Abstract
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 language | English |
|---|---|
| Pages (from-to) | 1041-1052 |
| Number of pages | 12 |
| Journal | Journal of the European Ceramic Society |
| Volume | 32 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2012 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Strength
- fuel sells
- sintering
- porosity
- optimization