Article
High-temperature mechanical behavior of polycrystalline yttrium-doped barium cerate perovskite
Author/s | Vaquero Aguilar, Cristina
López Robledo, Manuel Jesús Martínez Fernández, Julián ![]() ![]() ![]() ![]() ![]() ![]() ![]() Real Pérez, Concepción Jiménez Melendo, Manuel ![]() ![]() ![]() ![]() ![]() ![]() |
Department | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Publication Date | 2011 |
Deposit Date | 2019-02-04 |
Published in |
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Abstract | The high-temperature mechanical properties of the mixed ionic-electronic conductor perovskite BaCe0.95Y0.05O3-δ with average grain size of 0.40μm have been studied in compression between 1100 and 1300°C in air at different ... The high-temperature mechanical properties of the mixed ionic-electronic conductor perovskite BaCe0.95Y0.05O3-δ with average grain size of 0.40μm have been studied in compression between 1100 and 1300°C in air at different initial strain rates. The true stress-true strain curves display an initial stress drop, followed by an extended steady-state stage. As the temperature decreases and/or the strain rate increases, there is a transition to a damage-tolerant strain-softening stage and eventually to catastrophic failure. Analysis of mechanical and microstructural data revealed that grain boundary sliding is the primary deformation mechanism. The strength drop has been correlated with the growth of ultrafine grains during deformation, already present at grain boundaries and triple grain junctions in the as-fabricated material. |
Funding agencies | Ministerio de Ciencia e Innovación (MICIN). España |
Project ID. | MAT2009-13979-C03-01
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Citation | Vaquero Aguilar, C., López Robledo, M.J., Martínez Fernández, J., Real Pérez, C. y Jiménez Melendo, M. (2011). High-temperature mechanical behavior of polycrystalline yttrium-doped barium cerate perovskite. Journal of the European Ceramic Society, 31, 1333-1338. |
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