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<p>Bulk mechanical energy-absorbing materials are critically needed for various engineering applications. However, existing state-of-the-art materials face significant limitations: architected systems such as 3D-printed nano- and micro-lattices suffer from scalability constraints, while conventional foams often exhibit a strength-ductility trade-off that limits energy absorption. Here, we overcome these challenges by fabricating bulk architected alloys via electrochemical dealloying of a machine learning-identified compositionally complex spinodal alloy. These materials display a hierarchical structural architecture spanning seven orders of magnitude – from atomic-scale lattice distortion, nanoscale precipitates and amorphous oxide layers, microscale ligaments, to macroscale network dimensions. This multi-scale integration enables synergistic deformation mechanisms, yielding energy absorption capacities of ~106 MJ/m<sup>3</sup> in bulk and ~ 305 MJ/m<sup>3</sup> in micro-samples. Crucially, this enhanced performance is retained from room temperature to 873 K. Our approach provides an effective strategy for designing scalable, high-performance architected materials for demanding condition energy absorption.</p>

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Bulk spinodal-architected compositionally complex alloy with enhanced energy absorption across a wide temperature range

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月28日

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  • Hao Gong,
  • Yushan Geng,
  • Qing Wang,
  • Zhaoqi Chen,
  • Baisong Guo,
  • Zhixin Li,
  • Sijia Hu,
  • Anding Wang,
  • Yong Yang

摘要

Bulk mechanical energy-absorbing materials are critically needed for various engineering applications. However, existing state-of-the-art materials face significant limitations: architected systems such as 3D-printed nano- and micro-lattices suffer from scalability constraints, while conventional foams often exhibit a strength-ductility trade-off that limits energy absorption. Here, we overcome these challenges by fabricating bulk architected alloys via electrochemical dealloying of a machine learning-identified compositionally complex spinodal alloy. These materials display a hierarchical structural architecture spanning seven orders of magnitude – from atomic-scale lattice distortion, nanoscale precipitates and amorphous oxide layers, microscale ligaments, to macroscale network dimensions. This multi-scale integration enables synergistic deformation mechanisms, yielding energy absorption capacities of ~106 MJ/m3 in bulk and ~ 305 MJ/m3 in micro-samples. Crucially, this enhanced performance is retained from room temperature to 873 K. Our approach provides an effective strategy for designing scalable, high-performance architected materials for demanding condition energy absorption.