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Erica Lilleodden1

1, Helmholtz-Zentrum Geesthacht, Geesthacht, , Germany

Nanoporous gold (npg), a nanostructured bicontinuous network structure fabricated via electrochemical dealloying offers a unique combination of tailorable strength and functionality. The mechanical behavior of npg has been shown to be strongly dependent on its average ligament width, with local stresses in the as-dealloyed material approaching the theoretical strength of gold, underscoring the “smaller is stronger” paradigm. Yet strong deviations from classical laws for cellular structures have been found for npg, pointing to the need for a more detailed investigation of the 3D network structure, and a better understanding of the evolution of structural characteristics resulting from coarsening. Here we present and discuss results from high-resolution tomographic characterization, in situ micromechanical testing, and microLaue diffraction in terms of the underlying structure-property relations and mechanisms of deformation of this unique hybrid material.

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