Local structure investigation of Co–Fe–Si–B ribbons by extended X-ray absorption fine-structure spectroscopy

In the present work, extended X-ray absorption fine-structure (EXAFS) investigations of Co 69 Fe x Si 21– B 10 ( = 3, 5, 7) glassy ribbons were performed at K -edge. The magnitude first peak Fourier transforms EXAFS signals is found to increase monotonically with increasing concentrations indicating formation localized ordered structure atomic scale. Co–Si coordination number (CN) increases expense CN Co/Fe. Smaller interatomic distances are observed in phase compared that crystalline which promotes stability phase. Calculations thermodynamic parameter P HSS ), cohesive energy E C ) and radius difference (δ) show alloy composition 3 18 has a good glass-forming ability (GFA) highest other compositions. A linear correlation GFA exists also plays crucial role alloys. This should be considered developing different criteria.