Correlation between superheated liquid fragility and potential energy landscape in Gd-and Pr-based glass-forming alloys

s The kinetic viscosities of superheated liquids on the Gd-based bulk glass-forming alloys are measured by an oscillating viscometer in a high vacuum atmosphere. According to the viscosity data, the parameters of superheated liquid fragility, M , are calculated. Based on the values of M in Gd-and Pr...

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Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2008-04, Vol.51 (4), p.387-393
Main Authors: Guo, Jing, Bian, XiuFang, Li, XueLian, Wang, CaiDong
Format: Article
Language:English
Subjects:
Alloy systems
Alloys
Astronomy
Classical and Continuum Physics
Enthalpy
Fragility
Gadolinium
Glass formation
High vacuum
Observations and Techniques
Physics
Physics and Astronomy
Potential energy
Viscometers
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Summary:s The kinetic viscosities of superheated liquids on the Gd-based bulk glass-forming alloys are measured by an oscillating viscometer in a high vacuum atmosphere. According to the viscosity data, the parameters of superheated liquid fragility, M , are calculated. Based on the values of M in Gd-and Pr-based (cited from the literature) glass-forming alloys, we find that there is a linear correlation between M and the absolute value of mixing enthalpy, |Δ H mix |, in an alloy system with the same base element, and the larger M , the smaller |Δ H mix |. The alloy with larger M exhibits the larger height of energy barriers separating the minima on the potential energy landscape.
ISSN:1672-1799
1674-7348
1862-2844
1869-1927
DOI:10.1007/s11433-008-0044-3