Melted and recrystallized holey-graphene-reinforced aluminum composites: Structure, elasticity and strength

Guarda Catia; Faria Bruno; Silvestre NunoLopes Jose N. C.Pugno Nicola M.

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Melted and recrystallized holey-graphene-reinforced aluminum composites: Structure, elasticity and strength

机译：Melted and recrystallized holey-graphene-reinforced aluminum composites: Structure, elasticity and strength

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This paper aims to investigate the elasticity, strength and failure of aluminum (Al) nanocomposites with holey-graphene (hG), which were melted and recrystallized. Five nanocomposites (Al-graphene and four Al-hG -two of them doped, with nitrogen and boron) were studied by molecular dynamics simulations. They were melted and subsequently recrystallized at a fixed cooling rate of 0.25 K/ps. The nucleation temperature of nanocomposites was increased by 300-200 K compared to pure aluminum. The Al crystallization in the nanocomposites was about 85 % (97 % for pure Al). The nanocomposites with undoped nanofillers showed an increase in Young's modulus between 15 and 27 % relative to pure Al, while doped nanofillers showed no improvement. The mechanical properties of the nanocomposites depended on the characteristics of the nanofillers, namely (i) the porosity, (ii) the percentage of recrystallization of the Al matrix, and (iii) the interfacial adhesion in the interface Al-nanofillers. The results show that undoped nanofillers have much higher Young's modulus and lower porosity compared to the doped nanofillers (N-hG and B-hG). Finally, the application of the inverse rule of mixtures to extract the Young's modulus of the nanocomposite was successful.

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来源
《Composite structures》 |2022年第7期|115679.1-115679.18|共18页
作者
Guarda Catia; Faria Bruno; Silvestre NunoLopes Jose N. C.Pugno Nicola M.;
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作者单位

Univ Lisbon, Dept Chem Engn, CQE, Inst Super Tecn, Ave Rovisco Pais, P-1049001 Lisbon, Portugal;

Univ Minho, IPC Inst Polymers & Composites, Polymer Engn Dept, Campus Azurem, P-4804533 Guimaraes, Portugal;

Univ Lisbon, Dept Mech Engn, IDMEC, Inst Super Tecn, Ave Rovisco Pais, P-1049001 Lisbon, PortugalUniv Trento, Dept Civil, Lab Bioinspired Bion Nano Meta Mat & Mech, Via Mesiano 77, I-38123 Trento, Italy|Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
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正文语种英语
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Melted and recrystallized holey-graphene-reinforced aluminum composites: Structure, elasticity and strength

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