Mechanical reliability of Ce0.8Gd0.2O2−δ‐FeCo2O4 dual phase membranes synthesized by one‐step solid‐state reaction

• DOI: 10.1111/jace.17583
• Publication Date: 2020-11-21T01:48:21Z
• Authors: Fanlin Zeng; Jürgen Malzbender; Stefan Baumann; Wenyu Zhou; Mirko Ziegner; Arian Nijmeijer; Olivier Guillon; Ruth Schwaiger; Wilhelm Albert Me...
• Keywords: oxygen transport membrane; info:eu-repo/classification/ddc/660; 660; UT-Hybrid-D; residual stress; dual phase ceramic composite; 02 engineering and technology; mechanical properties; 0210 nano-technology; 7. Clean energy; lifetime prediction

Abstract Ce 0.8 Gd 0.2 O 2− δ ‐FeCo 2 4 composites are attractive candidate materials for high‐purity oxygen generation providing robust chemical stability. Aiming future industrial applications, a feasible solid‐state reaction process with one thermal processing step was used to synthesize 50 wt% :50 FeCo and 85 :15 composites. Mechanical reliabilities of the sintered membranes were assessed based on characterized mechanical properties subcritical crack growth behavior. In general, fracture strengths as‐sintered reduced by tensile residual stresses microcracks. particular, enhanced behavior, which leads limited stress tolerance high failure probability after 10‐year operation, evaluated in more detail. Further improvements needed eliminate microcracks warrant long‐term reliable operation