Mechanical property dependence on compositional heterogeneity in Co-P metallic nanoglasses

Tian Li, Nana Li, Shengming Zhang, Guangping Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The glass–glass interfaces (GGIs) are in a unique glass phase, while current knowledge on the interfacial phase has not completely established to explain the unprecedented improvements in the ductility of metallic nanoglasses (NGs). In this work, Co–P NGs prepared through the pulse electrodeposition are investigated, whose GGI regions clearly show elemental segregation with chemical composition dominated by element Co. Such compositional heterogeneity is further verified by molecular dynamics (MD) simulation on the formation of GGIs in Co-P NGs and atomic structures of GGIs with Co segregation are found to be less dense than those of glassy grains. More importantly, Co segregation at GGIs is closely related to the improved ductility observed in Co-P NGs, as demonstrated by nanoindentation measurements and MD simulations. This work facilitates the understanding on the relations between compositional heterogeneity and improved ductility as observed in Co-P NGs, and thus opens a new window for controlling the mechanical properties of NGs through GGI engineering.

Original languageEnglish
Article number7458
JournalScientific Reports
Volume14
Issue number1
DOIs
Publication statusPublished - Dec 2024

Keywords

  • Glass–glass interfaces
  • Metallic nanoglasses
  • Molecular dynamics
  • Nanoindentation
  • Plastic deformation

ASJC Scopus subject areas

  • General

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