%0 Journal Article
%A Vasechko, V.
%A Huang, B.
%A Ma, Qianli
%A Tietz, Frank
%A Malzbender, Jürgen
%T Thermomechanical Properties of Y-Substituted SrTiO$_{3}$ Used as Re-oxidation Stable Anode Substrate Material
%J Journal of the European Ceramic Society
%V 34
%N 15
%@ 1873-619X
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2014-05181
%P 3749-3754
%D 2014
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000340976200033
%R 10.1016/j.jeurceramsoc.2014.05.013
%U https://juser.fz-juelich.de/record/156442