Abstract:
A solid oxide fuel cell (SOFC) stack having a glass seal sandwiched between the sealing surfaces of adjacent cassettes, in which at least one cassette includes means for interlocking the glass seal onto the sealing surface of the cassette for improved adhesion and durability of the glass seal. The at least one cassette includes a plurality of perforations configured to receive and lock onto a portion of the glass seal. At least one of the perforations includes a through-hole having an exterior opening on the sealing surface and an interior opening on the interior surface of the cassette. A portion of the glass seal is received in the perforation forming a glass column in the through-hole and a flared glass end on the interior surface surrounding the interior opening. The flared glass end cooperates with the glass column to interlock the glass seal onto the cassette's sealing surface.