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| Hauptseite > Workflowsammlungen > Publikationsgebühren > Micromechanical Characterization of Ce$_{0.8}$ Gd$_{0.2}$ O$_{2‐ δ–}$ FeCo$_{2}$ O$_{4}$ Dual Phase Oxygen Transport Membranes |
| Hauptseite > Workflowsammlungen > Publikationsgebühren > Micromechanical Characterization of Ce$_{0.8}$ Gd$_{0.2}$ O$_{2‐ δ–}$ FeCo$_{2}$ O$_{4}$ Dual Phase Oxygen Transport Membranes |
| Journal Article | FZJ-2020-01377 |
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2020
Deutsche Gesellschaft für Materialkunde
Frankfurt, M.
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Please use a persistent id in citations: http://hdl.handle.net/2128/25160 doi:10.1002/adem.201901558
Abstract: Aiming toward an optimization of dual phase oxygen transport membrane materials for oxygen separation applications, ceramic composites consisting of a Ce1−xGdxO2−δ (0 < x < 0.2) fluorite phase, Gd0.9Ce0.1Fe0.8Co0.2O3 perovskite phase, FexCo3−xO4 (0 < x < 1) spinel phase, and CoO rock salt phase are developed and micromechanical properties (elastic modulus and hardness) of xCe0.8Gd0.2O2−δ: (1−x)FeCo2O4 (50 wt% ≤ x ≤ 90 wt%) composites are characterized via indentation testing at room temperature. The results obtained at low indentation loads indicate that the magnitude of the elastic moduli of the different phases is in the order Gd0.9Ce0.1Fe0.8Co0.2O3 > Ce1−xGdxO2−δ ≈ FexCo3−xO4 > CoO, and furthermore, hardness values are also in the same order. The hardness values of the obtained composites at higher impression loads reveal a stronger dependency on porosity than on composition due to similar hardness values of the main phases. Any compositional effect appears to diminish above a porosity of ≈1%.
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