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<p>The variability of the thickness as well as the thermal conductivity of interfaces in composites may
significantly influence thermal transport characteristics and the notion of a metamaterial as an
effective medium. The consequent modulations of the heat flux passage are analytically and
experimentally examined through a non-contact methodology using radiative imaging, on a model
anisotropic thermal metamaterial. It was indicated that a lower Al layer/silver interfacial epoxy ratio of ~25 compared to that of a Al layer/alumina interfacial epoxy (of ~39) contributes to a
smaller deviation of the heat flux bending angle. </p>
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