Abstract
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 in-troduction 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 Zr50Ti5Cu27Ni10Al8(Zr50)melt into the crystalline Nb skeleton fab-ricated 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 technolo-gies,opens a new window to develop high-performance BMGCs on a large scale for structural applica-tions.
基金项目
National Key Research and Development Program of China(2023YFB3408101)
National Natural Science Foundation of China(52171164)
National Natural Science Foundation of China(52271022)
Youth Innovation Promotion Association CAS(2021188)
NETL
NSTL
万方数据