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Hydrothermal sintering for densification of silica. Evidence for the role of water

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorNDAYISHIMIYE, Arnaud
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLARGETEAU, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMORNET, Stéphane
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUTTINE, Mathieu
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorDOURGES, Marie-Anne
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDENUX, Dominique
hal.structure.identifierScience et Ingénierie des Matériaux et Procédés [SIMaP ]
dc.contributor.authorVERDIER, Marc
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGOUNÉ, Mohamed
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorHÉRISSON DE BEAUVOIR, Thomas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorELISSALDE, Catherine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGOGLIO, Graziella
dc.date.issued2018
dc.identifier.issn0955-2219
dc.description.abstractEnWe present hydrothermal sintering as a smart route to densify ceramics at low temperature. Home-made silica nanoparticles naturally hydrated, partially and quasi-fully dehydrated were submitted to hydrothermal sintering (190 MPa, 300 °C, 90 min) without additional water. Their morphology and surface chemistry strongly influence their packing and then the mechanical-chemical effects responsible for densification involving dissolution-precipitation mechanisms. The connection between the porosity and the starting compact packing was pointed out. Moreover, the influence of additional chemical effects was highlighted as the polycondensation of protruding silanols favors the formation of interparticle necks via the creation of polysiloxane bonds. When external water is added, the filling of the mesopores is nearly fully achieved but large residual macropores initiated in the early stage of sintering are remaining. The compactness of the as-obtained ceramic is 73.6%. We also demonstrate the influence of water on the mechanical and deformation behavior of the samples.
dc.language.isoen
dc.publisherElsevier
dc.subject.enHydrothermal sintering
dc.subject.enSilica
dc.subject.enCeramics
dc.subject.enLow temperature processing densification
dc.subject.enMechanical-chemical effects
dc.subject.enPolycondensation
dc.title.enHydrothermal sintering for densification of silica. Evidence for the role of water
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jeurceramsoc.2017.10.011
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of the European Ceramic Society
bordeaux.page1860-1870
bordeaux.volume38
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01708843
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01708843v1
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