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Materials with complex inner structure can be challenging to characterize inan effective way. First, it is difficult to determine the representative volumefor such a heterogeneous material. Second, the effective material parameterssignificantly depend on the structure, and thus on the interface properties. Inthe present paper, we focus on composite metal foams, and we attempt todetermine the effective thermal parameters. We use the heat pulse experiment tostudy its transient thermal response. We observed deviation from Fourier's law,and thus we propose an evaluation procedure for such experimental data usingthe Guyer--Krumhansl heat equation. Furthermore, we studied the effectiveparameters, the specific heat, mass density, thermal conductivity and thermaldiffusivity, and we propose a method for deducing a more reliable thermaldiffusivity and thermal conductivity based on the transient temperaturehistory.

Thermal and mechanical properties of AlSi7Mg matrix syntactic foams reinforced by Al$_2$O$_3$ or SiC particles in matrix