Centimetre-scale crack-free self-assembly for ultra-high tensile strength metallic nanolattices
Centimetre-scale crack-free self-assembly for ultra-high tensile strength metallic nanolattices
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DOI：
10.1038/s41563-021-01039-7
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发表时间：
2021-06-17
期刊：
影响因子：
41.2
通讯作者：
Pikul, James H.
中科院分区：
文献类型：
--
作者：
Jiang, Zhimin;Pikul, James H.
采用无裂纹自组装方法制备了前所未有的金属纳米晶格。致密的纳米结构使得抗拉强度接近理论极限。纳米晶格表现出吸引人的机械、能量转换和光学特性，但在制造大型纳米晶格的同时保持其致密的规则纳米特征是具有挑战性的。在这里，我们报告了一种无裂纹自组装方法，用于制造厘米尺度的镍纳米晶格，其无裂纹区域比先前的自组装纳米晶格大得多，并且比三维打印的纳米晶格有更多的单元格。这些镍纳米晶格的特征尺寸为100 nm，晶粒尺寸为30 nm，抗拉强度为260 MPa，接近多孔镍的理论强度极限。本文所报道的自组装方法和多孔金属力学可以促进高强度多功能多孔材料的制备和应用。
Metal nanolattices are fabricated at an unprecedented scale by using a crack-free self-assembly method. The dense nanostructures enable tensile strengths that approach the theoretical limit.Nanolattices exhibit attractive mechanical, energy conversion and optical properties, but it is challenging to fabricate large nanolattices while maintaining the dense regular nanometre features that enable their properties. Here we report a crack-free self-assembly approach for fabricating centimetre-scale nickel nanolattices with much larger crack-free areas than prior self-assembled nanolattices and many more unit cells than three-dimensionally printed nanolattices. These nickel nanolattices have a feature size of 100 nm, a grain size of 30 nm and a tensile strength of 260 MPa, which approaches the theoretical strength limit for porous nickel. The self-assembly method and porous metal mechanics reported in this work may advance the fabrication and applications of high-strength multifunctional porous materials.