The mechanical properties of expanded perlite-aluminium syntactic foam at elevated temperatures

Taherishargh, M.; Linul, Emanoil; Broxtermann, S.; Fiedler, Thomas

doi:10.1016/j.jallcom.2017.12.083

Cited by 89 publications

(41 citation statements)

References 20 publications

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“…In order to control the scatter in the mechanical properties of the MMSFs, the investigations turned to the more precise hollow spheres including pure alumina [33][34][35][36], silicon carbide [37,38] or some kind of metal, mainly steels [39][40][41]. Later, alternative filler materials such as expanded perlite [42][43][44][45][46][47][48][49] or pumice [50] have been investigated in order to decrease the costs of the MMSFs.…”

Section: Introductionmentioning

confidence: 99%

Compressive characteristics of bimodal aluminium matrix syntactic foams

Orbulov

Kemény

Filep

et al. 2019

Composites Part A: Applied Science and Manufacturing

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High performance metal matrix syntactic foams (MMSFs) have been produced by liquid state infiltration of AlSi12 alloy into two loosely packed sets of different nominal diameter (150 μm and 1500 μm) oxide hollow spheres (CHSs) and their mixed packs. The structure of the MMSFs has been studied by X-ray computer tomography and microscopy. The mechanical properties were mapped by compressive tests. The structural investigations showed proper infiltration. In the case of pure small and large CHS filler, the compressive tests revealed high strength levels all over the deformation of the materials up to 50% compressive strain, with the dominance (higher strength values) of the smaller CHSs filled MMSFs. In the case of bimodal CHS filling, the compressive features of the MMSFs have been mixed with two local peaks corresponding to the failure of the smaller and larger CHS filled MMSFs. Rule of mixtures is applicable to estimate the compressive strength.

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Section: Introductionmentioning

confidence: 99%

Compressive characteristics of bimodal aluminium matrix syntactic foams

Orbulov

Kemény

Filep

et al. 2019

Composites Part A: Applied Science and Manufacturing

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“…To prevent any oxidation of metal matrix, assembling components and fillers, the chamber can be subjected to a vacuum (10 −4 MPa) followed by purging with controlled atmosphere of inert gas (Argon [2,23,40]). The chamber with the assembly inside (depicted in Figure 2) is heating from room temperature until or above the melting point of matrix metal is reached and held at this temperature during a period for homogenization (usually 20-30 min) [4,45,94]. After this period, the assembly is removed from the chamber.…”

Section: Counter-gravity Pressure Infiltration Mechanically Assisted mentioning

confidence: 99%

“…The conversion of bulk metals into a cellular shape, i.e., the invention of foams, has been driven by the need to achieve lightweight engineering materials with increased specific strength, high damping, exceptional energy absorbing capabilities [2] and high thermal isolation [3]. Due to their good temperature resistance, metal foams offer exceptional potential to be applied in highly aggressive environments, such as cooling systems and heat shielding in power generation or transportation [4]. Nonetheless, the physical and mechanical properties of metal foams are mainly governed by its inner structure.…”

Section: Introductionmentioning

confidence: 99%

“…The desire to reduce production costs and tune the properties of metal foams promoted the development of metal matrix syntactic foams (MMSF) [2]. Metallic syntactic foams are mainly closed-cell porous solids where the porosity is introduced by hollow or porous heat resistant permanent particles (fillers or space holders) dispersed in a metallic matrix [4]. The porosity inside the fillers provides these materials with a closed-cell structure and makes them lightweight compared to the bulk matrix…”

Section: Introductionmentioning

confidence: 99%

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Molten Metal Infiltration Methods to Process Metal Matrix Syntactic Foams

S-de-la-Muela

Cambronero

Ruiz‐Román

2020

Metals

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Metal matrix syntactic foams (MMSF) are foam composites obtained by filling hollow and/or porous particles into a metal matrix. MMSF are promising materials in defense, aerospace, automotive, marine and engineering applications. Mechanical and physical properties of MMSF can be tailored to reach better structural and/or functional behaviors by fitting processing and tailoring parameters. Some of these parameters are: reinforcement size, volume fraction, distribution of reinforcements and chemical composition. Three techniques are available to manufacture MMSF: Stir casting/vortex method (SC), powder metallurgy (P/M) and infiltration routes. Infiltration process is by far the main employed for making MMSF, it allows a large range of reinforcement (30 vol % to 78 vol %) and offers great advantages compared to other techniques. This paper reviews infiltration routes used to date, their advantages and drawbacks, the main processing parameters of each route, and a relation of representative studies developed to date on the synthesizing of MMSF by molten infiltration processes.

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“…In these porous materials the porosity is ensured by incorporating either ceramic or metallic hollow spheres [9]. The influence of different hollow spheres and structures at different conditions and temperatures on mechanical properties was investigated by Movahedi et al [10], Zhao et al [11], Taherisharg et al [12] and Linul et al [13].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Machining Parameters on the Surface Porosity of a Closed-Cell Aluminium Foam

Razboršek¹,

Gotlih²,

Karner³

et al. 2019

SV-JME

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Aluminium foam elements foamed into moulds, have a porous core, surrounded by a thin layer of non-porous outer surface. This layer affects the homogeneity and mechanical properties of the element significantly. To produce functional elements, the foams can be machined to a desired end shape. Machining deforms the surface structure, which results in a reduction of strength properties. This article describes an experimental approach to determine the effects of machining parameters on the surface porosity of closed-cell aluminium foam samples. The samples were machined by incremental forming and friction rolling with precisely defined processing parameters (deformation depth, feed rate and spindle speed). High-resolution digital photos of the treated surfaces were taken and analysed using image segmentation with a multispectral threshold algorithm. The change of surface porosity was calculated for each sample, and the influence of the selected machining parameters was determined by the use of response surface methodology. The optimal machining parameters are presented.

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The mechanical properties of expanded perlite-aluminium syntactic foam at elevated temperatures

Cited by 89 publications

References 20 publications

Compressive characteristics of bimodal aluminium matrix syntactic foams

Compressive characteristics of bimodal aluminium matrix syntactic foams

Molten Metal Infiltration Methods to Process Metal Matrix Syntactic Foams

The Influence of Machining Parameters on the Surface Porosity of a Closed-Cell Aluminium Foam

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