Processing, characterization, and properties of aluminum–carbon nanotube open-cell foams

Krommenhoek, M.; Shamma, Mohamed; Morsi, K.

doi:10.1007/s10853-016-0653-6

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…Having a relatively high blowing agent content, 2.5 wt%, when foaming at 40 bar, was found to produce well-distributed small pores and good expansion (this is in contrast to foaming under atmospheric pressure which results in coarser pores [120,121]). However, increasing the blowing agent content does also significantly increase the cost of production [21].…”

Section: Foaming Environmentmentioning

confidence: 99%

“…We believe that the use of 150 nm particle size aluminum may have also negatively impacted foaming due to the expected significant oxides present on these particles which have exceedingly large surface areas. Due to the superior properties of carbon nanotubes, a number of studies incorporated them in both open-cell [20,21] and closed-cell [111,[141][142][143] metallic foams. Duarte et al [143] investigated a colloidal step to aid in the dispersion of functionalized 2-5 nm diameter and 10-30 µm length multiwall carbon nanotubes (MWCNTs-COOH) in AlSi12.…”

Section: Pcmfp Of Aluminum-composite Foamsmentioning

confidence: 99%

“…Powder metallurgy (PM) has played a significant role in the production of both opencell [20,21] and closed-cell metallic foams [22,23]. The production of closed-cell metallic foams is not restricted to the PM route; their production through a purely melt route has also been investigated extensively.…”

Section: Introductionmentioning

confidence: 99%

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Review: Closed-Cell Metallic Foams Produced via Powder Metallurgy

Behymer,

Morsi

2023

Metals

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The production of closed-cell metallic foams has been of interest to the scientific community and industry for decades, owing to their unique properties, which include high specific strength and stiffness, buoyancy, shock absorption, and crash worthiness. One of the approaches for their fabrication relies solely on the use of powders and is manifested in what has been referred to as the powder metallurgy (PM) route. This review discusses the underlying fundamentals of the process, and recent developments together with our current understanding. The effect of process parameters on the developed foam structure is reviewed for a range of metals, alloys, and metal matrix composites. Fundamental foaming mechanisms and characteristics are discussed.

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Section: Foaming Environmentmentioning

confidence: 99%

Section: Pcmfp Of Aluminum-composite Foamsmentioning

confidence: 99%

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Review: Closed-Cell Metallic Foams Produced via Powder Metallurgy

Behymer,

Morsi

2023

Metals

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“…Interest in metallic foams has significantly grown over the past few decades, largely due to their unique physical and mechanical properties [1][2][3][4]. Such properties include a high internal specific surface area (for open-cell foams), a high stiffness-to-weight ratio, a high strength-weight ratio, and an ability to absorb sound and energy [5][6][7][8][9][10][11]. There are two basic types of metallic foams, open-cell foams, where the pores are interconnected throughout the foam structure, and closed-cell foams, where pores are isolated inside the volume of the foam.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Uniform and Rounded Closed-Cell Aluminum Foams Using Novel Foamable Precursor Particles (FPPs)

Mudge,

Morsi

2024

Metals

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The powder metallurgy (PM) route for the production of closed-cell metallic foams has recently received a significant amount of attention. One of the major issues is the non-uniform and non-spherical nature of the cells produced, which can negatively affect the mechanical behavior. The current paper uses the PM route to process metallic foams for the first time using novel Al-TiH2 foamable precursor “particles” (FPPs). The effect of FPP content (0–10 wt.%) on the developed foam structure of aluminum and its mechanical properties is investigated. An increase in FPP content results in a decline in product density by forming uniform and near-spherical cells. The main advantage of the FPPs is the localization of the blowing agent TiH2 particle content within Al-TiH2 composite particles (i.e., giving rise to a higher local TiH2 content), which has led to the production of pores with relatively high circularities even at very low overall TiH2 contents. The foams produced displayed energy absorption capacities of 10–25 MJ/m3 at 50% strain, and maximum energy absorption efficiencies ranging from 0.6–0.7 (for 40–60% closed cell content)

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“…Additionally, in recent investigations for achieving porosities in composite foams fabricated by powder metallurgical method sodium chloride (NaCl), carbamide particles have been utilized [32][33][34][35][36]. These allow the porosities to be tailored, resulting in a porous structure with control over the shape, pore fraction and size [37]. However, there are some issues associated with them; some are toxic, while others do not completely leach out during the leaching process.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Strengthening Effect of Coated Diamond Particles on the Porous Aluminum Composites

et al. 2023

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In this work, porous Al alloy-based composites with varying Ti-coated diamond contents (0, 4, 6, 12 and 15 wt.%) were prepared, employing the powder metallurgy route and using a fixed amount (25 wt.%) of polymethylmethacrylate (PMMA) as a space holder. The effects of the varying wt.% of diamond particles on the microstructure, porosities, densities and compressive behaviors were systematically evaluated. The microstructure study revealed that the porous composites exhibited a well-defined and uniform porous structure with good interfacial bonding between the Al alloy matrix and diamond particles. The porosities ranged from 18% to 35%, with an increase in the diamond content. The maximum value of plateau stress of 31.51 MPa and an energy absorption capacity of 7.46 MJ/m3 were acquired for a composite with 12 wt.% of Ti-coated diamond content; beyond this wt.%, the properties declined. Thus, the presence of diamond particles, especially in the cell walls of porous composites, strengthened their cell walls and improved their compressive properties.

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Processing, characterization, and properties of aluminum–carbon nanotube open-cell foams

Cited by 9 publications

References 32 publications

Review: Closed-Cell Metallic Foams Produced via Powder Metallurgy

Review: Closed-Cell Metallic Foams Produced via Powder Metallurgy

Fabrication of Uniform and Rounded Closed-Cell Aluminum Foams Using Novel Foamable Precursor Particles (FPPs)

Microstructure and Strengthening Effect of Coated Diamond Particles on the Porous Aluminum Composites

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