Articles written in Bulletin of Materials Science

    • Nanoindentation for mechanical behaviour characterization of nanoporous silver fabricated through dealloying


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      Nanoporous silver fabricated by dealloying can be a promising material in many potential applications due to its distinctive physical and chemical characteristics. For making it widely used in actual production, mechanical properties of nanoporous silver with an open sponge-like morphology of interconnecting ligaments on the nanometre length scale have been investigated by nanoindentation, combined with scanning electron microscopy characterization. Both the hardness and elastic modulus present a decreasing tendency along with increase in ligament size. The individual ligaments near the cracks underwent intense plastic deformation before rupture. As the scaling laws cannot be used to estimate the variation of mechanical properties with the ligaments coarsening, a scaling relation for the yield strength of nanoporous silver by incorporating the ligament size is proposed, which can be used to estimate the yield strength of nanoporous silver with different ligament sizes. Finally, the influence of ligament size on mechanical properties is discussed.

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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