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Springer Nature [academic journals on nature.com], NPG Asia Materials, 1(13), 2021

DOI: 10.1038/s41427-021-00306-y

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Hollow medium-entropy alloy nanolattices with ultrahigh energy absorption and resilience

Journal article published in 2021 by James Utama Surjadi ORCID, Xiaobin Feng, Rong Fan, Weitong Lin ORCID, Xiaocui Li, Yang Lu ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractHollow micro/nanolattices have emerged in recent years as a premium solution compared to conventional foams or aerogels for mechanically robust lightweight structures. However, existing hollow metallic micro/nanolattices often cannot exhibit high toughness due to the intrinsic brittleness from localized strut fractures, limiting their broad applications. Here, we report the development of hollow CoCrNi medium-entropy alloy (MEA) nanolattices, which exhibit high specific energy absorption (up to 25 J g−1) and resilience (over 90% recoverability) by leveraging size-induced ductility and rationally engineered MEA microstructural defects. This strategy provides a pathway for the development of ultralight, damage-resistant metallic metamaterials for a myriad of structural and functional applications.