| Autor: |
Sarantaridis, Dimitris, Rudkin, Robert A., Atkinson, Alan |
| Zdroj: |
ECS Transactions; May 2007, Vol. 7 Issue: 1 p1491-1499, 9p |
| Abstrakt: |
Investigations on SOFCs using Ni-based anode supports are presented aiming at the understanding of how much oxidation such a cell can tolerate before incurring irreversible mechanical damage. The dimensional strains, elastic modulus and porosity of typical anode supports were measured as a function of the degree of oxidation. The mechanical stability of cells incorporating such substrates was studied as a result of oxidation by air and by electrochemical oxidation. The different oxidation procedures performed showed different damage modes. In free-standing cells the main damage mode was electrolyte cracking, but in cell test configurations the cells failed by substrate cracking. This was mainly due to the non-uniform nature of anode oxidation in the cell test configurations which can lead to cell failure when the degree of oxidation is only 5 %. The observations are interpreted using models of the stress generation and fracture processes. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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