Structural mechanism for ultrahigh-strength Co-based metallic glasses

X. Hui, D. Y. Lin, X. H. Chen, W. Y. Wang, Y. Wang, S. L. Shang, Z. K. Liu

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The atomic packing and electronic structure for Co43Fe 20Ta5.5B31.5 metallic glass (MG) were explored by extended X-ray absorption fine structure measurement and first-principles calculation. It is shown that the short-range order in this MG is of a (Co, Fe)B2-like, but not (Co, Fe)23B6-like, crystallographic structure. A network-like medium-range order can be formed via the build-up of B-centered Z9 〈0, 3, 6, 0〉 Voronoi polyhedra. The intrinsic strengthening mechanism is attributed to the formation of strong covalent bonding between B and Co (Fe).

Original languageEnglish (US)
Pages (from-to)257-260
Number of pages4
JournalScripta Materialia
Volume68
Issue number5
DOIs
StatePublished - Mar 1 2013

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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