The microscopic Bouligand-type architectures of fish scales demonstrate a notable efficiency in enhancing the damage tolerance of materials;nevertheless,it is challenging to reproduce in metals.Here bioinspired tungsten-copper composites with different Bouligand-type architectures mimicking fish scales were fab-ricated by infiltrating a copper melt into woven contextures of tungsten fibers.These composites exhibit a synergetic enhancement in both strength and ductility at room temperature along with an improved resistance to high-temperature oxidization.The strengths were interpreted by adapting the classical lam-inate theory to incorporate the characteristics of Bouligand-type architectures.In particular,under load the tungsten fibers can reorient adaptively within the copper matrix by their straightening,stretching,interfacial sliding with the matrix,and the cooperative kinking deformation of fiber grids,representing a successful implementation of the optimizing mechanisms of the Bouligand-type architectures to enhance strength and toughness.This study may serve to promote the development of new high-performance tungsten-copper composites for applications,e.g.,as electrical contacts or heat sinks,and offer a viable approach for constructing bioinspired architectures in metallic materials.

Yuan Zhang;Guoqi Tan;Mingyang Zhang;Qin Yu;Zengqian Liu;Yanyan Liu;Jian Zhang;Da Jiao;Faheng Wang;Longchao Zhuo;Zhefeng Zhang;Robert O.Ritchie

Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China;Department of Materials Science and Engineering,University of California Berkeley,Berkeley,CA,94720,USA;Jihua Laboratory,Foshan 528200,China;School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,China

材料科学技术（英文版）

[1]Yuan Zhang;Guoqi Tan;Mingyang Zhang;Qin Yu;Zengqian Liu;Yanyan Liu;Jian Zhang;Da Jiao;Faheng Wang;Longchao Zhuo;Zhefeng Zhang;Robert O.Ritchie-.Bioinspired tungsten-copper composites with Bouligand-type architectures mimicking fish scales)[J].材料科学技术（英文版）,2022(01):21-30

contextures,inate,reorient

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