Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | https://repositorio.unifesp.br/handle/11600/53909 http://dx.doi.org/10.1155/2018/7026141 |
Resumo: | The 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. |
id |
UFSP_2759bdc2755d2c34f7808350e0f98af0 |
---|---|
oai_identifier_str |
oai:repositorio.unifesp.br:11600/53909 |
network_acronym_str |
UFSP |
network_name_str |
Repositório Institucional da UNIFESP |
repository_id_str |
3465 |
spelling |
Ardila Rodriguez, Laura Angelica [UNIFESP]Travessa, Dilermando Nagle [UNIFESP]2020-07-02T18:52:09Z2020-07-02T18:52:09Z2018Advances In Materials Science And Engineering. London, v. , p. -, 2018.1687-8434https://repositorio.unifesp.br/handle/11600/53909http://dx.doi.org/10.1155/2018/7026141WOS000423075500001.pdf10.1155/2018/7026141WOS:000423075500001The 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.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Lab Adv Met & Proc, Sao Jose Dos Campos, SP, BrazilFed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Lab Adv Met & Proc, Sao Jose Dos Campos, SP, BrazilCNPq: 443395/2014-4Web of Science-engHindawi LtdAdvances In Materials Science And EngineeringCore/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Compositesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleLondoninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALWOS000423075500001.pdfWOS000423075500001.pdfapplication/pdf2622962${dspace.ui.url}/bitstream/11600/53909/1/WOS000423075500001.pdf3c424a08fbf06bdef7dfa8bcbf8c49b2MD51open accessTEXTWOS000423075500001.pdf.txtWOS000423075500001.pdf.txtExtracted texttext/plain49716${dspace.ui.url}/bitstream/11600/53909/8/WOS000423075500001.pdf.txtec3dd3f1b3c10079eb24f813d4c29b41MD58open accessTHUMBNAILWOS000423075500001.pdf.jpgWOS000423075500001.pdf.jpgIM Thumbnailimage/jpeg6596${dspace.ui.url}/bitstream/11600/53909/10/WOS000423075500001.pdf.jpg2e5c577f18ce1680ab417a96b1f792e2MD510open access11600/539092023-06-05 19:06:20.562open accessoai:repositorio.unifesp.br:11600/53909Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:06:20Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.fl_str_mv |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
title |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
spellingShingle |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites Ardila Rodriguez, Laura Angelica [UNIFESP] |
title_short |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
title_full |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
title_fullStr |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
title_full_unstemmed |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
title_sort |
Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites |
author |
Ardila Rodriguez, Laura Angelica [UNIFESP] |
author_facet |
Ardila Rodriguez, Laura Angelica [UNIFESP] Travessa, Dilermando Nagle [UNIFESP] |
author_role |
author |
author2 |
Travessa, Dilermando Nagle [UNIFESP] |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Ardila Rodriguez, Laura Angelica [UNIFESP] Travessa, Dilermando Nagle [UNIFESP] |
description |
The 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. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018 |
dc.date.accessioned.fl_str_mv |
2020-07-02T18:52:09Z |
dc.date.available.fl_str_mv |
2020-07-02T18:52:09Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
Advances In Materials Science And Engineering. London, v. , p. -, 2018. |
dc.identifier.uri.fl_str_mv |
https://repositorio.unifesp.br/handle/11600/53909 http://dx.doi.org/10.1155/2018/7026141 |
dc.identifier.issn.none.fl_str_mv |
1687-8434 |
dc.identifier.file.none.fl_str_mv |
WOS000423075500001.pdf |
dc.identifier.doi.none.fl_str_mv |
10.1155/2018/7026141 |
dc.identifier.wos.none.fl_str_mv |
WOS:000423075500001 |
identifier_str_mv |
Advances In Materials Science And Engineering. London, v. , p. -, 2018. 1687-8434 WOS000423075500001.pdf 10.1155/2018/7026141 WOS:000423075500001 |
url |
https://repositorio.unifesp.br/handle/11600/53909 http://dx.doi.org/10.1155/2018/7026141 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.none.fl_str_mv |
Advances In Materials Science And Engineering |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
- |
dc.coverage.none.fl_str_mv |
London |
dc.publisher.none.fl_str_mv |
Hindawi Ltd |
publisher.none.fl_str_mv |
Hindawi Ltd |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UNIFESP instname:Universidade Federal de São Paulo (UNIFESP) instacron:UNIFESP |
instname_str |
Universidade Federal de São Paulo (UNIFESP) |
instacron_str |
UNIFESP |
institution |
UNIFESP |
reponame_str |
Repositório Institucional da UNIFESP |
collection |
Repositório Institucional da UNIFESP |
bitstream.url.fl_str_mv |
${dspace.ui.url}/bitstream/11600/53909/1/WOS000423075500001.pdf ${dspace.ui.url}/bitstream/11600/53909/8/WOS000423075500001.pdf.txt ${dspace.ui.url}/bitstream/11600/53909/10/WOS000423075500001.pdf.jpg |
bitstream.checksum.fl_str_mv |
3c424a08fbf06bdef7dfa8bcbf8c49b2 ec3dd3f1b3c10079eb24f813d4c29b41 2e5c577f18ce1680ab417a96b1f792e2 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP) |
repository.mail.fl_str_mv |
|
_version_ |
1802764123217330176 |