The electronic structure origin for ultrahigh glass-forming ability of the FeCoCrMoCBY alloy system

摘要

The authors report the effect of the addition of cobalt on glass-forming ability (GFA) in Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses using Raman scattering and x-ray photoelectron spectroscopy. Among the alloy system, the alloy with 7% Co displays a unique electronic structure including the minimum core-level binding energy and the maximum Raman peak frequency. The origin of the superhigh GFA for the 7% Co alloy is discussed in terms of its unique electronic structure that leads to the densest atomic packing and strongest directional bonds.