Novel Aluminum (Al)-Carbon Nanotube (CNT) Open-Cell Foams

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

doi:10.1007/s11661-016-3423-9

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…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%

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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: 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%

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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“…As opposed to the abovementioned processes, the solid state process offers greater advantages in terms of higher processing temperature, absence of additional materials (e. g. stabilizer agents) and higher quality, characterized by the uniform distribution of pore sizes and porosity [5]. In this process, a temporary material known as a space holder or pore creator is commonly introduced to develop a porous structure with accurate control of shape, size, fraction and connectivity of pores [5][6]. By using sodium chloride (NaCl) as a space holder, a porous aluminum composite, having a maximum porosity of 78 wt.%, was developed [6].…”

Section: Introductionmentioning

confidence: 99%

“…In this process, a temporary material known as a space holder or pore creator is commonly introduced to develop a porous structure with accurate control of shape, size, fraction and connectivity of pores [5][6]. By using sodium chloride (NaCl) as a space holder, a porous aluminum composite, having a maximum porosity of 78 wt.%, was developed [6]. Porous aluminum with various porosities was fabricated by a solid state approach based on the powder metallurgy technique, using titanium hydride (TiH 2 ) as a space holder [7].…”

Section: Introductionmentioning

confidence: 99%

Preliminary development of porous aluminum via powder metallurgy technique

Jamal

Maizatul

Anuar

et al. 2018

Materialwissenschaft Werkst

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Porous aluminum has been extensively studied, particularly in the field in which lightweight and high stiffness properties are essential. In this study, a preliminary investigation is performed to determine the optimum sintering temperature to develop porous aluminium by a powder metallurgy technique, using polymethylmethacrylate as a space holder. The effects of the sintering temperatures on the physical characteristics, oxidation level, microstructure and sintered density of the porous specimen are systematically evaluated. Based on the results, an increase in the sintering temperature from 580 8C to 600 8C changes the colour of the porous aluminum body from a silver-like colour to a gold-like colour, with some of the specimens encountering severe cracking, spalling and even collapsing. As such, the oxygen content is significantly increased from 0.45 wt.% to 2.14 wt. %, suggesting the oxidation phenomenon. In line with this, an obvious appearance of particle boundaries with less macro-pores formation is also observed. Additionally, the sintered density of the porous specimen is found to reduce from 1.305 g/cm 3 to 0.908 g/cm 3 . Therefore, fabrication of the resultant porous aluminium at 580 8C is an ideal condition in this study, owing to the ideal combination of physical characteristics, microstructure, oxidation level and sintered density. Keywords: Porous aluminium / polymethylmethacrylate / powder metallurgy / sintering temperature / physical characteristics / microstructure / oxidation level / sintered density Schlü sselwö rter: Porö ses Aluminium / Polymethylmethacrylat / Pulvermetallurgie / Sintertemperatur / physikalische Eigenschaften / Gefü ge / Oxidationsstufe / Sinterdichte Preliminary development of porous aluminum

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Novel Aluminum (Al)-Carbon Nanotube (CNT) Open-Cell Foams

Cited by 9 publications

References 16 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)

Preliminary development of porous aluminum via powder metallurgy technique

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