Microstructure evolution of yttria compacts by powder technology

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dc.contributor.authorSANTOS, SILAS C.pt_BR
dc.contributor.authorRODRIGUES JUNIOR, ORLANDOpt_BR
dc.contributor.authorCAMPOS, LETICIApt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2022-03-16T18:52:02Z
dc.date.available2022-03-16T18:52:02Z
dc.date.issued2021pt_BR
dc.description.abstractBackground: Innovation in ceramic materials relies on the processing of powders. Yttria, also known as yttrium oxide, belongs to the rare-earth group (RE2O3 - RE from La to Lu, including Sc and Y). Due to the great properties and end-use of RE-based materials since agriculture until astronomy, studies on processing, sintering and microstructural evolution of RE-based materials are essential to provide new materials with improved characteristics. The aim of this paper is to obtain dense compacts of yttria by powder technology, in which the effect of sintering temperature on sample's microstructure is evaluated. Methods: Yttria powders (Y2O3) were characterized by Photon Correlation Spectroscopy (PCS), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Cylindrical powder compacts were produced by uniaxial compaction, followed by hydrostatic compaction. Sintered samples obtained under sintering temperatures from 1350 to 1550ºC were evaluated by SEM, XRD, apparent density, and true density. Results: Cubic C-type yttria powders exhibited a mean particle size (d50) of 1.6μm, and morphology like acicular. Powder compacts (diameter x height) of 9.57mm ± 0.01 x 1.53mm ± 0.01 presented mean apparent density of 53.69% (based on free powder density). Sintered samples at 1550ºC exhibited the most densification, 65.0% related to the green density and 91.0% related to theoretical density, respectively. Conclusion: Yttria cylindrical compacts with dense microstructure, and symmetric dimensions were formed by powder technology from powders with a mean particle size of 6.51μm, by compaction methods (uniaxial and hydrostatic), followed by sintering. The most densification of samples was achieved by the sintering condition of 1550ºC for 2h, providing samples with a theoretical density of 91%. These results provide useful subsidies to advance toward full densification of yttria-based materials.pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipIDFAPESP: 18/05982-0pt_BR
dc.description.sponsorshipIDCNPq: 426513/2018-5pt_BR
dc.format.extent122-128pt_BR
dc.identifier.citationSANTOS, SILAS C.; RODRIGUES JUNIOR, ORLANDO; CAMPOS, LETICIA. Microstructure evolution of yttria compacts by powder technology. <b>Current Smart Materials</b>, v. 5, n. 2, p. 122-128, 2021. DOI: <a href="https://dx.doi.org/10.2174/2405465805666210120102315">10.2174/2405465805666210120102315</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/32800.
dc.identifier.doi10.2174/2405465805666210120102315pt_BR
dc.identifier.fasciculo2pt_BR
dc.identifier.issn2405-4658pt_BR
dc.identifier.orcid0000-0001-7137-0613pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7137-0613
dc.identifier.orcidhttps://orcid.org/0000-0002-6704-1910
dc.identifier.percentilfiSem Percentilpt_BR
dc.identifier.percentilfiCiteScoreSem Percentil CiteScorept_BR
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/32800
dc.identifier.vol5pt_BR
dc.relation.ispartofCurrent Smart Materialspt_BR
dc.rightsclosedAccesspt_BR
dc.subjectmicrostructure
dc.subjectyttrium
dc.subjectrare earths
dc.subjectsintering
dc.subjectpowders
dc.subjectphotons
dc.subjectcorrelations
dc.titleMicrostructure evolution of yttria compacts by powder technologypt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorLETICIA LUCENTE CAMPOS RODRIGUES
ipen.autorORLANDO RODRIGUES JUNIOR
ipen.autorSILAS CARDOSO DOS SANTOS
ipen.codigoautor1195
ipen.codigoautor322
ipen.codigoautor6961
ipen.contributor.ipenauthorLETICIA LUCENTE CAMPOS RODRIGUES
ipen.contributor.ipenauthorORLANDO RODRIGUES JUNIOR
ipen.contributor.ipenauthorSILAS CARDOSO DOS SANTOS
ipen.date.recebimento22-03
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.fiCiteScoreSem CiteScorept_BR
ipen.identifier.ipendoc28522pt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationd4d34119-a6e6-4026-9a67-7b16d8b668da
relation.isAuthorOfPublicationf72d59d1-f942-442a-b16e-8b0ba0e2b671
relation.isAuthorOfPublication6d1f35e3-57eb-471d-ae82-5f850a99e01b
relation.isAuthorOfPublication.latestForDiscovery6d1f35e3-57eb-471d-ae82-5f850a99e01b
sigepi.autor.atividadeCAMPOS, LETICIA:1195:330:Npt_BR
sigepi.autor.atividadeRODRIGUES JUNIOR, ORLANDO:322:330:Npt_BR
sigepi.autor.atividadeSANTOS, SILAS C.:6961:330:Spt_BR
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