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The authors report the effect of cobalt addition on the glass-forming ability (GFA) in Fe-Co-Cr-Mo-C-B-Y bulk metallic glasses (BMGs) by using Mössbauer experiments. Among the studied Fe-based alloy system, the alloy with 7% Co (Co7 alloy) displays the largest electronic quadrupole splitting. The origin of the superhigh GFA for the Co7 alloy was discussed in terms of its spatially homogeneous distribution...
Here, the authors focus on the relationships between the vibrational properties and glass-forming ability (GFA) of an Fe-Co-Cr-Mo-C-B-Y alloy system. Among the alloy systems studied, the best glass former Fe41Co7Cr15Mo14C15B6Y2 bulk metallic glass (BMG) (Co7 alloy) showed the maximum vibrational wavenumber of acoustic and optical modes. The origin of the excellent GFA of the Co7 alloy was discussed...
The practical applications of Fe-based bulk metallic glasses (BMGs) have been seriously restricted due to their small critical sizes. Understanding the underlying factors governing the glass-forming ability (GFA) of Fe-based BMGs is the essence to solve this problem. Here, the specific heat capacities (C p ) of amorphous and crystalline Fe–Co–Cr–Mo–C–B–Y alloys have been investigated in detail...
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