Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia

Detalhes bibliográficos
Autor(a) principal: Almeida,Daniel Soares de
Data de Publicação: 2010
Outros Autores: Cairo,Carlos Alberto Alves, Silva,Cosme Roberto M., Nono,Maria do Carmo A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of Aerospace Technology and Management (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462010000200195
Resumo: Abstract: The most usual ceramic material for coating turbine blades is yttria doped zirconia. Addition of niobia, as a co-dopant in the Y2O3-ZrO2 system, can reduce the thermal conductivity and improve mechanical properties of the coating. The purpose of this work was to evaluate the influence of the addition of niobia on the microstructure and thermal properties of the ceramic coatings. SEM on coatings fractured cross-section shows a columnar structure and the results of XRD show only zirconia tetragonal phase in the ceramic coating for the chemical composition range studied. As the difference NbO2,5-YO1,5 mol percent increases, the tetragonality increases. A significant reduction of the thermal conductivity, measured by laser flash technique in the zirconia coating co-doped with yttria and niobia when compared with zirconia-yttria coating was observed.
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spelling Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobiaTBCEB-PVDZirconiaNiobiaThermal conductivityAbstract: The most usual ceramic material for coating turbine blades is yttria doped zirconia. Addition of niobia, as a co-dopant in the Y2O3-ZrO2 system, can reduce the thermal conductivity and improve mechanical properties of the coating. The purpose of this work was to evaluate the influence of the addition of niobia on the microstructure and thermal properties of the ceramic coatings. SEM on coatings fractured cross-section shows a columnar structure and the results of XRD show only zirconia tetragonal phase in the ceramic coating for the chemical composition range studied. As the difference NbO2,5-YO1,5 mol percent increases, the tetragonality increases. A significant reduction of the thermal conductivity, measured by laser flash technique in the zirconia coating co-doped with yttria and niobia when compared with zirconia-yttria coating was observed.Departamento de Ciência e Tecnologia Aeroespacial2010-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462010000200195Journal of Aerospace Technology and Management v.2 n.2 2010reponame:Journal of Aerospace Technology and Management (Online)instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA)instacron:DCTA10.5028/jatm.2010.02026910info:eu-repo/semantics/openAccessAlmeida,Daniel Soares deCairo,Carlos Alberto AlvesSilva,Cosme Roberto M.Nono,Maria do Carmo A.eng2017-05-25T00:00:00Zoai:scielo:S2175-91462010000200195Revistahttp://www.jatm.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||secretary@jatm.com.br2175-91461984-9648opendoar:2017-05-25T00:00Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA)false
dc.title.none.fl_str_mv Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
title Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
spellingShingle Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
Almeida,Daniel Soares de
TBC
EB-PVD
Zirconia
Niobia
Thermal conductivity
title_short Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
title_full Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
title_fullStr Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
title_full_unstemmed Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
title_sort Thermal barrier coating by electron beam-physical vapor deposition of zirconia co-doped with yttria and niobia
author Almeida,Daniel Soares de
author_facet Almeida,Daniel Soares de
Cairo,Carlos Alberto Alves
Silva,Cosme Roberto M.
Nono,Maria do Carmo A.
author_role author
author2 Cairo,Carlos Alberto Alves
Silva,Cosme Roberto M.
Nono,Maria do Carmo A.
author2_role author
author
author
dc.contributor.author.fl_str_mv Almeida,Daniel Soares de
Cairo,Carlos Alberto Alves
Silva,Cosme Roberto M.
Nono,Maria do Carmo A.
dc.subject.por.fl_str_mv TBC
EB-PVD
Zirconia
Niobia
Thermal conductivity
topic TBC
EB-PVD
Zirconia
Niobia
Thermal conductivity
description Abstract: The most usual ceramic material for coating turbine blades is yttria doped zirconia. Addition of niobia, as a co-dopant in the Y2O3-ZrO2 system, can reduce the thermal conductivity and improve mechanical properties of the coating. The purpose of this work was to evaluate the influence of the addition of niobia on the microstructure and thermal properties of the ceramic coatings. SEM on coatings fractured cross-section shows a columnar structure and the results of XRD show only zirconia tetragonal phase in the ceramic coating for the chemical composition range studied. As the difference NbO2,5-YO1,5 mol percent increases, the tetragonality increases. A significant reduction of the thermal conductivity, measured by laser flash technique in the zirconia coating co-doped with yttria and niobia when compared with zirconia-yttria coating was observed.
publishDate 2010
dc.date.none.fl_str_mv 2010-08-01
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=S2175-91462010000200195
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462010000200195
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.5028/jatm.2010.02026910
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 Departamento de Ciência e Tecnologia Aeroespacial
publisher.none.fl_str_mv Departamento de Ciência e Tecnologia Aeroespacial
dc.source.none.fl_str_mv Journal of Aerospace Technology and Management v.2 n.2 2010
reponame:Journal of Aerospace Technology and Management (Online)
instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA)
instacron:DCTA
instname_str Departamento de Ciência e Tecnologia Aeroespacial (DCTA)
instacron_str DCTA
institution DCTA
reponame_str Journal of Aerospace Technology and Management (Online)
collection Journal of Aerospace Technology and Management (Online)
repository.name.fl_str_mv Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA)
repository.mail.fl_str_mv ||secretary@jatm.com.br
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