Bioinspired tungsten-copper composites with Bouligand-type architectures mimicking fish scales  

作　　者：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 

机构地区：[1]Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China [3]Department of Materials Science and Engineering,University of California Berkeley,Berkeley,CA,94720,USA [4]Jihua Laboratory,Foshan 528200,China [5]School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China

出　　处：《Journal of Materials Science & Technology》2022年第1期21-30,共10页材料科学技术（英文版）

基　　金：the financial support by the National Key R&D Program of China under grant number 2020YFA0710404;the National Natural Science Foundation of China under grant number 51871216;the KC Wong Education Foundation(GJTD-2020-09);the Liao Ning Revitalization Talents Program;the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials at Donghua University;the Opening Project of Jiangsu Province Key Laboratory of High-End Structural Materials under grant number hsm1801;the Youth Innovation Promotion Association CAS;support from the Multidisciplinary University Research Initiative to University of California Riverside,funded by the Air Force Office of Scientific Research(AFOSR-FA9550–15–1–0009)and subcontracted to the University of California Berkeley。

摘　　要：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 fabricated 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 laminate 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.

关 键 词：Bouligand structure Tungsten-copper composites Fish scales Structural reorientation Bioinspired designs 

分 类 号：TB331[一般工业技术—材料科学与工程]