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Materials 2015, 8(11), 7926-7937; doi:10.3390/ma8115432

Compressive Behavior and Microstructural Characteristics of Iron Hollow Sphere Filled Aluminum Matrix Syntactic Foams

1
Department of Materials Science and Engineering, Műegyetem rakpart 3, Budapest 1111, Hungary
2
MTA–BME Research Group for Composite Science and Technology, Műegyetem rakpart 3, Budapest 1111, Hungary
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Sven de Schampheleire
Received: 21 October 2015 / Revised: 14 November 2015 / Accepted: 17 November 2015 / Published: 23 November 2015
(This article belongs to the Special Issue Metal Foams: Synthesis, Characterization and Applications)
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Abstract

Iron hollow sphere filled aluminum matrix syntactic foams (AMSFs) were produced by low pressure, inert gas assisted infiltration. The microstructure of the produced AMSFs was investigated by light and electron microscopy, extended by energy dispersive X-ray spectroscopy and electron back-scattered diffraction. The investigations revealed almost perfect infiltration and a slight gradient in the grain size of the matrix. A very thin interface layer that ensures good bonding between the hollow spheres and the matrix was also observed. Compression tests were performed on cylindrical specimens to explore the characteristic mechanical properties of the AMSFs. Compared to other (conventional) metallic foams, the investigated AMSFs proved to have outstanding mechanical properties (yield strength, plateau strength, etc.) and energy absorbing capability. View Full-Text
Keywords: metal matrix composites; cellular materials; metallic foams; syntactic foams; hollow sphere; mechanical characterization; compression; microstructure; electron back-scattered diffraction; energy dispersive spectroscopy metal matrix composites; cellular materials; metallic foams; syntactic foams; hollow sphere; mechanical characterization; compression; microstructure; electron back-scattered diffraction; energy dispersive spectroscopy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Szlancsik, A.; Katona, B.; Májlinger, K.; Orbulov, I.N. Compressive Behavior and Microstructural Characteristics of Iron Hollow Sphere Filled Aluminum Matrix Syntactic Foams. Materials 2015, 8, 7926-7937.

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