Correlation between fragility and glass-forming ability of metallic alloys
- UES, Inc., 4401 Dayton-Xenia Road, Dayton, Ohio 45432 (United States)
Analysis of the relaxation time of the glass forming liquids at near liquidus temperatures was conducted, correlation between the critical cooling rate for glass formation, fragility of the glass forming liquid, and reduced glass transition temperature was identified, and a glass forming ability (GFA) parameter (F{sub 1}=2[(m/m{sub min})(1/T{sub rg}-1)+2]{sup -1}) was proposed. This GFA parameter, which increases with a decrease in the critical cooling rate, is a function of the reduced glass transition temperature T{sub rg} and a fragility index m, and it varies from {approx}0 in the case of extremely fragile liquid to 2T{sub rg}/(1+T{sub rg}) in the case of extremely strong liquid. An exponential relationship between the critical cooling rate for glass formation and the parameter F{sub 1} was identified and verified using available experimental data for metallic and nonmetallic glasses.
- OSTI ID:
- 21055149
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 10 Vol. 76; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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