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| Abstract No.: |
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Scheduled at:
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Monday, June 02, 2008, Auditorium 2 2:40 PM
Solid Oxide Fuel Cell 1
Coatings for SOFC components for mobile and stationary applications, thermal and electrical insulation by thermal sprayed ceramic coatings
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| Title: |
Development of a sealing technical layer for SOFCs applications
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| Authors: |
Nadège Caron* / Commissariat à l'Energie Atomique, FRANCE
Luc Bianchi / Commissariat à l'Energie Atomique, France
Séchel Méthout/ Commissariat à l'Energie Atomique, France
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| Abstract: |
Solid oxide fuel cell are being widely considered as the revolutionary answer to the fossil energy decreasing. To achieve high efficiency and longevity for SOFC stack it is essential to maintain stable hermetic sealing. In order to obtain an efficient airthightness between two SOFC layers, the authors had developped a solid seal composed with a ceramic matrix charged with glass particles. The seal is plasma-sprayed using low-cost manufacturing methods such as atmospheric plasma spraying. This technical deposit can be plasma-sprayed on all types of substrate : whatever its nature and shape. It is solid, distortable and adhesive to its support at ambient temperature. Their properties are acquired when the SOFC is put into service: the glassy phase migrate into the peculiar plasma-sprayed microstructure of the ceramic matrix towards the interface involving the airthightness. The performance of this seal are pretty good : the leak rate observed at 70 mbar is 0,0042 mbar.l/s whereas the preconisation of the US Department of Energy is 0,01 mbar.l/s.
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