Low-density expanded perlite-aluminium syntactic foam

Taherishargh, M.; Belova, I. V.; Murch, G. E.; Fiedler, T.

Title: Low-density expanded perlite-aluminium syntactic foam
Creator: Taherishargh, M.; Belova, I. V.; Murch, G. E.; Fiedler, T.
Relation: Materials Science and Engineering: A Vol. 604, p. 1227-134
Publisher Link: http://dx.doi.org/10.1016/j.msea.2014.03.003
Publisher: Elsevier
Resource Type: journal article
Date: 2014
Description: This paper addresses an innovative syntactic foam (SF) formed by counter-gravity infiltration of a packed bed of low-cost expanded perlite (EP) particles with molten A356 aluminium. The uniform distribution of EP particles in foams causes an even density throughout the height. Due to the low density (~0.18 g/cm3) of EP, the average density of these foams is only 1.05 g/cm3 which is considerably lower than most studied SFs. Owing to the high porosity of the filler material (~94%), the total porosity of the new foam reaches 61%. Microstructural observations reveal no sign of damage or unintended EP particle infiltration. EP shows a good wettability whilst essentially no reaction occurs at the EP–metal interface. Under compression, EP/A356 syntactic foam shows stress–strain curves consisting of elastic, plateau and densification regions. On account of its consistent plateau stress (average value 30.8 MPa), large densification strain (almost 60%), and high energy absorption efficiency (88%) EP/A356 syntactic foam is an effective energy absorber.
Subject: syntactic foam; expanded perlite; infiltration; mechanical characterization; electron microscopy
Identifier: http://hdl.handle.net/1959.13/1047738
Identifier: uon:14824
Identifier: ISSN:0921-5093
Language: eng
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