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This paper reports the efficacy of tape casting using an Ag–10 wt% CuO filler for the successful joining of a sintered Ce0.9Gd0.1O2–δ–La0.7Sr0.3MnO3±δ (GDC–LSM) ceramic with a SUS 460 FC metal alloy by reactive air brazing. The as-prepared green tape was highly flexible without drying cracks, and the handling was easy when used as a filler material for reactive air brazing. Heat treatment for the GDC–LSM/SUS 460 FC joint was performed at 1050°C for 30 min in air. Microstructural observations indicated a reliable and compact joining. The room temperature mechanical shear strength of the as-brazed joints was 60±8 MPa with a cohesive failure. The flexural strength of joints was measured from room temperature up to 850°C, where the strength retention revealed to be almost 100% at 500°C. However, the joints showed a degradation in strengths at 800 and 850°C, exhibiting strength retentions of 57% and 37%, respectively.

Efficacy of Ag–CuO Filler Tape for the Reactive Air Brazing of Ceramic–Metal Joints