Abstract
This paper reports the effectiveness of a Ag–10wt% CuO braze filler for the joining of dense Ce0.9Gd0.1O2–δ–La0.6Sr0.4Co0.2Fe0.8O3–δ (GDC–LSCF) dual-phase ceramics for the oxygen transport membrane applications. Brazing was performed at 1050°C for 30min in air. The microstructure of the ceramic-filler-ceramic interfaces of the polished cross-sectional areas and the elemental distribution were examined. The results indicated that the Ag–10wt% CuO braze filler ensured reliable and compact joining without the formation of cracks and voids at the joining interface. The room temperature mechanical shear strengths were 59.3 and 40.2MPa for the as-brazed and isothermally aged joints at 800°C for 24h in air, respectively.
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