TY - GEN
T1 - Mechanical properties of cathode-interconnect interfaces in planar SOFCs
AU - Wang, Yanli
AU - Armstrong, Beth L.
AU - Trejo, Rosa M.
AU - Bai, Jianming
AU - Watkins, Thomas R.
AU - Lara-Curzio, Edgar
PY - 2010
Y1 - 2010
N2 - The residual stresses in manganese cobaltite, i.e., Mn1.5C0 1.5O4, 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.l)0.98MnO 3+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.
AB - The residual stresses in manganese cobaltite, i.e., Mn1.5C0 1.5O4, 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.l)0.98MnO 3+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.
UR - http://www.scopus.com/inward/record.url?scp=77952001216&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77952001216
SN - 9780470457542
T3 - Ceramic Engineering and Science Proceedings
SP - 221
EP - 229
BT - Advances in Solid Oxide Fuel Cells V - A Collection of Papers Presented at the 33rd International Conference on Advanced Ceramics and Composites
T2 - Advances in Solid Oxide Fuel Cells V - 33rd International Conference on Advanced Ceramics and Composites
Y2 - 18 January 2009 through 23 January 2009
ER -