The influence of (Ti,W)C and NbC on the mechanical behavior of alumina

Detalhes bibliográficos
Autor(a) principal: Acchar,Wilson
Data de Publicação: 2006
Outros Autores: Cairo,Carlos Alberto
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=S1516-14392006000200011
Resumo: Recent studies published in the literature have focused on reinforcing alumina with different refractory carbides and nitrides in order to improve hardness, fracture toughness and wear resistance. The incorporation of hard particles as WC, (Ti,W)C and NbC on alumina matrix has shown to be a good alternative in improving the mechanical properties of the composite material. The present work reports some preliminary results obtained reinforcing alumina with 20 wt. (%) (Ti,W)C and 10 wt. (%) NbC. Alumina, (Ti,W)C and NbC powders were homogenized and mixed in a planetary ball mill and subsequently hot-pressed at 1650 °C under 20 MPa in flowing argon. Specimens were characterized by Vicker's microhardness (H V), fracture toughness (K IC), X ray diffraction and scanning microscopy. The composite material showed hardness values of 19.5 GPa and fracture toughness values <FONT FACE=Symbol>»</FONT> 5.2 MPa.m½. The high fracture toughness encountered in this work is related to the crack deflection mechanism.
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spelling The influence of (Ti,W)C and NbC on the mechanical behavior of aluminaceramicscomposite materialshardnessfracture toughnessRecent studies published in the literature have focused on reinforcing alumina with different refractory carbides and nitrides in order to improve hardness, fracture toughness and wear resistance. The incorporation of hard particles as WC, (Ti,W)C and NbC on alumina matrix has shown to be a good alternative in improving the mechanical properties of the composite material. The present work reports some preliminary results obtained reinforcing alumina with 20 wt. (%) (Ti,W)C and 10 wt. (%) NbC. Alumina, (Ti,W)C and NbC powders were homogenized and mixed in a planetary ball mill and subsequently hot-pressed at 1650 °C under 20 MPa in flowing argon. Specimens were characterized by Vicker's microhardness (H V), fracture toughness (K IC), X ray diffraction and scanning microscopy. The composite material showed hardness values of 19.5 GPa and fracture toughness values <FONT FACE=Symbol>»</FONT> 5.2 MPa.m½. The high fracture toughness encountered in this work is related to the crack deflection mechanism.ABM, ABC, ABPol2006-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000200011Materials Research v.9 n.2 2006reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392006000200011info:eu-repo/semantics/openAccessAcchar,WilsonCairo,Carlos Albertoeng2006-06-06T00:00:00Zoai:scielo:S1516-14392006000200011Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-06-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
title The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
spellingShingle The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
Acchar,Wilson
ceramics
composite materials
hardness
fracture toughness
title_short The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
title_full The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
title_fullStr The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
title_full_unstemmed The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
title_sort The influence of (Ti,W)C and NbC on the mechanical behavior of alumina
author Acchar,Wilson
author_facet Acchar,Wilson
Cairo,Carlos Alberto
author_role author
author2 Cairo,Carlos Alberto
author2_role author
dc.contributor.author.fl_str_mv Acchar,Wilson
Cairo,Carlos Alberto
dc.subject.por.fl_str_mv ceramics
composite materials
hardness
fracture toughness
topic ceramics
composite materials
hardness
fracture toughness
description Recent studies published in the literature have focused on reinforcing alumina with different refractory carbides and nitrides in order to improve hardness, fracture toughness and wear resistance. The incorporation of hard particles as WC, (Ti,W)C and NbC on alumina matrix has shown to be a good alternative in improving the mechanical properties of the composite material. The present work reports some preliminary results obtained reinforcing alumina with 20 wt. (%) (Ti,W)C and 10 wt. (%) NbC. Alumina, (Ti,W)C and NbC powders were homogenized and mixed in a planetary ball mill and subsequently hot-pressed at 1650 °C under 20 MPa in flowing argon. Specimens were characterized by Vicker's microhardness (H V), fracture toughness (K IC), X ray diffraction and scanning microscopy. The composite material showed hardness values of 19.5 GPa and fracture toughness values <FONT FACE=Symbol>»</FONT> 5.2 MPa.m½. The high fracture toughness encountered in this work is related to the crack deflection mechanism.
publishDate 2006
dc.date.none.fl_str_mv 2006-06-01
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=S1516-14392006000200011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000200011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392006000200011
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.2 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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