Sintering mechanisms of ZrO2 center dot MgO with addition of TiO2 and CuO

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dc.contributor.authorNasar, R. S.
dc.contributor.authorCerqueira, M.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.institutionUniversidade Federal do Rio Grande do Norte (UFRN)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:22:47Z
dc.date.available2014-05-20T15:22:47Z
dc.date.issued2004-01-01
dc.description.abstractSubstitutions of Ti and Cu in ZrO2.MgO (Z), cause transformation from monoclinic (m) to cubic (c) and tetragonal (t). According to the vacancy model and solid Solution formation models, neither CuO nor TiO2 cause zirconia stabilization, which derives front other phenomena. Data analysis by TMA using the CRH (constant rate of heating) method shows a solid state reaction of ZrO2.MgO.TiO2 (Z.TiO2) demonstrating a dominant mechanism of volume diffusion (n = 1). However, the sintering of ZrO2.MgO.CuO (Z.CuO) shows a viscous flow mechanism (n = 0), a similar phenomena to that of by sintering of glass. Transformations, such as: CuO to Cu2O at 1000 degreesC, ZrO2 (m) to ZrO2 (t) at 1100 degreesC and Cu2O (s) to Cu2O (l) at 1230 degreesC cause successive rearrangements of microstructure inside of region I (sintering process) and lead to interpretation errors when the Bannister equation is used. (C) 2003 Elsevier Ltd and Techna Group S.r.l. All rights reserved.en
dc.description.affiliationUniv Fed Rio Grande Norte, Dept Quim, BR-59072970 Natal, RN, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.format.extent571-577
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2003.08.005
dc.identifier.citationCeramics International. Oxford: Elsevier B.V., v. 30, n. 4, p. 571-577, 2004.
dc.identifier.doi10.1016/j.ceramint.2003.08.005
dc.identifier.issn0272-8842
dc.identifier.urihttp://hdl.handle.net/11449/33699
dc.identifier.wosWOS:000221573100011
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofCeramics International
dc.relation.ispartofjcr3.057
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectsinteringpt
dc.subjectZrO2pt
dc.subjectMgOpt
dc.subjectzirconia stabilizationpt
dc.titleSintering mechanisms of ZrO2 center dot MgO with addition of TiO2 and CuOen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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