Recent Progress in High Temperature Dynamical Properties and Fragility in Metallic Liquids

Dear colleagues,

One of the most striking properties of glass-forming liquids is their dynamical properties, such as viscosity, diffusion coefficient, and structural relaxation time. Within a few hundred degrees change in temperature, these properties change by twelve to fourteen orders of magnitude in a highly non-linear manner. In particular, liquids can be classified based on their dynamical properties by their “fragility”. This is defined by the logarithmic rate of change of their properties on a reduced temperature scale, T(subscript g)/T, where T(subscript g) is the glass transition temperature. Liquids with smaller magnitudes of this parameter are called “strong”, and those with larger magnitudes are known as “fragile”. Among other properties, this parameter plays an important role in glass formation.

Although a great deal of effort has been made to understand the dynamical properties of metastable (below the equilibrium melting temperature) supercooled liquids, much less has been done to understand their high temperature properties. Recently, a significant body of theoretical and experimental work, especially on metallic liquids, has focused on this topic. This Special Issue of Metals, entitled “Recent Progress in High Temperature Dynamical Properties and Fragility in Metallic Liquids”, aims to highlight recent developments in this field. We cordially invite submissions related to this topic from experimental, theoretical, and computer simulation groups.

Dr. Anup Gangopadhyay
Guest Editor

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• metallic glasses
• dynamical properties
• liquids, fragility
• crossover temperature