New Aluminum Syntactic Foam: Synthesis and Mechanical Characterization

Metal matrix syntactic foams (MMSF) are advanced cellular materials constituted by a system of a minimum of two phases, in which a dispersion of hollow particles is embedded by a continuous metal matrix. The incorporation of porous fillers favors the development of low-density materials with excepti...

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Veröffentlicht in:Materials 2022-08, Vol.15 (15), p.5320
Hauptverfasser: Sánchez de la Muela, A. M., García Cambronero, L. E., Malheiros, L. F., Ruiz-Román, J. M.
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container_issue 15
container_start_page 5320
container_title Materials
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creator Sánchez de la Muela, A. M.
García Cambronero, L. E.
Malheiros, L. F.
Ruiz-Román, J. M.
description Metal matrix syntactic foams (MMSF) are advanced cellular materials constituted by a system of a minimum of two phases, in which a dispersion of hollow particles is embedded by a continuous metal matrix. The incorporation of porous fillers favors the development of low-density materials with exceptional behavior for damping vibrations, impacts, and blast effects, shielding acoustic, thermal, and electromagnetic energies. There are three main techniques to produce them: infiltration casting technique (ICT), stir casting technique (SCT), and powder metallurgy technique (P/M). The first two techniques are used for embedding filler into lower melting point metallic matrices than fillers, in contrast to P/M. The present study demonstrates the feasibility of producing MMSF with components of similar melting points by ICT. The fillers were synthesized in-situ with aluminum and a natural foaming agent from wastes of Spanish white marble quarries. These novel aluminum syntactic foams (ASF) were mechanically characterized following the ISO-13314 and exhibited a porosity, plateau stress, and energy absorption capacity of 41%, 37.65 MPa, 8.62 MJ/m3 (at 35% of densification), respectively. These properties are slightly superior to equal porosity LECA ASF, making these novel ASF suitable for the same applications as LECA-ASF.
doi_str_mv 10.3390/ma15155320
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subjects Alloys
Aluminum
Damping
Densification
Embedding
Energy
Energy absorption
Feasibility studies
Fillers
Foamed metals
Foaming agents
Low carbon steel
Low density materials
Mechanical properties
Melting points
Morphology
Porosity
Porous media
Powder metallurgy
Quarries
Syntactic foams
title New Aluminum Syntactic Foam: Synthesis and Mechanical Characterization
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