ALUHAB — The Superior Aluminium Foam

Babcsán, Norbert; Beke, Sándor; Makk, P.; Soki, P.; Számel, Gy; Degischer, H. P.

doi:10.1007/978-3-319-48761-8_150

Cited by 4 publications

(7 citation statements)

References 3 publications

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“…Bubbles rise, accumulate, and solidify, and aluminum foams are fabricated [56]. Porosities of foams fabricated by this method are generally 75~98%, the pore size is generally 3~25 mm [8,57], and under certain conditions, foams with d r of 1 mm can be obtained [58,59]. The GIF method is suitable for the continuous production of slabs.…”

Section: Gas Injection Foaming Methodsmentioning

confidence: 99%

“…For the blowing modes, the vibration and movement of nozzles can effectively reduce bubble size. In the work of Babcsán [58], the use of ultrasonic vibration on the nozzle was shown to enable precise control of bubble size. Wang [74] used a high-speed horizontal oscillation system and reduced the pore size of foams from 10 mm to less than 4 mm.…”

Section: Gas Injection Foaming Methodsmentioning

confidence: 99%

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Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

Fu,

2024

Materials

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Closed-cell aluminum foams have many excellent properties, such as low density, high specific strength, great energy absorption, good sound absorption, electromagnetic shielding, heat and flame insulation, etc. As a new kind of material, closed-cell aluminum foams have been used in lightweight structures, traffic collision protections, sound absorption walls, building decorations, and many other places. In this paper, the recent progress of closed-cell aluminum foams, on fabrication techniques, including the melt foaming method, gas injection foaming method, and powder metallurgy foaming method, and on processing techniques, including powder metallurgy foaming process, two-step foaming process, cast foaming process, gas injection foaming process, mold pressing process, and integral foaming process, are summarized. Properties and applications of closed-cell aluminum foams are discussed based on the mechanical properties and physical properties separately. Special focuses are made on the newly developed cast-forming process for complex 3D parts and the improvement of mechanical properties by the development of small pore size foam fabrication and modification of cell wall microstructures.

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Section: Gas Injection Foaming Methodsmentioning

confidence: 99%

Section: Gas Injection Foaming Methodsmentioning

confidence: 99%

Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

Fu,

2024

Materials

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“…The samples of metal foams were fabricated according to the method presented in the previous study, [ 15 ] as shown in Figure a. Liquid Duralcan was held in a heating crucible at a temperature of 700 °C.…”

Section: Methodsmentioning

confidence: 99%

Acoustic‐Pressure‐Assisted Engineering of Aluminum Foams

et al. 2021

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Shaping metals as a foam modulates their physical properties, enabling attractive applications where lightweight, low thermal conductivity, or acoustic isolation are desirable. Adjusting the size of the bubbles in the foams is particularly relevant for targeted applications. Herein, a method with a detailed theoretical understanding of how to tune the size of the bubbles in aluminum melts in situ via acoustic pressure is provided. The description is in full agreement with the high‐rate 3D X‐ray radioscopy of the bubble formation. The study with the intriguing results on the effect of foaming on electrical resistivity, Seebeck coefficient, and thermal conductivity from cryogenic to room temperature is complemented. Compared with bulk materials, the investigated foam shows an enhancement in the thermoelectric figure of merit. These results herald promising application of foaming in thermoelectric materials and devices for conversion of thermal energy.

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“…Babcsán et al obtained aluminum foams with submillimetersized pores by adding ultrafine stabilizing particles to an aluminum melt and introducing ultrasonic vibration during preparation. [30][31][32] García-Moreno et al attained small bubbles by reducing the equivalent area of gas-injecting cannulae, optimizing the cannula shapes and applying oscillations to the cannulae. [8] They also observed that small and uniform bubbles aligned in chains, which implies an initial formation of ordered foam structures.…”

Section: Introductionmentioning

confidence: 99%

Short‐Range Ordered Aluminum Foams

et al. 2021

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Ordering the bubbles of closed‐cell aluminum foams can contribute to decorative esthetics and create directional mechanical properties that disordered foams do not have. High‐porosity (>80%) aluminum foams prepared by the traditional static gas injection method usually have large and polyhedral cells, which do not form an ordered stacking. Aluminum foams with relatively uniform and small cells (cell size ≈1.2 mm) have been recently obtained by gas injection through a nozzle rotating at high speed. Herein, the stacking of aluminum foams with different cell sizes and a monodisperse aqueous foam are characterized by X‐ray tomography and compared with an ideal face‐centered cubic (FCC) structure. The aluminum foam featuring the smallest cells has a concentrated distribution of cell coordination number with a peak of 12 and the first peaks of the radial distribution function are found to be consistent with those of the monodisperse aqueous foam and an ideal FCC structure. Furthermore, many aligned bubble chains with more than five bubbles are observed on cross‐sectional images. Therefore, aluminum foam can become short‐range ordered whenever the cell size is uniform enough and reduced to around 1.2 mm. Methods for further improving the order of aluminum foam are discussed.

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ALUHAB — The Superior Aluminium Foam

Cited by 4 publications

References 3 publications

Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

Fabrication, Processing, Properties, and Applications of Closed-Cell Aluminum Foams: A Review

Acoustic‐Pressure‐Assisted Engineering of Aluminum Foams

Short‐Range Ordered Aluminum Foams

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