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<p>Metallic nanosponges are well known to exhibit distinct mechanical properties that are considered to originate from the interwoven mechanics of the nanoscale ligaments as individual units and as a network. A comprehensive understanding of the physical mechanisms behind these properties spanning over several length scales is to date lacking. Here, by employing a correlative and scale-bridging workflow combining non-destructive 3D electron and X-ray tomography, in situ mechanics and experimentally-informed real-size modelling, we reveal the atomic origins of size dependent deformation mechanisms of nanoporous gold ranging from sub-ten to hundreds of nanometers. A realistic distribution of geometries and sizes of the ligaments appears to be crucial to accurately capture the mechanical response of nanoporous gold, including deformation gradients and plasticity. Our workflow demonstrates the potential for exploring the atomistic mechanisms of material plasticity with geometrical complexity.</p><p></p>

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Revealing nanoscale plasticity of metallic nanosponges with correlative and scale-bridging 3D microscopy and modelling

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月15日

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  • Thomas Przybilla,
  • Zhuocheng Xie,
  • Aruna Prakash,
  • Erich Thiess,
  • Florian Niekiel,
  • Benjamin Apeleo Zubiri,
  • Mirza Mačković,
  • Peter Schweizer,
  • Julien Guénolé,
  • Stephen T. Kelly,
  • Hrishikesh A. Bale,
  • Dong Wang,
  • Stefan Sandfeld,
  • Erik Bitzek,
  • Erdmann Spiecker

摘要

Metallic nanosponges are well known to exhibit distinct mechanical properties that are considered to originate from the interwoven mechanics of the nanoscale ligaments as individual units and as a network. A comprehensive understanding of the physical mechanisms behind these properties spanning over several length scales is to date lacking. Here, by employing a correlative and scale-bridging workflow combining non-destructive 3D electron and X-ray tomography, in situ mechanics and experimentally-informed real-size modelling, we reveal the atomic origins of size dependent deformation mechanisms of nanoporous gold ranging from sub-ten to hundreds of nanometers. A realistic distribution of geometries and sizes of the ligaments appears to be crucial to accurately capture the mechanical response of nanoporous gold, including deformation gradients and plasticity. Our workflow demonstrates the potential for exploring the atomistic mechanisms of material plasticity with geometrical complexity.