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Evolution of grain shape and size during high-temperature creep of a yttria-doped fine-grained alumina

✍ Scribed by P. Gruffel; F. Righetti; C. Carry

Publisher: Springer
Year: 1993
Tongue: English
Weight: 658 KB
Volume: 28
Category: Article
ISSN: 0022-2461
DOI: 10.1007/bf00367562

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✦ Synopsis

A semi-automatic method of image analysis was used to characterize the evolution of the microstructure of a polycrystalline alumina in terms of grain size and grain shape during different thermomechanical treatments. This study showed that for this material normal grain growth occurs during compressive creep and annealing; in addition, during creep under certain conditions grains flatten in the direction of the applied stress. Three-dimensional estimation of the grain shape was performed by analysing differently oriented plane sections of the specimens.

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