Reactive air brazing: A novel method of sealing SOFCs and other solid-state electrochemical devices

Journal Article · Mon Feb 28 00:00:00 EST 2005 · Electrochemical and Solid-State Letters, 8(2):A133-136

DOI:https://doi.org/10.1149/1.1850391· OSTI ID:948769

Weil, K Scott; Kim, Jin Yong Y; Hardy, John S

High temperature electrochemical devices operate via an ion gradient that develops across a solid electrolyte; consequently, hermeticity across this membrane is paramount. Not only must the electrolyte contain no interconnected porosity, but it must be connected to device chassis with a gas-tight seal. Here we report a new method of brazing developed specifically for solid-state electrochemical applications. We demonstrate that the seal is hermetic and resistant to thermal aging, can be thermally cycled under rapid heating rates with no measurable loss in seal strength, and has shown promise in sealing full-size pSOFC components.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 948769
• Report Number(s): PNNL-SA-42748; AA1510100; TRN: US200907%%191
• Journal Information: Electrochemical and Solid-State Letters, 8(2):A133-136, Vol. 8, Issue 2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
30 DIRECT ENERGY CONVERSION
SOLID ELECTROLYTE FUEL CELLS
SEALS
BRAZING
POROSITY
HEAT RESISTANT MATERIALS
THERMAL CYCLING
air brazing
sealing
solid oxide fuel cell