# Correlation of the fragility of metallic liquids with the high temperature structure, volume, and cohesive energy

## TL;DR

This study links metallic liquids' fragility to their high-temperature structure, volume, and cohesive energy, providing insights for designing metallic glasses based on measurable properties.

## Contribution

It establishes a clear connection between liquid fragility and high-temperature structural and volumetric changes, highlighting the role of cohesive energy in metallic liquids.

## Key findings

- Fragility correlates with structural and volumetric changes at high temperatures.
- More fragile liquids exhibit larger changes in structure and volume.
- Fragility can be predicted from cohesive energy.

## Abstract

The thermal expansion coefficients, structure factors, and viscosities of twenty-five equilibrium and supercooled metallic liquids have been measured using an electrostatic levitation (ESL) facility. The structure factor was measured at the Advanced Photon Source, Argonne, using the ESL. A clear connection between liquid fragility and structural and volumetric changes at high temperatures is established; the observed changes are larger for the more fragile liquids. It is also demonstrated that the fragility of metallic liquids is determined to a large extent by the cohesive energy and is, therefore, predictable. These results are expected to provide useful guidance in the future design of metallic glasses.

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Source: https://tomesphere.com/paper/1703.03467