We draw attention to the relationship between volumetric change and glass-forming ability (GFA) in various metallic glass-forming alloys. The critical cooling rate can be expressed as Rc =2.5× 10-5 exp (5.0× 102 Vlg), where Vlg is defined as (Vl - Vg) Vl. We specifically plot the temperature dependence of specific volume for Ca65 Mg15 Zn20 alloy, and then demonstrate that the larger slope between Vl and Vg, closely related to thermal expansion coefficient, corresponds well to the GFA of the alloy. This insight can provide a clue if the correlations are to be used in the appreciation of glass formation and in the development of an alloy system with enhanced GFA.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory of the Korean Ministry of Science. One of the author (E.S.P.) was supported by the Korea Research foundation Grant funded by the Korean Government (MOEHRD) (KRF-2006-214-D00066). The authors are indebted to Professor Frans Spaepen of Harvard University for thoughtful advice.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)