Exceptionally strong and ductile bulk metallic glass composite with bioinspired architecture mimicking porcupine fish spine  

作　　者：Xiangcheng Cui Qianyu Jiao Weiqi Wang Long Zhang Yunzhuo Lu 

机构地区：[1]School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China [2]Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

出　　处：《Journal of Materials Science & Technology》2024年第28期22-28,共7页材料科学技术(英文版)

基　　金：supported by the National Key Research and Development Program of China under Grant No.2023YFB3408101;the National Natural Science Foundation of China under Grant Nos.52171164 and 52271022;the Youth Innovation Promotion Association CAS(No.2021188).

摘　　要：Introducing soft crystalline phases into the glassy matrix to produce bulk metallic glass composites(BMGCs)is an effective way to enhance the ductility of bulk metallic glasses(BMGs).However,the introduction of soft crystalline phases severely sacrifices the strength,resulting in the strength-ductility trade-off.To defeat this dilemma,here,we successfully fabricate a bioinspired BMGC with architecture mimicking a porcupine fish spine.The bioinspired BMGC shows a pronounced yield strength of∼800 MPa with an excellent fracture strain of∼35%.The fabrication of the bioinspired BMGC is achieved through infiltration and vitrification of molten Zr50 Ti5 Cu27 Ni10 Al8(Zr50)melt into the crystalline Nb skeleton fabricated by laser additive manufacturing(LAM).Such enhanced strength-ductility synergy is attributed to the asynchronous deformation associated with the delicate bioinspired heterogeneous architecture.The bioinspired structural design motif,enabled by the combination of LAM and infiltration casting technologies,opens a new window to develop high-performance BMGCs on a large scale for structural applications.

关 键 词：Bulk metallic glass composite Bioinspired structure Strength Ductility 

分 类 号：TG1[金属学及工艺—金属学]