JIMÉNEZ MELENDO , Manuel

The high-temperature mechanical behavior of polycrystalline 5 at% yttrium-doped barium cerate with submicronic grain size (d = 0.5 µm) has been studied in compression between 1200 and 1300 °C at different initial strain rates. The true stress – strain curves display an initial peak stress followed by a softening stage and then by an extended...

Uniaxial compression tests were conducted on perovskite-structured barium cerate polycrystals doped with 5-at.% yttrium and 5-at.% ytterbium and submicrometric grain sizes, at temperatures between 1423 and 1573 K (0.70–0.78Tm) and different initial strain rates. In contrast to conventional superplastic ceramics, the stress–strain curves show a...

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