Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4028/www.scientific.net/MSF.820.268 http://hdl.handle.net/11449/234162 |
Resumo: | The improvement on the development of porous ceramic materials has leaded to new technologies in thermal insulation, for example, composite materials for better performance of pressure vessels in rocket engines. Within this context, the present work aims to evaluate the ability of a refractory ceramic base alumina/zirconia through the processes of co-precipitation and replica method in an organic fiber template. The green body was burnt-out and sintered at 1200-1600°C to obtain the continuous porous ceramic fibers. In the FEG-SEM analysis, an interconnected porous structure with small grains was observed. The crystalline phases were determined by X-ray diffraction and compared to micro-Raman results regarding the crystalline structure confirms that there present in the material zirconia is composed of more than one phase. Porosity was calculated through a mercury porosimeter as 77.9%, and the Laser Flash method gave a thermal conductivity value of 1.61 K W.m−1 .K−1 for the Al2 O3-ZrO2 fibers. |
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Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 CeramicsAl2O3-ZrO2Porous ceramicReplica methodThermal propertiesThe improvement on the development of porous ceramic materials has leaded to new technologies in thermal insulation, for example, composite materials for better performance of pressure vessels in rocket engines. Within this context, the present work aims to evaluate the ability of a refractory ceramic base alumina/zirconia through the processes of co-precipitation and replica method in an organic fiber template. The green body was burnt-out and sintered at 1200-1600°C to obtain the continuous porous ceramic fibers. In the FEG-SEM analysis, an interconnected porous structure with small grains was observed. The crystalline phases were determined by X-ray diffraction and compared to micro-Raman results regarding the crystalline structure confirms that there present in the material zirconia is composed of more than one phase. Porosity was calculated through a mercury porosimeter as 77.9%, and the Laser Flash method gave a thermal conductivity value of 1.61 K W.m−1 .K−1 for the Al2 O3-ZrO2 fibers.Graduate Program in Science and Materials Engineering Technology Development Center Federal University of Pelotas, RSLaboratory of Biomaterials & Advanced Ceramics Federal University of Rio Grande do Sul, RSInterdisciplinary Laboratory of Ceramic Materials Ponta Grossa State University, PRNational Institute of Science and Technology of Materials in Nanotechnology Paulista State University, SPGlass Department Institute of Glass and CeramicInstitute of Physics and Mathematics Federal University of Pelotas, RSNational Institute of Science and Technology of Materials in Nanotechnology Paulista State University, SPFederal University of PelotasFederal University of Rio Grande do SulPonta Grossa State UniversityUniversidade Estadual Paulista (UNESP)Institute of Glass and CeramicDelbrücke, TiagoGouvêa, Rogério A.Raubach, Cristiane W.Longo, Elson [UNESP]Sousa, Vânia C.M.tebcheranic, SergioKubaski, Evaldo T.Moreira, Mário L.Jurado, Jose R.Cava, Sergio2022-05-01T13:57:25Z2022-05-01T13:57:25Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject268-273http://dx.doi.org/10.4028/www.scientific.net/MSF.820.268Materials Science Forum, v. 820 MSF, p. 268-273.1662-97520255-5476http://hdl.handle.net/11449/23416210.4028/www.scientific.net/MSF.820.2682-s2.0-85124900939Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Science Foruminfo:eu-repo/semantics/openAccess2022-05-01T13:57:25Zoai:repositorio.unesp.br:11449/234162Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:38:55.947956Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
title |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
spellingShingle |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics Delbrücke, Tiago Al2O3-ZrO2 Porous ceramic Replica method Thermal properties |
title_short |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
title_full |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
title_fullStr |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
title_full_unstemmed |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
title_sort |
Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics |
author |
Delbrücke, Tiago |
author_facet |
Delbrücke, Tiago Gouvêa, Rogério A. Raubach, Cristiane W. Longo, Elson [UNESP] Sousa, Vânia C. M.tebcheranic, Sergio Kubaski, Evaldo T. Moreira, Mário L. Jurado, Jose R. Cava, Sergio |
author_role |
author |
author2 |
Gouvêa, Rogério A. Raubach, Cristiane W. Longo, Elson [UNESP] Sousa, Vânia C. M.tebcheranic, Sergio Kubaski, Evaldo T. Moreira, Mário L. Jurado, Jose R. Cava, Sergio |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Federal University of Pelotas Federal University of Rio Grande do Sul Ponta Grossa State University Universidade Estadual Paulista (UNESP) Institute of Glass and Ceramic |
dc.contributor.author.fl_str_mv |
Delbrücke, Tiago Gouvêa, Rogério A. Raubach, Cristiane W. Longo, Elson [UNESP] Sousa, Vânia C. M.tebcheranic, Sergio Kubaski, Evaldo T. Moreira, Mário L. Jurado, Jose R. Cava, Sergio |
dc.subject.por.fl_str_mv |
Al2O3-ZrO2 Porous ceramic Replica method Thermal properties |
topic |
Al2O3-ZrO2 Porous ceramic Replica method Thermal properties |
description |
The improvement on the development of porous ceramic materials has leaded to new technologies in thermal insulation, for example, composite materials for better performance of pressure vessels in rocket engines. Within this context, the present work aims to evaluate the ability of a refractory ceramic base alumina/zirconia through the processes of co-precipitation and replica method in an organic fiber template. The green body was burnt-out and sintered at 1200-1600°C to obtain the continuous porous ceramic fibers. In the FEG-SEM analysis, an interconnected porous structure with small grains was observed. The crystalline phases were determined by X-ray diffraction and compared to micro-Raman results regarding the crystalline structure confirms that there present in the material zirconia is composed of more than one phase. Porosity was calculated through a mercury porosimeter as 77.9%, and the Laser Flash method gave a thermal conductivity value of 1.61 K W.m−1 .K−1 for the Al2 O3-ZrO2 fibers. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2022-05-01T13:57:25Z 2022-05-01T13:57:25Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.4028/www.scientific.net/MSF.820.268 Materials Science Forum, v. 820 MSF, p. 268-273. 1662-9752 0255-5476 http://hdl.handle.net/11449/234162 10.4028/www.scientific.net/MSF.820.268 2-s2.0-85124900939 |
url |
http://dx.doi.org/10.4028/www.scientific.net/MSF.820.268 http://hdl.handle.net/11449/234162 |
identifier_str_mv |
Materials Science Forum, v. 820 MSF, p. 268-273. 1662-9752 0255-5476 10.4028/www.scientific.net/MSF.820.268 2-s2.0-85124900939 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Science Forum |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
268-273 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128683173478400 |