EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/107182 https://doi.org/10.3390/nano9060878 |
Resumo: | The development of metal nanocomposites reinforced by carbon nanotubes (CNTs) remains a focus of the scientific community due to the growing need to produce lightweight advanced materials with unique mechanical properties. However, for the successful production of these nanocomposites, there is a need to consolidate knowledge about how reinforcement influences the matrix microstructure and which are the strengthening mechanisms promoting the best properties. In this context, this investigation focuses on the study of the reinforcement effect on the microstructure of an Ni-CNT nanocomposites produced by powder metallurgy. The microstructural evolution was analysed by electron backscattered diffraction (EBSD). The EBSD results revealed that the dispersion/mixing and pressing processes induce plastic deformation in the as-received powders. The dislocation structures produced in those initial steps are partially eliminated in the sintering process due to the activation of recovery and recrystallization mechanisms. However, the presence of CNTs in the matrix has a significant effect on the dislocation annihilation, thus reducing the recovery of the dislocation structures. |
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EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgymetal matrix nanocompositescarbon nanotubeselectron backscattered di ractiongrain boundarydislocation structurerecrystallizationThe development of metal nanocomposites reinforced by carbon nanotubes (CNTs) remains a focus of the scientific community due to the growing need to produce lightweight advanced materials with unique mechanical properties. However, for the successful production of these nanocomposites, there is a need to consolidate knowledge about how reinforcement influences the matrix microstructure and which are the strengthening mechanisms promoting the best properties. In this context, this investigation focuses on the study of the reinforcement effect on the microstructure of an Ni-CNT nanocomposites produced by powder metallurgy. The microstructural evolution was analysed by electron backscattered diffraction (EBSD). The EBSD results revealed that the dispersion/mixing and pressing processes induce plastic deformation in the as-received powders. The dislocation structures produced in those initial steps are partially eliminated in the sintering process due to the activation of recovery and recrystallization mechanisms. However, the presence of CNTs in the matrix has a significant effect on the dislocation annihilation, thus reducing the recovery of the dislocation structures.MDPI2019-06-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/107182http://hdl.handle.net/10316/107182https://doi.org/10.3390/nano9060878eng2079-4991Carneiro, ÍrisViana, FilomenaVieira, Manuel F.Fernandes, José V.Simões, Sóniainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-06-13T10:54:08Zoai:estudogeral.uc.pt:10316/107182Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:23:32.543757Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
title |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
spellingShingle |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy Carneiro, Íris metal matrix nanocomposites carbon nanotubes electron backscattered di raction grain boundary dislocation structure recrystallization |
title_short |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
title_full |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
title_fullStr |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
title_full_unstemmed |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
title_sort |
EBSD Analysis of Metal Matrix Nanocomposite Microstructure Produced by Powder Metallurgy |
author |
Carneiro, Íris |
author_facet |
Carneiro, Íris Viana, Filomena Vieira, Manuel F. Fernandes, José V. Simões, Sónia |
author_role |
author |
author2 |
Viana, Filomena Vieira, Manuel F. Fernandes, José V. Simões, Sónia |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Carneiro, Íris Viana, Filomena Vieira, Manuel F. Fernandes, José V. Simões, Sónia |
dc.subject.por.fl_str_mv |
metal matrix nanocomposites carbon nanotubes electron backscattered di raction grain boundary dislocation structure recrystallization |
topic |
metal matrix nanocomposites carbon nanotubes electron backscattered di raction grain boundary dislocation structure recrystallization |
description |
The development of metal nanocomposites reinforced by carbon nanotubes (CNTs) remains a focus of the scientific community due to the growing need to produce lightweight advanced materials with unique mechanical properties. However, for the successful production of these nanocomposites, there is a need to consolidate knowledge about how reinforcement influences the matrix microstructure and which are the strengthening mechanisms promoting the best properties. In this context, this investigation focuses on the study of the reinforcement effect on the microstructure of an Ni-CNT nanocomposites produced by powder metallurgy. The microstructural evolution was analysed by electron backscattered diffraction (EBSD). The EBSD results revealed that the dispersion/mixing and pressing processes induce plastic deformation in the as-received powders. The dislocation structures produced in those initial steps are partially eliminated in the sintering process due to the activation of recovery and recrystallization mechanisms. However, the presence of CNTs in the matrix has a significant effect on the dislocation annihilation, thus reducing the recovery of the dislocation structures. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-06-12 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/107182 http://hdl.handle.net/10316/107182 https://doi.org/10.3390/nano9060878 |
url |
http://hdl.handle.net/10316/107182 https://doi.org/10.3390/nano9060878 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2079-4991 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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