Optimization of the strength of SOFC anode supports

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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During operation solid oxide fuel cells are stressed by temperature gradients and various internal and external mechanical loads, which must be withstood. This work deals with the optimization of the strength of as-sintered anode supported half-cells by imposing changes to production parameters, such as powder milling and sintering temperature. The strength was measured with the ball-on-ring method, and analyzed with a large displacement finite element model. Weibull statistics were used to describe the distribution of strengths. The influence on the Weibull strength of the many different processing parameters was found to be quantifiable in terms of cell porosity to a large extent. The results were validated with an independent set of measurements of strength and stiffness by uniaxial tension and the impulse excitation technique, respectively. For application of the finding in relation to the SOFC technology a mathematical frame to determine the optimal porosity of a SOFC system is presented.
Original languageEnglish
JournalEuropean Ceramic Society. Journal
Volume32
Issue number5
Pages (from-to)1041-1052
ISSN0955-2219
DOIs
StatePublished - 2012
Peer-reviewedYes
CitationsWeb of Science® Times Cited: 12

Keywords

  • Sintering, Strength, Fuel cells, Porosity, Optimization
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