Ablative and mechanical properties of quartz phenolic composites
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
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=S2175-91462009000100063 |
Resumo: | Abstract. Quartz phenolic composites have been applied to thermal protection systems (TPSs) for reentry vehicles since the late fifties due to their excellent ablative resistance and mechanical performance. TPSs must withstand the aggressive reentry environment, such as atomic oxygen, when submitted to very high temperatures (> 1000° C) and heat flux. The ablative performance of composites is influenced by both base materiais and environmental parameters during the ablation process. For TPS systems phenolic resin is usually used as the base matrix due to its ability to form a stable char during decomposition. This charplays an important role in the absorption of the heat generated during the ablation process. During re-entry, parts of the charred matrix can be abrasively removed by shear force due to high pressure and velocity. In this work the ablative and mechanical properties of quartz phenolic composites were evaluated in order to identify the range of properties suitable for the use of these materiais as thermal protection systems for space vehicles. Quartz fabric having an areai weight of 680 g/m2 and a resole-typephenolic resin were used to prepare the composites. The resin has a viscosity of l65 MPa at 20°C. The prepreg material was cured by heating under pressure of 100 bar in a mold. The resin content of the prepreg obtained was about 50 per cent. The mechanical properties evaluated were, tensile, shear and flexural strength. The results obtained showed that this material has average values of 38.5 MPa, 52 MPa and 85 MPa for tensile, shear andflexural strength, respectively. The ablative tests were carried out in a high-energy air plasma in ambient atmosphere and the mass losses were measured for different exposure time. |
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Ablative and mechanical properties of quartz phenolic compositesAblationQuartzphenolicMechanical propertiesThermal protection systemsAbstract. Quartz phenolic composites have been applied to thermal protection systems (TPSs) for reentry vehicles since the late fifties due to their excellent ablative resistance and mechanical performance. TPSs must withstand the aggressive reentry environment, such as atomic oxygen, when submitted to very high temperatures (> 1000° C) and heat flux. The ablative performance of composites is influenced by both base materiais and environmental parameters during the ablation process. For TPS systems phenolic resin is usually used as the base matrix due to its ability to form a stable char during decomposition. This charplays an important role in the absorption of the heat generated during the ablation process. During re-entry, parts of the charred matrix can be abrasively removed by shear force due to high pressure and velocity. In this work the ablative and mechanical properties of quartz phenolic composites were evaluated in order to identify the range of properties suitable for the use of these materiais as thermal protection systems for space vehicles. Quartz fabric having an areai weight of 680 g/m2 and a resole-typephenolic resin were used to prepare the composites. The resin has a viscosity of l65 MPa at 20°C. The prepreg material was cured by heating under pressure of 100 bar in a mold. The resin content of the prepreg obtained was about 50 per cent. The mechanical properties evaluated were, tensile, shear and flexural strength. The results obtained showed that this material has average values of 38.5 MPa, 52 MPa and 85 MPa for tensile, shear andflexural strength, respectively. The ablative tests were carried out in a high-energy air plasma in ambient atmosphere and the mass losses were measured for different exposure time.Departamento de Ciência e Tecnologia Aeroespacial2009-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462009000100063Journal of Aerospace Technology and Management v.1 n.1 2009reponame:Journal of Aerospace Technology and Management (Online)instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA)instacron:DCTA10.5028/jatm.2009.01016368info:eu-repo/semantics/openAccessGregori,Maria L.Barros,Edson A.Filho,Gilberto P.Pardini,Luiz CláudioCosta,Sonia F.eng2017-05-29T00:00:00Zoai:scielo:S2175-91462009000100063Revistahttp://www.jatm.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||secretary@jatm.com.br2175-91461984-9648opendoar:2017-05-29T00:00Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA)false |
dc.title.none.fl_str_mv |
Ablative and mechanical properties of quartz phenolic composites |
title |
Ablative and mechanical properties of quartz phenolic composites |
spellingShingle |
Ablative and mechanical properties of quartz phenolic composites Gregori,Maria L. Ablation Quartzphenolic Mechanical properties Thermal protection systems |
title_short |
Ablative and mechanical properties of quartz phenolic composites |
title_full |
Ablative and mechanical properties of quartz phenolic composites |
title_fullStr |
Ablative and mechanical properties of quartz phenolic composites |
title_full_unstemmed |
Ablative and mechanical properties of quartz phenolic composites |
title_sort |
Ablative and mechanical properties of quartz phenolic composites |
author |
Gregori,Maria L. |
author_facet |
Gregori,Maria L. Barros,Edson A. Filho,Gilberto P. Pardini,Luiz Cláudio Costa,Sonia F. |
author_role |
author |
author2 |
Barros,Edson A. Filho,Gilberto P. Pardini,Luiz Cláudio Costa,Sonia F. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Gregori,Maria L. Barros,Edson A. Filho,Gilberto P. Pardini,Luiz Cláudio Costa,Sonia F. |
dc.subject.por.fl_str_mv |
Ablation Quartzphenolic Mechanical properties Thermal protection systems |
topic |
Ablation Quartzphenolic Mechanical properties Thermal protection systems |
description |
Abstract. Quartz phenolic composites have been applied to thermal protection systems (TPSs) for reentry vehicles since the late fifties due to their excellent ablative resistance and mechanical performance. TPSs must withstand the aggressive reentry environment, such as atomic oxygen, when submitted to very high temperatures (> 1000° C) and heat flux. The ablative performance of composites is influenced by both base materiais and environmental parameters during the ablation process. For TPS systems phenolic resin is usually used as the base matrix due to its ability to form a stable char during decomposition. This charplays an important role in the absorption of the heat generated during the ablation process. During re-entry, parts of the charred matrix can be abrasively removed by shear force due to high pressure and velocity. In this work the ablative and mechanical properties of quartz phenolic composites were evaluated in order to identify the range of properties suitable for the use of these materiais as thermal protection systems for space vehicles. Quartz fabric having an areai weight of 680 g/m2 and a resole-typephenolic resin were used to prepare the composites. The resin has a viscosity of l65 MPa at 20°C. The prepreg material was cured by heating under pressure of 100 bar in a mold. The resin content of the prepreg obtained was about 50 per cent. The mechanical properties evaluated were, tensile, shear and flexural strength. The results obtained showed that this material has average values of 38.5 MPa, 52 MPa and 85 MPa for tensile, shear andflexural strength, respectively. The ablative tests were carried out in a high-energy air plasma in ambient atmosphere and the mass losses were measured for different exposure time. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-06-01 |
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=S2175-91462009000100063 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462009000100063 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5028/jatm.2009.01016368 |
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.1 n.1 2009 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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1754732530352783360 |