Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy

The present work aims to investigate the strengthening mechanisms in aluminum matrix nanocomposites reinforced by carbon nanotubes (CNTs). A classical powder metallurgy route produced Al-CNT nanocomposites using ultrasonication and ball milling as dispersion/mixture techniques. The microstructural c...

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Autores principales:	Íris Carneiro, José Valdemar Fernandes, Sónia Simões
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	strengthening mechanisms metal matrix nanocomposites powder metallurgy load transfer second-phase particles strain hardening Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/427fccb3107540d1a256d55c95969b73
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spelling	oai:doaj.org-article:427fccb3107540d1a256d55c95969b732021-11-25T18:21:24ZStrengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy10.3390/met111117112075-4701https://doaj.org/article/427fccb3107540d1a256d55c95969b732021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1711https://doaj.org/toc/2075-4701The present work aims to investigate the strengthening mechanisms in aluminum matrix nanocomposites reinforced by carbon nanotubes (CNTs). A classical powder metallurgy route produced Al-CNT nanocomposites using ultrasonication and ball milling as dispersion/mixture techniques. The microstructural characterization is crucial for this study to reach the objective, being performed mainly by electron backscattered diffraction (EBSD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). Uniform dispersion without damaging the CNTs structure is the key for the nanocomposite by powder metallurgy production process. The reinforcement effect occurs due to several strengthening mechanisms that act simultaneously. For the Al-CNT nanocomposites produced by ultrasonication as a dispersion/mixture technique, the observed improvement in the mechanical properties of nanocomposites can be attributed to the load transfer from the matrix to the CNTs. The strain hardening and the second-phase hardening can also have a small contribution to the strengthening of the nanocomposites.Íris CarneiroJosé Valdemar FernandesSónia SimõesMDPI AGarticlestrengthening mechanismsmetal matrix nanocompositespowder metallurgyload transfersecond-phase particlesstrain hardeningMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1711, p 1711 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	strengthening mechanisms metal matrix nanocomposites powder metallurgy load transfer second-phase particles strain hardening Mining engineering. Metallurgy TN1-997
spellingShingle	strengthening mechanisms metal matrix nanocomposites powder metallurgy load transfer second-phase particles strain hardening Mining engineering. Metallurgy TN1-997 Íris Carneiro José Valdemar Fernandes Sónia Simões Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy
description	The present work aims to investigate the strengthening mechanisms in aluminum matrix nanocomposites reinforced by carbon nanotubes (CNTs). A classical powder metallurgy route produced Al-CNT nanocomposites using ultrasonication and ball milling as dispersion/mixture techniques. The microstructural characterization is crucial for this study to reach the objective, being performed mainly by electron backscattered diffraction (EBSD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). Uniform dispersion without damaging the CNTs structure is the key for the nanocomposite by powder metallurgy production process. The reinforcement effect occurs due to several strengthening mechanisms that act simultaneously. For the Al-CNT nanocomposites produced by ultrasonication as a dispersion/mixture technique, the observed improvement in the mechanical properties of nanocomposites can be attributed to the load transfer from the matrix to the CNTs. The strain hardening and the second-phase hardening can also have a small contribution to the strengthening of the nanocomposites.
format	article
author	Íris Carneiro José Valdemar Fernandes Sónia Simões
author_facet	Íris Carneiro José Valdemar Fernandes Sónia Simões
author_sort	Íris Carneiro
title	Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy
title_short	Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy
title_full	Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy
title_fullStr	Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy
title_full_unstemmed	Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy
title_sort	strengthening mechanisms of aluminum matrix nanocomposites reinforced with cnts produced by powder metallurgy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/427fccb3107540d1a256d55c95969b73
work_keys_str_mv	AT iriscarneiro strengtheningmechanismsofaluminummatrixnanocompositesreinforcedwithcntsproducedbypowdermetallurgy AT josevaldemarfernandes strengtheningmechanismsofaluminummatrixnanocompositesreinforcedwithcntsproducedbypowdermetallurgy AT soniasimoes strengtheningmechanismsofaluminummatrixnanocompositesreinforcedwithcntsproducedbypowdermetallurgy
_version_	1718411251499925504

Strengthening Mechanisms of Aluminum Matrix Nanocomposites Reinforced with CNTs Produced by Powder Metallurgy

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