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From freeze-dried precursors to microwave sintered Al2O3-ZrO2 composites

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From freeze-dried precursors to microwave sintered Al2O3-ZrO2 composites

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dc.contributor.author Borrell Tomás, María Amparo es_ES
dc.contributor.author Gil-Flores, Lorena es_ES
dc.contributor.author Guillén-Pineda, René Miguel es_ES
dc.contributor.author Salvador Moya, Mª Dolores es_ES
dc.date.accessioned 2020-05-04T06:28:04Z
dc.date.available 2020-05-04T06:28:04Z
dc.date.issued 2019 es_ES
dc.identifier.issn 1820-6131 es_ES
dc.identifier.uri http://hdl.handle.net/10251/142157
dc.description.abstract [EN] Homogeneous Al2O3-Zr0.91Y0.09O1.955 (65-35 mol%) nanopowders have been prepared in a wide temperature range (from 1073 to 1573 K) by thermal decomposition of amorphous precursors, made previously by freeze-drying of appropriate solutions in air Electron microscopy images show that, whereas at low temperatures (973 K) pseudo-spherical particles constituted of Al2O3 and Zr0.91Y0.09O1.955 grains are observed (similar to 38nm), at high temperatures (1573 K) a homogeneous dispersion of nanocrystalline ZrO2-based grains (similar to 186 nm) is dispersed in the sintered Al2O3 matrix. The comparison between phase and microstructure evolution in these samples clearly indicates that the disorder at the atomic scale in the precursor makes the attainment of higher temperatures necessary for nucleation and growth of both phases. Finally, a selected material was sintered in a mono-mode microwave device at 2.45 GHz in air at 1573 and 1673 K. This fast-microwave technology allows fabrication of composites with high densities (similar to 99% TD) and excellent mechanical properties, such as hardness and Young's modulus reaching 25.6 GPa and 358 GPa, respectively. es_ES
dc.description.sponsorship The authors would like to thank to the Generalitat Valenciana for financial support received for the project PROMETEO/2016/040 and Santiago Grisolia program scholarship (GRISOLIAP/2018/168). A. Borrell acknowledges the Spanish Ministry of Economy and Competitiveness for her RyC contract (RYC-2016-20915). es_ES
dc.language Inglés es_ES
dc.publisher University of Novi Sad es_ES
dc.relation GENERALITAT VALENCIANA/PROMETEO/2016/040 es_ES
dc.relation AGENCIA ESTATAL DE INVESTIGACION/RYC-2016-20915 es_ES
dc.relation GENERALITAT VALENCIANA/GRISOLIAP/2018/168 es_ES
dc.relation.ispartof Processing and Application of Ceramics es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Ceramic composites es_ES
dc.subject Freeze-drying es_ES
dc.subject Microwave sintering es_ES
dc.subject Microstructure es_ES
dc.subject Mechanical properties es_ES
dc.subject.classification CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA es_ES
dc.title From freeze-dried precursors to microwave sintered Al2O3-ZrO2 composites es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.2298/PAC1902157B es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials es_ES
dc.description.bibliographicCitation Borrell Tomás, MA.; Gil-Flores, L.; Guillén-Pineda, RM.; Salvador Moya, MD. (2019). From freeze-dried precursors to microwave sintered Al2O3-ZrO2 composites. Processing and Application of Ceramics. 13(2):157-163. https://doi.org/10.2298/PAC1902157B es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.2298/PAC1902157B es_ES
dc.description.upvformatpinicio 157 es_ES
dc.description.upvformatpfin 163 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 13 es_ES
dc.description.issue 2 es_ES
dc.relation.pasarela S\395757 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Agencia Estatal de Investigación es_ES


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