Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites

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dc.contributor.authorArdila Rodriguez, Laura Angelica [UNIFESP]
dc.contributor.authorTravessa, Dilermando Nagle [UNIFESP]
dc.coverageLondon
dc.date.accessioned2020-07-02T18:52:09Z
dc.date.available2020-07-02T18:52:09Z
dc.date.issued2018
dc.description.abstractThe production of metal matrix composites with elevated mechanical properties depends largely on the reinforcing phase properties. Due to the poor oxidation resistance of multiwalled carbon nanotubes (MWCNTs) as well as their high reactivity with molten metal, the processing conditions for the production of MWCNT-reinforced metal matrix composites may be an obstacle to their successful use as reinforcement. Coating MWCNTs with a ceramic material that acts as a thermal protection would be an alternative to improve oxidation stability. In this work, MWCNTs previously functionalized were coated with titanium dioxide (TiO2) layers of different thicknesses, producing a core-shell structure. Heat treatments at three different temperatures (500 degrees C, 750 degrees C, and 1000 degrees C) were performed on coated nanotubes in order to form a stable metal oxidestructure. The MWCNT/TiO2 hybrids produced were evaluated in terms of thermal stability., ermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and X-ray photoelectron spectroscopy (XPS) were performed in order to investigate TiO2-coated MWCNT structure and thermal stability under oxidative atmosphere. It was found that the thermal stability of the TiO2-coated MWCNTs was dependent of the TiO2 layer morphology that in turn depends on the heat treatment temperature.en
dc.description.affiliationFed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Lab Adv Met & Proc, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUnifespFed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Lab Adv Met & Proc, Sao Jose Dos Campos, SP, Brazil
dc.description.provenanceMade available in DSpace on 2020-07-02T18:52:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2018en
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIDCNPq: 443395/2014-4
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1155/2018/7026141
dc.identifier.citationAdvances In Materials Science And Engineering. London, v. , p. -, 2018.
dc.identifier.doi10.1155/2018/7026141
dc.identifier.fileWOS000423075500001.pdf
dc.identifier.issn1687-8434
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/53909
dc.identifier.wosWOS:000423075500001
dc.language.isoeng
dc.publisherHindawi Ltd
dc.relation.ispartofAdvances In Materials Science And Engineering
dc.rightsAcesso aberto
dc.titleCore/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Compositesen
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