On the fragility of Nb-Ni-based and Zr-based bulk metallic glasses
- Department of Mechanical Engineering, Oregon State University, Corvallis, Oregon 97331 (United States)
The heating rate dependencies of the glass transition temperature of the Ni{sub 65}Nb{sub 35}, Ni{sub 60}Nb{sub 35}Sn{sub 5}, Ni{sub 59.35}Nb{sub 34.45}Sn{sub 6.2}, Ni{sub 60}(Nb{sub 40}Ta{sub 60}){sub 34}Sn{sub 6}, and Ni{sub 57}Fe{sub 3}Nb{sub 35}Sn{sub 5} metallic glass-forming alloys were investigated with a differential scanning calorimeter (DSC). The relaxation time for each DSC experiment was plotted versus inverse temperature, and a Vogel-Fulcher-Tamman (VFT)-type relation was fitted to the data. The fragilities of the alloys were characterized with the fragility parameter, D*, and the VFT temperature, T{sub 0}, which are the fit parameters from the VFT relation. It was found that for the binary alloy D*=6.2, for the ternary alloys D*=11.0, and that for the quaternary alloys D* was between 16.4 and 19.0. These D* increase monotonically as the number of components in the alloy is increased. It was also found that the fragilities of Zr-based alloys show a similar trend.
- OSTI ID:
- 20634291
- Journal Information:
- Applied Physics Letters, Vol. 85, Issue 13; Other Information: DOI: 10.1063/1.1796523; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Calculations of the structure and properties of rapidly quenched NI/ZR alloys.
Strong liquid behavior of Zr-Ti-Cu-Ni-Be bulk metallic glass forming alloys