Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites

Abstract We investigated the reinforcing effect of supersaturated Al-C phases on the mechanical properties of Al/C60 composites produced via powder metallurgy followed by thermal treatment. We controlled the fractions of C60-fullerenes, nano-scale carbides, and Al-C supersaturated phases in the Al/C...

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Autores principales:	Seungjin Nam, Sooun Lee, Aeran Roh, Hansol Son, Miso Kim, Hyunjoo Choi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eb1571118e7d4ffcbbaca05c3adc0fed
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spelling	oai:doaj.org-article:eb1571118e7d4ffcbbaca05c3adc0fed2021-12-02T18:02:55ZRole of supersaturated Al-C phases in mechanical properties of Al/fullerene composites10.1038/s41598-021-92551-y2045-2322https://doaj.org/article/eb1571118e7d4ffcbbaca05c3adc0fed2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92551-yhttps://doaj.org/toc/2045-2322Abstract We investigated the reinforcing effect of supersaturated Al-C phases on the mechanical properties of Al/C60 composites produced via powder metallurgy followed by thermal treatment. We controlled the fractions of C60-fullerenes, nano-scale carbides, and Al-C supersaturated phases in the Al/C60 composites by adjusting the heat-treatment temperature and duration. Furthermore, we examined the contribution of each phase on the elastic and plastic behavior of the composites using scanning acoustic microscopy (SAM) and hardness measurements. After heat treatment, a supersaturated Al-C phase and an Al carbide were formed in the Al/C composites by decomposition of individually dispersed C60. This led to enhancement of the hardness and elastic modulus of the Al/C composites heat-treated at 450 and 500 °C, while these properties were reduced in the 650 °C heat-treated composite. Notably, the 500 °C heat-treated composites showed significantly high hardness and elastic modulus (approximately 250 Hv and 77.8 GPa, respectively) owing to the substantially large contribution of the supersaturated Al-C phases, which was theoretically calculated to be 851 GPa/vol% and 227 GPa/vol%, respectively. This is possibly because the well-dispersed C in the atomic scale changed the elastic bonding characteristics of the metallic bonds between the Al atoms.Seungjin NamSooun LeeAeran RohHansol SonMiso KimHyunjoo ChoiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Seungjin Nam Sooun Lee Aeran Roh Hansol Son Miso Kim Hyunjoo Choi Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites
description	Abstract We investigated the reinforcing effect of supersaturated Al-C phases on the mechanical properties of Al/C60 composites produced via powder metallurgy followed by thermal treatment. We controlled the fractions of C60-fullerenes, nano-scale carbides, and Al-C supersaturated phases in the Al/C60 composites by adjusting the heat-treatment temperature and duration. Furthermore, we examined the contribution of each phase on the elastic and plastic behavior of the composites using scanning acoustic microscopy (SAM) and hardness measurements. After heat treatment, a supersaturated Al-C phase and an Al carbide were formed in the Al/C composites by decomposition of individually dispersed C60. This led to enhancement of the hardness and elastic modulus of the Al/C composites heat-treated at 450 and 500 °C, while these properties were reduced in the 650 °C heat-treated composite. Notably, the 500 °C heat-treated composites showed significantly high hardness and elastic modulus (approximately 250 Hv and 77.8 GPa, respectively) owing to the substantially large contribution of the supersaturated Al-C phases, which was theoretically calculated to be 851 GPa/vol% and 227 GPa/vol%, respectively. This is possibly because the well-dispersed C in the atomic scale changed the elastic bonding characteristics of the metallic bonds between the Al atoms.
format	article
author	Seungjin Nam Sooun Lee Aeran Roh Hansol Son Miso Kim Hyunjoo Choi
author_facet	Seungjin Nam Sooun Lee Aeran Roh Hansol Son Miso Kim Hyunjoo Choi
author_sort	Seungjin Nam
title	Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites
title_short	Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites
title_full	Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites
title_fullStr	Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites
title_full_unstemmed	Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites
title_sort	role of supersaturated al-c phases in mechanical properties of al/fullerene composites
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/eb1571118e7d4ffcbbaca05c3adc0fed
work_keys_str_mv	AT seungjinnam roleofsupersaturatedalcphasesinmechanicalpropertiesofalfullerenecomposites AT soounlee roleofsupersaturatedalcphasesinmechanicalpropertiesofalfullerenecomposites AT aeranroh roleofsupersaturatedalcphasesinmechanicalpropertiesofalfullerenecomposites AT hansolson roleofsupersaturatedalcphasesinmechanicalpropertiesofalfullerenecomposites AT misokim roleofsupersaturatedalcphasesinmechanicalpropertiesofalfullerenecomposites AT hyunjoochoi roleofsupersaturatedalcphasesinmechanicalpropertiesofalfullerenecomposites
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Role of supersaturated Al-C phases in mechanical properties of Al/fullerene composites

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