Anomalies in the thermomechanical behavior of Ba0.5Sr0.5Co0.8e0.2O3sigma ceramic oxygen conductive membranes at intermediate temperatures

Huang, B.X.; Grychtol, P.; Steinbrech, R. W.; Malzbender, J.; Schneider, C. M.; Singheiser, L.

doi:10.1063/1.3193657

Journal Article

Anomalies in the thermomechanical behavior of Ba0.5Sr0.5Co0.8e0.2O3sigma ceramic oxygen conductive membranes at intermediate temperatures

Huang, B. X.FZJ* ; Malzbender, J.FZJ* ; Steinbrech, R. W.FZJ* ; Grychtol, P.FZJ* ; Schneider, C. M.FZJ* ; Singheiser, L.FZJ*

2009
American Institute of Physics Melville, NY

Applied physics letters 95, 051901 (2009) [10.1063/1.3193657]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/17267 doi:10.1063/1.3193657

Abstract: The thermomechanical properties of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) were measured using ring-on-ring tests and depth-sensitive microindentation. The cubic BSCF material exhibits an anomaly in mechanical properties between 200 and 400 degrees C. The observed anomaly is attributed to the transition of Co3+ spin states which is experimentally confirmed by susceptibility measurements. Furthermore, slip lines were observed around the impression when indentation tests were carried out above 260 degrees C.

Keyword(s): J ; barium compounds (auto) ; ceramics (auto) ; cobalt compounds (auto) ; elastic constants (auto) ; fracture (auto) ; indentation (auto) ; optical susceptibility (auto) ; strontium compounds (auto) ; thermomechanical treatment (auto)

Classification:

Physics, Applied

Note: The work was funded by the German Helmholtz Gemeinschaft as part of the research activities in the MEMBRAIN Alliance Contract HA-104. The authors would like to express their gratitude to W. Meulenberg and S. Baumann for preparing and providing the disk-shaped specimens. In addition, most valuable characterization support was provided by E. Wessel (SEM investigations) and J. Penkalla (TEM), and A. Mobius and T. Markus (DTA/TG)

Contributing Institute(s):

Research Program(s):