Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor

Detalhes bibliográficos
Autor(a) principal: Acchar,Wilson
Data de Publicação: 2006
Outros Autores: Silva,José Roberto Bezerra da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300005
Resumo: Active filler controlled pyrolysis of polymers (AFCOP) is a recent method for obtaining near-net shaped ceramic bodies. Alumina based composites have been developed for use as cutting tools, so knowledge of the surface composition is extremely important because it is directly related to the hardness and wear resistance Samples containing a fixed concentration of 60 wt. (%) of polysiloxane and a mixture of metallic niobium and alumina powder were homogenized, uniaxially warm pressed at 80 °C and subsequently pyrolyzed in flowing argon at 1200, 1400 and 1500 °C. Analysis of the surface composition was carried out by X ray photoelectron spectroscopy, infrared spectroscopy, X ray diffraction and scanning electron microscopy. The results have indicated that the formation of the phases on the surface depends strongly on the niobium/carbon ratio in the raw materials.
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spelling Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursoraluminaniobium carbideX ray photoelectron spectroscopyActive filler controlled pyrolysis of polymers (AFCOP) is a recent method for obtaining near-net shaped ceramic bodies. Alumina based composites have been developed for use as cutting tools, so knowledge of the surface composition is extremely important because it is directly related to the hardness and wear resistance Samples containing a fixed concentration of 60 wt. (%) of polysiloxane and a mixture of metallic niobium and alumina powder were homogenized, uniaxially warm pressed at 80 °C and subsequently pyrolyzed in flowing argon at 1200, 1400 and 1500 °C. Analysis of the surface composition was carried out by X ray photoelectron spectroscopy, infrared spectroscopy, X ray diffraction and scanning electron microscopy. The results have indicated that the formation of the phases on the surface depends strongly on the niobium/carbon ratio in the raw materials.ABM, ABC, ABPol2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300005Materials Research v.9 n.3 2006reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392006000300005info:eu-repo/semantics/openAccessAcchar,WilsonSilva,José Roberto Bezerra daeng2006-10-19T00:00:00Zoai:scielo:S1516-14392006000300005Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-10-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
title Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
spellingShingle Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
Acchar,Wilson
alumina
niobium carbide
X ray photoelectron spectroscopy
title_short Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
title_full Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
title_fullStr Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
title_full_unstemmed Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
title_sort Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
author Acchar,Wilson
author_facet Acchar,Wilson
Silva,José Roberto Bezerra da
author_role author
author2 Silva,José Roberto Bezerra da
author2_role author
dc.contributor.author.fl_str_mv Acchar,Wilson
Silva,José Roberto Bezerra da
dc.subject.por.fl_str_mv alumina
niobium carbide
X ray photoelectron spectroscopy
topic alumina
niobium carbide
X ray photoelectron spectroscopy
description Active filler controlled pyrolysis of polymers (AFCOP) is a recent method for obtaining near-net shaped ceramic bodies. Alumina based composites have been developed for use as cutting tools, so knowledge of the surface composition is extremely important because it is directly related to the hardness and wear resistance Samples containing a fixed concentration of 60 wt. (%) of polysiloxane and a mixture of metallic niobium and alumina powder were homogenized, uniaxially warm pressed at 80 °C and subsequently pyrolyzed in flowing argon at 1200, 1400 and 1500 °C. Analysis of the surface composition was carried out by X ray photoelectron spectroscopy, infrared spectroscopy, X ray diffraction and scanning electron microscopy. The results have indicated that the formation of the phases on the surface depends strongly on the niobium/carbon ratio in the raw materials.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392006000300005
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.9 n.3 2006
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
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