Enhancement of the mechanical strength of aluminum foams by SiC nanoparticles

Du, Yan; Li, A.B.; Zhang, X.X.; Tan, Zeyi; Su, Ronghua; Pu, Fei; Li, Geng

doi:10.1016/j.matlet.2015.02.066

Cited by 47 publications

(17 citation statements)

References 13 publications

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“…However, AMCFs are brittle foams that exhibit small fluctuations of stress and no obvious increase of stress in plateau stage. In spite of this, the fluctuations of stress in our works are much smaller than that of Al foams reinforced by other ceramic phases, which is mainly due to the uniform distribution and high toughness of CNTs . As shown in Figure B, the yield strength ( σ s ) and plateau stress ( σ pl ) increase with increasing CNT contents.…”

Section: Resultsmentioning

confidence: 59%

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Yang

et al. 2020

Fatigue Fract Eng Mat Struct

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The compression‐compression fatigue performance of carbon nanotube (CNT) reinforced aluminium matrix composite foams (AMCFs) were investigated. The ε‐N curves of AMCFs are composed of three stages (the elastic, strain hardening, and rapid accumulation stages), while the fatigue strain of AMCFs accumulates very rapidly in stage III compared with Al foams. The fatigue strength of AMCFs with CNT contents of 2.0, 2.5, and 3.0 wt% increases by 6%, 44%, and 102% than Al foams, respectively. Different from Al foams' deformation of layer‐by‐layer, the main failure modes of AMCFs are the brittle fracture and collapse of pores within significant shear deformation bands under fatigue loading. The uniform distribution of CNTs and good interfacial bonding of CNTs and Al matrix is the important factor for the improvement of fatigue properties of AMCFs.

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Section: Resultsmentioning

confidence: 59%

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Yang

et al. 2020

Fatigue Fract Eng Mat Struct

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“…The addition of nano-sized ceramic (e.g., alumina [ 125 ] and SiC [ 126 ]) particles was shown to enhance foam stability and homogeneity of the cellular structure without causing structural defects. Different ex-situ and in-situ strategies have been developed to uniformly disperse the nanoparticles in the powders mixture using ultrasonic methods, or incorporate them in molten metal through an in situ reaction.…”

Section: Nanocomposite Metal Foamsmentioning

confidence: 99%

“…The results have shown that nano-sized ceramic particles reduce the brittleness of the foams in comparison to micro-sized ones. Moreover, small additions of nanoparticles improved the foam structure, refined pore size and homogeneity of the pore distribution leading to significant enhancements of yield stress (194.5%), plateau stress, an increase of energy absorption (69.4%) in comparison to the conventional aluminum foams [ 126 ]. The pores of nanocomposites foams were much finer than those of pure Al-foams, changing from millimeter to micrometer range.…”

Section: Nanocomposite Metal Foamsmentioning

confidence: 99%

“…Nanoscale reinforcements have been incorporated in several types of matrices to obtain nanocomposite foams, but the number of available literature reports is scarce [ 126 , 127 , 128 , 129 ]. A small addition (usually less than 2 wt.%) of nanoparticles can significantly strengthen the metal matrix, solving the problems of current Al-foams incorporating high loadings (generally above 10 vol.%) of microscale reinforcements required to achieve the desired levels for the mechanical properties (e.g., elastic modulus) and dimensional stability, thus compromising the weight and the toughness of the final composites.…”

Section: Nanocomposite Metal Foamsmentioning

confidence: 99%

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Composite and Nanocomposite Metal Foams

2016

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Open-cell and closed-cell metal foams have been reinforced with different kinds of micro- and nano-sized reinforcements to enhance their mechanical properties of the metallic matrix. The idea behind this is that the reinforcement will strengthen the matrix of the cell edges and cell walls and provide high strength and stiffness. This manuscript provides an updated overview of the different manufacturing processes of composite and nanocomposite metal foams.

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“…Alizadeh et al [ 7 ] manufactured open-cell Al-Al 2 O 3 composite foams, using the space-holder method, and investigated the mechanical properties and energy absorption behavior of open cell Al foams, containing different volume fractions of Al 2 O 3 . Du et al [ 9 ] examined the effect of nanoparticles on the micro-structure, compressive performance and energy absorption of Al foams. Furthermore, Sun et al [ 10 , 11 ] prepared nanocopper coated aluminum foam and studied the mechanical properties of Al/Cu hybrid foam via experimental investigation and numerical modeling.…”

Section: Introductionmentioning

confidence: 99%

Study on Quasi-Static Uniaxial Compression Properties and Constitutive Equation of Spherical Cell Porous Aluminum-Polyurethane Composites

Bao

2018

Materials

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Quasi-static uniaxial compression properties and the constitutive equation of spherical cell porous aluminum-polyurethane composites (SCPA-PU composites) were investigated in this paper. The effects of relative density on the densification strain, plateau stress and energy absorption properties of the SCPA-PU composites were analyzed. It is found that the stress-strain curves of SCPA-PU composites consist of three stages: The linear elastic part, longer plastic plateau segment and densification region. The results also demonstrate that both the plateau stress and the densification strain energy of the SCPA-PU composites can be improved by increasing the relative density of the spherical cell porous aluminum (SCPA), while the densification strain of the SCPA-PU composites shows little dependence on the relative density of the SCPA. Furthermore, the applicability of three representative phenomenological models to the constitutive equations of SCPA-PU composites are verified and compared based on the experimental results. The error analysis result indicates that the Avalle model is the best model to characterize the uniaxial compression constitutive equation of SCPA-PU composites.

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Enhancement of the mechanical strength of aluminum foams by SiC nanoparticles

Cited by 47 publications

References 13 publications

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Compression‐compression fatigue performance of aluminium matrix composite foams reinforced by carbon nanotubes

Composite and Nanocomposite Metal Foams

Study on Quasi-Static Uniaxial Compression Properties and Constitutive Equation of Spherical Cell Porous Aluminum-Polyurethane Composites

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