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- W2091059547 abstract "Abstract The enhanced proton conductivity exhibited by trivalent cation-doped barium cerate perovskites makes these materials excellent candidates for electrochemical applications, in particular as electrolytes for solid oxide fuel cells. These devices operate at elevated temperatures, where creep and other deformation processes influence the overall efficiency and lifetime. In this work, the high-temperature plastic deformation mechanisms of fine-grained 5 at.% Yb-doped BaCeO 3 polycrystals produced by conventional solid-state reaction has been investigated by means of compressive tests at constant load between 1150 and 1250 °C in air. The creep curves show an unusual sigmoidal behavior, followed by extended steady states of deformation. Grain boundary sliding is the main deformation mechanism, characterized by a stress exponent n of 2, as found in other fine-grained superplastic ceramics and metals." @default.
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- W2091059547 date "2012-10-01" @default.
- W2091059547 modified "2023-10-03" @default.
- W2091059547 title "High-temperature plastic deformation mechanisms of ytterbium-doped barium cerate proton conductor" @default.
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- W2091059547 doi "https://doi.org/10.1016/j.ssi.2012.03.031" @default.
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