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dc.creatorGómez García, Diego
dc.creatorZapata Solvas, Eugenio
dc.creatorDomínguez Rodríguez, Arturo
dc.creatorKubin, Ladislas P.
dc.date.accessioned2015-06-11T10:17:22Z
dc.date.available2015-06-11T10:17:22Z
dc.date.issued2009
dc.identifier.issn1098-0121es
dc.identifier.issn1550-235X
dc.identifier.urihttp://hdl.handle.net/11441/25492
dc.description.abstractThe discovery of superplasticity in ceramics polycrystals led to debates about whether or not earlier models developed for metallic polycrystals can apply to these systems. In particular, all existing models require some mobility of lattice or grain-boundary dislocations whereas such activity is not observed in most ceramic systems. A model is presented that accounts for the occurrence of superplasticity in the absence of dislocation motion. It is based on a mechanism of grain-boundary sliding by pure-shear motion under stationary conditions, which is accommodated by lattice or grain-boundary diffusion. The prediction of this model regarding the temperature dependences of the stress exponent and of the effective activation energy are found in agreement with experimental results and literature data on five ceramic systems where dislocation activity could not be recorded: -SiAlON polycrystals, Al-doped SiC polycrystals, nanocrystalline MgO, yttria-tetragonal zirconia polycrystals, and alumina ceramics polycrystalses
dc.formatapplication/pdfes
dc.language.isoenges
dc.relation.ispartofPhysical Review B. Condensed mather and materials, 80, 214107/1-214107/8es
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleDiffusion-driven superplasticity in ceramics: Modeling and comparison with available dataes
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Física de la Materia Condensadaes
dc.relation.publisherversionhttp://doi.org/10.1103/PhysRevB.80.214107es
dc.relation.publisherversionhttp://dx.doi.org/10.1103/PhysRevB.80.214107
dc.identifier.doi10.1103/PhysRevB.80.214107
dc.identifier.idushttps://idus.us.es/xmlui/handle/11441/25492

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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as: Attribution-NonCommercial-NoDerivatives 4.0 Internacional