Thermochemical stability of zirconia-titanium nitride as mixed ionic-electronic composites

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dc.contributor.authorSILVA, P.S.M.
dc.contributor.authorESPOSITO, V.
dc.contributor.authorMARANI, D.
dc.contributor.authorFLORIO, D.Z. de
dc.contributor.authorMACHADO, I.F.
dc.contributor.authorFONSECA, F.C.
dc.coverageInternacionalpt_BR
dc.date.accessioned2018-07-31T16:34:13Z
dc.date.available2018-07-31T16:34:13Z
dc.date.issued2018pt_BR
dc.description.abstractDense zirconia (8% molar yttria-stabilized ZrO2)-titanium nitride (TiN) composites are fabricated to obtain mixed ionic-electronic conducting ceramic systems with high degree of electronic and thermal conductivity. The composites are consolidated by spark plasma sintering (SPS), starting from pure powders of the pristine phases mixed in different ratios (TiN = 25, 50, 75 wt%). A careful optimization of the SPS conditions allows producing highly dense samples with no reaction between the phases or degradation by oxidation, thus maintaining the chemical integrity of the two phases. For all the composites, high electrical conductivity is attained. Samples exhibit metallic behavior, showing an unexpected percolation of TiN in the YSZ matrix for volume fraction ≤ 25 wt% (27 vol%). Chemical degradation and electrical properties of the compounds were monitored under oxidative (air) and inert (Ar) atmosphere at high temperatures. The oxidation kinetics of the nitride phase was inhibited by the microstructure of the composite. The electrical properties of such composites were explored at high temperature to evaluate its application in electrochemical devices. As results, it is shown that electrical transport properties of the composite can be tuned by both the relative volume fraction of phases and controlled oxidative treatments. Adjusting such parameters different electric behaviors were observed ranging from predominant electronic conductors, to temperature-independent resistivity, and semiconducting.pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipIDCNPq: 447813/2014-5; 401218/2014-7pt_BR
dc.description.sponsorshipIDFAPESP: 15/20434-0; 14/09087-4; 14/50279-4pt_BR
dc.format.extent8440-8446pt_BR
dc.identifier.citationSILVA, P.S.M.; ESPOSITO, V.; MARANI, D.; FLORIO, D.Z. de; MACHADO, I.F.; FONSECA, F.C. Thermochemical stability of zirconia-titanium nitride as mixed ionic-electronic composites. <b>Ceramics International</b>, v. 44, n. 7, p. 8440-8446, 2018. DOI: <a href="https://dx.doi.org/10.1016/j.ceramint.2018.02.039">10.1016/j.ceramint.2018.02.039</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29008.
dc.identifier.doi10.1016/j.ceramint.2018.02.039pt_BR
dc.identifier.fasciculo7pt_BR
dc.identifier.issn0272-8842pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0708-2021
dc.identifier.percentilfi94.64en
dc.identifier.percentilfiCiteScore82.40
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29008
dc.identifier.vol44pt_BR
dc.relation.ispartofCeramics Internationalpt_BR
dc.rightsopenAccesspt_BR
dc.subjectthermochemical processes
dc.subjectcomposite materials
dc.subjectzirconium oxides
dc.subjecttitanium nitrides
dc.subjectyttrium oxides
dc.subjectplasma
dc.subjectelectric conductivity
dc.subjectceramics
dc.titleThermochemical stability of zirconia-titanium nitride as mixed ionic-electronic compositespt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorFABIO CORAL FONSECA
ipen.autorPAULO SERGIO MARTINS DA SILVA
ipen.codigoautor943
ipen.codigoautor11424
ipen.contributor.ipenauthorFABIO CORAL FONSECA
ipen.contributor.ipenauthorPAULO SERGIO MARTINS DA SILVA
ipen.date.recebimento18-07pt_BR
ipen.identifier.fi3.450pt_BR
ipen.identifier.fiCiteScore5.2
ipen.identifier.ipendoc24797pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi3.000 - 4.499
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublicationaa9a4b52-270e-4ea4-a566-a1107da1e0cf
relation.isAuthorOfPublication5c6d762b-7c33-450a-b32a-3b4537a961d7
relation.isAuthorOfPublication.latestForDiscovery5c6d762b-7c33-450a-b32a-3b4537a961d7
sigepi.autor.atividadeFONSECA, F.C.:943:610:Npt_BR
sigepi.autor.atividadeSILVA, P.S.M.:11424:610:S
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