Influence of multiwall carbon nanotubes on the structural and morphological features of Si-C-O ceramics derived from a hybrid polymeric precursor

dc.creatorSegatelli, MG
dc.creatorRadovanovic, E
dc.creatorPires, ATN
dc.creatorGoncalves, MD
dc.creatorYoshida, IVP
dc.date2010
dc.dateDEC 1
dc.date2014-11-15T06:10:42Z
dc.date2015-11-26T17:18:43Z
dc.date2014-11-15T06:10:42Z
dc.date2015-11-26T17:18:43Z
dc.date.accessioned2018-03-29T00:06:24Z
dc.date.available2018-03-29T00:06:24Z
dc.identifierMaterials Chemistry And Physics. Elsevier Science Sa, v. 124, n. 41700, n. 1216, n. 1224, 2010.
dc.identifier0254-0584
dc.identifierWOS:000284434100057
dc.identifier10.1016/j.matchemphys.2010.08.061
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/80220
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/80220
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/80220
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1282725
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThis study describes the effect of multiwall carbon nanotubes MWCNT as an additional C-source on the structural and morphological features of silicon oxycarbide ceramics obtained by different heat treatment times of a hybrid polymeric precursor at 1500 degrees C under an Ar atmosphere The precursor was prepared by a hydrosilylation reaction from poly(methylsiloxane) and divinylbenzene The presence of MWCNT promoted a more effective crystallization of the SIC and c-SiO(2) phases in the resulting ceramics in comparison with those without MWCNT The heat treatment time at 1500 degrees C also affects the crystallization of the ceramic product In addition an Increase of the defect density in the Csp(2) sheets of the C(free) dispersed phase together with higher disordering of this phase were observed in the ceramics obtained from MWCNT-containing precursor The presence of MWCNT resulted in a ceramic matrix with a different morphology in relation to that observed in the absence of MWCNT with lower resistance to oxidation Moreover the extra C-source present in the ceramic matrix introduced as MWCNT reduced the solubility of SiO(2) in this matrix promoting the early segregation of SiO(4)-rich sites Consequently a more effective crystallization of SiO(2) with relatively large c-SiO(2) crystals and of beta-SiC occurred in the material with the increase of the heat treatment time (C) 2010 Elsevier B V All rights reserved
dc.description124
dc.description41700
dc.description1216
dc.description1224
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFAPESP [05/58460-0, 03/09926-1]
dc.descriptionCNPq [305916/2006-8]
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationMaterials Chemistry And Physics
dc.relationMater. Chem. Phys.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectCeramics
dc.subjectHeat treatment
dc.subjectElectron microscopy
dc.subjectNucleation
dc.subjectSilicon Oxycarbide Glasses
dc.subjectEnergy-loss Spectroscopy
dc.subjectTransmission Electron-microscopy
dc.subjectHigh-temperature Behavior
dc.subjectPolysiloxane
dc.subjectPhase
dc.subjectComposites
dc.subjectPyrolysis
dc.subjectOxidation
dc.subjectCarbide
dc.titleInfluence of multiwall carbon nanotubes on the structural and morphological features of Si-C-O ceramics derived from a hybrid polymeric precursor
dc.typeArtículos de revistas


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