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Plastic deformation of dense nanocrystalline yttrium oxide at elevated temperatures

Gallardo-López, Angela and Domínguez-Rodríguez, Arturo and Estournès, Claude and Marder, Rachel and Chaim, Rachman Plastic deformation of dense nanocrystalline yttrium oxide at elevated temperatures. (2012) Journal of the European Ceramic Society, 32 (12). 3115-3121. ISSN 0955-2219

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2012.04.035

Abstract

Nanocrystalline yttrium oxide, Y2O3 with 110 nm average grain size was plastically deformed between 800 ◦C and 1100 ◦C by compression at different strain rates and by creep at different stresses. The onset temperature for plasticity was at 1000 ◦C. Yield stress was strongly temperature dependent and the strain hardening disappeared at 1100 ◦C. The polyhedral and equiaxed grain morphology were preserved in the deformed specimens. The experimentally measured and theoretically calculated stress exponent n = 2 was consistent with the plastic deformation by grain boundary sliding. Decrease in the grain size was consistent with decrease in the brittle to ductile transition temperature.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S095522191200249X
HAL Id:hal-00836868
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Technion – Israel Institute of Technology (ISRAEL)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidad de Sevilla (SPAIN)
Laboratory name:
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Deposited By: cirimat webmestre
Deposited On:21 Jun 2013 14:08

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