TY  - JOUR
AU  - Vasechko, V.
AU  - Huang, B.
AU  - Ma, Qianli
AU  - Tietz, Frank
AU  - Malzbender, Jürgen
TI  - Thermomechanical Properties of Y-Substituted SrTiO$_{3}$ Used as Re-oxidation Stable Anode Substrate Material
JO  - Journal of the European Ceramic Society
VL  - 34
IS  - 15
SN  - 1873-619X
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2014-05181
SP  - 3749-3754
PY  - 2014
AB  - Re-oxidation robustness is important to warrant a reliable operation of anode-supported solid oxide fuel cell systems. The current work concentrates on the mechanical properties of re-oxidation stable Y-substituted SrTiO3 ceramic for the use as anode substrate material. Room temperature micro-indentation yielded Young's modulus and hardness of 160 and 7 GPa, respectively, whereas the temperature-dependent modulus was measured with a resonance-based method up to ∼950 °C. The effective Young's modulus as a function of porosity was measured at room temperature and compared with fracture strength data. The fracture toughness was assessed using a combination of pre-indentation cracks and bending test. Creep rates were measured at 800 and 900 °C in a 3-point bending configuration. Post-test fractographic analysis performed using stereo, confocal and scanning electron microscopy, revealed important information on fracture origins and critical defects in the material. A methodology to assess the mechanical properties of porous materials is suggested.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000340976200033
DO  - DOI:10.1016/j.jeurceramsoc.2014.05.013
UR  - https://juser.fz-juelich.de/record/156442
ER  -