Next Article in Journal
BiCuSeO Thermoelectrics: An Update on Recent Progress and Perspective
Previous Article in Journal
Microstructural Characterization of Melt Extracted High-Nb-Containing TiAl-Based Fiber
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Materials 2017, 10(2), 196;

The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression

Department of Materials Physics, Loránd Eötvös University, Pázmány P. stny. 1/A, Budapest H-1117, Hungary
Department of Physics of Materials, Charles University, Ke Karlovu 5, Prague 2 121 16, Czech Republic
Author to whom correspondence should be addressed.
Academic Editor: Thomas Fiedler
Received: 6 January 2017 / Revised: 6 February 2017 / Accepted: 14 February 2017 / Published: 17 February 2017
Full-Text   |   PDF [10496 KB, uploaded 17 February 2017]   |  


The influence of the matrix material on the deformation and failure mechanisms in metal matrix syntactic foams was investigated in this study. Samples with commercially pure Al (Al) and Al-12 wt % Si (AlSi12) eutectic aluminum matrix, reinforced by hollow ceramic spheres, were compressed at room temperature. Concurrently, the acoustic emission response and the strain field development on the surface were monitored in-situ. The results indicate that the plastic deformation of the cell walls is the governing mechanism in the early stage of straining for both types of foams. At large stresses, deformation bands form both in the Al and AlSi12 foam. In Al foam, cell walls collapse in a large volume. In contrast, the AlSi12 foam is more brittle; therefore, the fracture of precipitates and the crushing of the matrix take place within a distinctive deformation band, along with an occurrence of a significant stress drop. The onset stress of ceramic sphere failure was shown to be not influenced by the matrix material. The in-situ methods provided complementary data which further support these results. View Full-Text
Keywords: syntactic foams; acoustic emission; mechanical properties syntactic foams; acoustic emission; mechanical properties

Figure 1

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).

Supplementary material


Share & Cite This Article

MDPI and ACS Style

Kádár, C.; Máthis, K.; Knapek, M.; Chmelík, F. The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression. Materials 2017, 10, 196.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top