MECHANICAL PROPERTIES OF CATHODE-INTERCONNECT INTERFACES IN PLANAR SOFCs
- ORNL
The residual stresses in manganese cobaltite, i.e., Mn1.5Co1.5O4, coatings applied onto alloys 441 and Crofer 22 APU were determined by X-Ray Diffraction. The residual stresses were found to be tensile at 800 C for both systems. The residual stress for spinel-coated AL441 relaxed with time and reached a value of 0.16 0.02 GPa after 300 minutes. The stress relaxation process was slower for spinel-coated Crofer and reached a value of 0.23 0.01 GPa after 500 minutes. Four-point bend SENB testing technique was used to evaluate the toughness of the interfaces between LSM10, i.e., (La0.9Sr0.1)0.98MnO3+δ, and spinel-coated AL441 and Crofer. Sandwich test specimens were prepared by sintering the LSM10 layer at 900 C for four hours in air or under PO2 cyclic conditions. The strain energy release rate was found to be 1.52 0.11 J/m2 for regular sintering and 1.47 0.15 J/m2 for sintering with cyclic PO2 treatment. This difference was found to be statistically insignificant.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Temperature Materials Lab. (HTML)
- Sponsoring Organization:
- FE USDOE - Office of Fossil Energy (FE)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 979155
- Resource Relation:
- Conference: 33rd International Conference and Exposition on Advanced Ceramics and Composites, Daytona Beach, FL, USA, 20090119, 20090123
- Country of Publication:
- United States
- Language:
- English
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