Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites
Autor(a) principal: | |
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Data de Publicação: | 2021 |
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/10316/105279 https://doi.org/10.3390/nano11061426 |
Resumo: | The strengthening effect of carbon nanotubes (CNTs) in metal matrix nanocomposites occurs due to several mechanisms that act simultaneously. The possible strengthening mechanisms for metal matrix nanocomposites reinforced with CNTs consist of: (1) load transfer, (2) grain refinement and texture strengthening, (3) second phase strengthening, and (4) strain hardening. The main focus of this work is to identify the strengthening mechanisms that play a role in the case of the Ni-CNT nanocomposite produced by powder metallurgy. For the dispersion and mixing of the metallic powders with CNTs, two different routes were performed by ultrasonication and ball milling. The results indicated that four different strengthening mechanisms are present in the nanocomposites and had a different contribution to the final mechanical properties. The load transfer and the increase in dislocation density seem to strongly affect the properties and microstructure of the nanocomposite. The grain refinement and the presence of second phase particles have a small contribution in the strengthening of this nanocomposite, since the introduction of CNTs in the Ni matrix slightly affects the size and orientation of the grains in the matrix and a few nanometric particles of Ni3C were identified. |
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Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocompositesstrengthening mechanismscarbon nanotubesmetal matrix nanocompositespowder metallurgyload transfersecond phase particlesdislocation densitygrain sizeThe strengthening effect of carbon nanotubes (CNTs) in metal matrix nanocomposites occurs due to several mechanisms that act simultaneously. The possible strengthening mechanisms for metal matrix nanocomposites reinforced with CNTs consist of: (1) load transfer, (2) grain refinement and texture strengthening, (3) second phase strengthening, and (4) strain hardening. The main focus of this work is to identify the strengthening mechanisms that play a role in the case of the Ni-CNT nanocomposite produced by powder metallurgy. For the dispersion and mixing of the metallic powders with CNTs, two different routes were performed by ultrasonication and ball milling. The results indicated that four different strengthening mechanisms are present in the nanocomposites and had a different contribution to the final mechanical properties. The load transfer and the increase in dislocation density seem to strongly affect the properties and microstructure of the nanocomposite. The grain refinement and the presence of second phase particles have a small contribution in the strengthening of this nanocomposite, since the introduction of CNTs in the Ni matrix slightly affects the size and orientation of the grains in the matrix and a few nanometric particles of Ni3C were identified.MDPI2021-05-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/105279http://hdl.handle.net/10316/105279https://doi.org/10.3390/nano11061426eng2079-4991Carneiro, ÍrisFernandes, José ValdemarSimões, 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:RCAAP2023-02-14T11:28:29Zoai:estudogeral.uc.pt:10316/105279Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:21:52.566954Repositório 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 |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
title |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
spellingShingle |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites Carneiro, Íris strengthening mechanisms carbon nanotubes metal matrix nanocomposites powder metallurgy load transfer second phase particles dislocation density grain size |
title_short |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
title_full |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
title_fullStr |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
title_full_unstemmed |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
title_sort |
Investigation on the Strengthening Mechanisms of Nickel Matrix Nanocomposites |
author |
Carneiro, Íris |
author_facet |
Carneiro, Íris Fernandes, José Valdemar Simões, Sónia |
author_role |
author |
author2 |
Fernandes, José Valdemar Simões, Sónia |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Carneiro, Íris Fernandes, José Valdemar Simões, Sónia |
dc.subject.por.fl_str_mv |
strengthening mechanisms carbon nanotubes metal matrix nanocomposites powder metallurgy load transfer second phase particles dislocation density grain size |
topic |
strengthening mechanisms carbon nanotubes metal matrix nanocomposites powder metallurgy load transfer second phase particles dislocation density grain size |
description |
The strengthening effect of carbon nanotubes (CNTs) in metal matrix nanocomposites occurs due to several mechanisms that act simultaneously. The possible strengthening mechanisms for metal matrix nanocomposites reinforced with CNTs consist of: (1) load transfer, (2) grain refinement and texture strengthening, (3) second phase strengthening, and (4) strain hardening. The main focus of this work is to identify the strengthening mechanisms that play a role in the case of the Ni-CNT nanocomposite produced by powder metallurgy. For the dispersion and mixing of the metallic powders with CNTs, two different routes were performed by ultrasonication and ball milling. The results indicated that four different strengthening mechanisms are present in the nanocomposites and had a different contribution to the final mechanical properties. The load transfer and the increase in dislocation density seem to strongly affect the properties and microstructure of the nanocomposite. The grain refinement and the presence of second phase particles have a small contribution in the strengthening of this nanocomposite, since the introduction of CNTs in the Ni matrix slightly affects the size and orientation of the grains in the matrix and a few nanometric particles of Ni3C were identified. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-05-28 |
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/10316/105279 http://hdl.handle.net/10316/105279 https://doi.org/10.3390/nano11061426 |
url |
http://hdl.handle.net/10316/105279 https://doi.org/10.3390/nano11061426 |
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) |
collection |
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 |
repository.mail.fl_str_mv |
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1799134109435428864 |