Changes in the mechanical properties of support materials for segmented-in-series type solid oxide fuel cells as a function of time
Abstract
As the substrate materials for segmented-in-series type solid oxide fuel cells (SOFCs), the mechanical characteristics, such as Young's modulus, of Al2O3-NiO-YSZ, TiO2-NiO-YSZ and MgO-NiO-YSZ were examined under SOFC operating conditions. The Young's modulus for all of the samples decreased at a high temperature. For the Al2O3-NiO-YSZ samples, the behaviours of the Young's modulus changed at each process including as-sintered, 100 h reduction and 2000 h reduction. For the TiO2-NiO-YSZ samples, the Young's modulus behaviour varied between the as-sintered and reduced samples. However, further reduction did not change the behaviour of the Young's modulus. For the MgO-NiO-YSZ samples, the Young's modulus of the samples exhibited a nearly constant behaviour through the sequence of processes from as-sintered to 100 h reduction and 2000 h reduction. Based on the microstructural analysis, the compositions of the framework of the samples and the sliding of the grain boundary strongly affected the Young's modulus.
- Publication:
-
Journal of Power Sources
- Pub Date:
- January 2014
- DOI:
- 10.1016/j.jpowsour.2013.07.071
- Bibcode:
- 2014JPS...246..141S
- Keywords:
-
- Solid oxide fuel cell;
- Segmented-in-series;
- Elastic modulus;
- Insulating material