membranes were assessed based on the characterized mechanical properties and subcritical crack growth behavior. In general, the fracture strengths of as‐sintered membranes were reduced by tensile residual stresses and microcracks. In particular, the enhanced subcritical crack growth behavior, which leads to limited stress tolerance and high failure probability after a 10‐year operation, was evaluated in more detail. Further materials and processing improvements are needed to eliminate the tensile stress and microcracks to warrant a long‐term reliable operation of the composites.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000595824300001
DO  - DOI:10.1111/jace.17583
UR  - https://juser.fz-juelich.de/record/890011
ER  -