Foam stabilization by aluminum powder

Swamiappan, Sasikumar; Georgy, K. H.; Mukherjee, M.; Kumar, G. S. Vinod

doi:10.1016/j.matlet.2019.127142

Cited by 17 publications

(3 citation statements)

References 17 publications

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“…These studies tried to add different kinds of TAs and FAs to the melt. TAs mainly include Ca [36], Mg [39], fly ash [40], SiC [41], Al powders [42], and MnO 2 [43]. Among the TAs, Ca shows the best foam stabilization ability, and melt treatment with Ca is the only option for commercial production.…”

Section: Melt Foaming Methodsmentioning

confidence: 99%

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: Melt Foaming Methodsmentioning

confidence: 99%

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

Fu,

2024

Materials

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“…47,68 In addition to blowing agents various stabilizing elements usually ceramics have been used over the years to achieve foam stability. 11,48,[69][70][71][72][73] Typical studies of foams using dolomite as the blowing agent powder through the precursor method, indicate the possibility of manufacturing the foam with desired mechanical properties at very low costs as compared to the ones using expensive blowing agents. 15,17 The metal foam so produced was further investigated for its compressive behavior and was found at par with the foams produced using conventional blowing agents.…”

Section: Mechanical Behavior Of Aluminum Metal Foammentioning

confidence: 99%

A review of the compressive properties of closed-cell aluminum metal foams

Nisa

Pandey

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Materials scientists and engineers have been trying to create porous metals and metal foams for many years. Naturally occurring porous materials such as bone, coral, cork, balsa wood, etc., are responsible for initiating research in the area of producing porous metals and metal foams. Metal foam is a cellular structure made up of a solid metal-containing a large volume fraction of gas-filled pores. These pores can either be sealed (closed-cell foam), or they can be an interconnected network (open-cell foam). The closed-cell foam is referred to as metal foams, while the open-cell foam is referred to simply as porous metal. Some of the key properties of the metal foam are, ultra-light material (75–95% of the volume consists of void spaces), very high porosity, and high compression strengths combined with good energy absorption characteristics. This paper provides a comprehensive review of mechanical characterizations of closed-cell aluminum metal foams (CCAFs) or porous aluminum alloys, the trends in their mechanical behavior specifically their compressive performance. The significant factors influencing this behavior are intricately studied in light of the available literature. The aim of this work is to facilitate a channelized development over the past few decades in the field of mechanical behavior of CCAF that may be of help to the researchers, academicians, and industries for the critical understanding of the failure criteria and mechanical properties of closed-cell aluminum metal foams.

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“…Data on the influence of the SiC concentration on strength are absent. Another approach to influence the microstructure of aluminum foams is the addition of aluminum powder in the melt before the foaming [6]. As is known, the surfaces of aluminum particles are covered with a thin layer of aluminum oxide.…”

Section: Introductionmentioning

confidence: 99%

Al and A356 Alloy Foam Castings Modified with Low Concentrations of Nano-Sized Particles: Structural Study and Compressive Strength Tests

Dimitrova,

Simeonova,

Krastev

et al. 2024

Metals

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Aluminum and A356 alloy foam castings are produced using a melt-foaming method. Prior to foaming, the melt is modified with nano-sized particles (SiC, TiN, or Al2O3). The nano-sized particles are mixed with micro-sized Al particles, which are ultrasonically treated and hot-extruded. Thus, the so-called “modifying nano-composition” is obtained. The resulting compositions are introduced into the melt of the Al foam at the following mass concentrations of nanoparticles: SiC: 0.038 wt. %; TiN: 0.045 wt. %; and Al2O3: 0.046 wt. %. For the A356 foam, we use the following concentrations: SiC: 0.039 wt. %; TiN: 0.052 wt. %; and Al2O3: 0.086 wt. %. The macrostructure of the foam castings is investigated by CT scanning and 3D analysis. The pore size distributions and accumulative fraction dependencies are determined for all samples. The microstructure of the foam castings is investigated by SEM-EDS analysis. The results confirmed the presence of individual nano-sized particles, as well as clusters of particles in foam walls. The conducted compression tests show a significant increase in the plateau stress (up to 237%) of the modified aluminum foam castings compared to non-modified castings. However, a similar effect of the nano-compositions on A356 alloy foam castings is not observed. The obtained results show that the above-indicated concentrations of nanoparticles can positively influence the mechanical properties of aluminum foam castings. The novelty of the current study is two-fold: (1) such low concentrations of added nanoparticles have never been used before to alter Al foam’s properties, and (2) an original method of introducing the nanoparticles into the melt is applied in the form of nano-compositions.

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Foam stabilization by aluminum powder

Cited by 17 publications

References 17 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

A review of the compressive properties of closed-cell aluminum metal foams

Al and A356 Alloy Foam Castings Modified with Low Concentrations of Nano-Sized Particles: Structural Study and Compressive Strength Tests

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