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Mechanisms and energetics in the early stages of solvent-assisted low-temperature sintering of ZnO

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVILLATTE, Lucas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorRUA-TABORDA, Maria-Isabel
hal.structure.identifierMaterials Research Institute
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorNDAYISHIMIYE, Arnaud
hal.structure.identifierMaterials Research Institute
hal.structure.identifierDepartment of Materials Science and Engineering
dc.contributor.authorRANDALL, Clive
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.authorGOGLIO, Graziella
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorELISSALDE, Catherine
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorBORDÈRE, Sylvie
dc.date.issued2022
dc.identifier.issn2589-1529
dc.description.abstractEnThe Hydro/Solvothermal Sintering (HSS) is a technique enabling the low temperature sintering of ceramics and composites, by using a solvent and uniaxial pressure. This energy-efficient technique also opens new perspectives in designing new composites with tailored functional properties. While the solvent plays a key role in reducing the sintering temperature, the modelling and deep understanding of sintering mechanisms remain an open field of investigation. This study unveils the energetics and mechanisms involved in the first stage of HSS. The strategy highlighted in this paper includes: i) the building of a hydrothermal sintering device equipped with a dilatometer to monitor the shrinkage in situ, ii) numerical stress calculations at the contact between particles to show the suitability of the two-particle kinetic equation, and iii) the use of anisothermal and non-conventional stepwise isothermal methodologies for the investigation of mechanisms and energetics. The model material, ZnO, was densified to high relative densities with acetic acid as a solvent, and a pressure p. 2 and temperature of 320 MPa and 150 °C, respectively. With these experimental conditions, the kinetic analysis obtained from the two methodologies is consistent and implies a dissolution reaction of the material as the rate controlling mechanism with possible coupling to grain boundary sliding. The activation energy of 90 kJ.mol-1 is determined with the different analysis methodologies. The interest of the stepwise isothermal methodology in obtaining accurate activation energy is also discussed.
dc.description.sponsorshipLe frittage hydrothermal : un procédé basse température pour la densification de céramiques - ANR-18-CE08-0006
dc.language.isoen
dc.publisherElsevier
dc.subject.enhydrothermal sintering
dc.subject.enmodelling
dc.subject.enkinetics analysis
dc.subject.enmechanism
dc.subject.enstepwise isothermal densification approach
dc.subject.enzinc oxide
dc.title.enMechanisms and energetics in the early stages of solvent-assisted low-temperature sintering of ZnO
dc.typeArticle de revue
dc.identifier.doi10.1016/j.mtla.2022.101418
dc.subject.halChimie/Matériaux
bordeaux.journalMaterialia
bordeaux.page101417
bordeaux.volume22
bordeaux.peerReviewedoui
hal.identifierhal-03673069
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03673069v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Materialia&rft.date=2022&rft.volume=22&rft.spage=101417&rft.epage=101417&rft.eissn=2589-1529&rft.issn=2589-1529&rft.au=VILLATTE,%20Lucas&RUA-TABORDA,%20Maria-Isabel&NDAYISHIMIYE,%20Arnaud&RANDALL,%20Clive&LARGETEAU,%20Alain&rft.genre=article


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