The red deer antler:Bioinspired design of an Al-Si composite with a fenestrated network-particle structure

查看全文 作　　者：Zhe [1,3]Wang;Yanjun [2]Zhang;Song [5]Jiang;Jun [1]Wang;Dan [1]Du;Xueliang [4]Wang;Yaping [3]Wang

机构地区：[1]School of Materials Science and Engineering,Xi’an Polytechnic University,Xi’an,710048,China;[2]School of Architectural and Surveying Engineering,Shanxi Datong University,Datong,037003,China;[3]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter,School of Science,Xi’an Jiaotong University,Xi’an,710049,China;[4]MOE Key Laboratory of Thermo-Fluid Science and Engineering,School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an,Shaanxi,710049,China;[5]School of Resources Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi,710055,China

出　　处：《Journal of Materiomics》索引2020年第6卷第3期,共12页

基　　金：supported by the financial support of the National Science Foundation of China(No.51607132 and No.51906189);the National Science Foundation of Shaanxi(No:2019JQ-842). 摘　　要：Conventional Al-Si materials always have a coarse and discontinuous Si structure,which limits their application as thermal management materials.Fortunately,nature has evolved efficient strategies to form complex microstructures that exhibit excellent wear resistance and thermal properties;one such example is found in the red deer antler.Here,inspired by the antler structure,AleSi composites with a novel fenestrated network-particle structure(F-N)and with a common isolated island structure(I-I)are designed and prepared.Subsequently,the dynamic formation of F-N is tracked and studied using computational fluid dynamics(CFD)simulation.To investigate the reinforcement mechanisms of F-N,the wear resistances and thermal properties of F-N and I-I are compared and analyzed.Simulation and experimental results show that the reconstruction of a semi-continuous structure promotes the formation of a striated structure,whereas flowing Si particles provide some sites for the formation of the fenestrated structure.The dynamic formation of F-N is strongly influenced by the convectionediffusion process and the flow path.Moreover,this biomimetic F-N structure exhibits better wear resistance and thermal properties than I-I,owing to its strong structural support and high expansion resistance.This work is expected to provide new perspectives on the microstructural design of thermal management materials with good wear resistance. 关键词：Al-Si materials Dynamic evolution Wear properties Thermal properties Continuity coefficient

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The red deer antler:Bioinspired design of an Al-Si composite with a fenestrated network-particle structure

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