Brazing of metallic conductors onto ceramic plates in solid oxide fuel cells - Part II Attaching conducting wires

Commercialization of the solid oxide fuel cell (SOFC) will be facilitated b y use of conventional materials and fabrication processes. In this paper, w e discuss the results of brazing metallic wires, made of conventional heat- resisting alloys, onto metallic CrFe5Y(2)O(3)1 conductor plates in SOFC. Su ch wires would be used for the current transport between individual SOFC st acks and to the power-consuming device. Aluminum-alloyed ferritic stainless steels (iron, 20 to 25 wt% chromium, 4.5 to 6 wt% aluminum) and Inconel 61 7 were found to be suitable materials for the wires. They can be brazed ont o CrFe5Y(2)O(3)1 using L-Ni 5 as filler for Inconel 617 and the ferritic st eels, and Cr50Ni or L-Ni 5 for the ferritic steels. The effectiveness of th e brazed conductor/CrFe5Y(2)O(3)1 joints was verified by monitoring their r esistance at 1000 degreesC in air for 1000 h. (C) 2001 Kluwer Academic Publ ishers.