Revisiting the Dependence of Poisson's Ratio on Liquid Fragility and Atomic Packing Density in Oxide Glasses

Materials
Martin B ØstergaardMorten M Smedskjaer

Abstract

Poisson's ratio (ν) defines a material's propensity to laterally expand upon compression, or laterally shrink upon tension for non-auxetic materials. This fundamental metric has traditionally, in some fields, been assumed to be a material-independent constant, but it is clear that it varies with composition across glasses, ceramics, metals, and polymers. The intrinsically elastic metric has also been suggested to control a range of properties, even beyond the linear-elastic regime. Notably, metallic glasses show a striking brittle-to-ductile (BTD) transition for ν-values above ~0.32. The BTD transition has also been suggested to be valid for oxide glasses, but, unfortunately, direct prediction of Poisson's ratio from chemical composition remains challenging. With the long-term goal to discover such high-ν oxide glasses, we here revisit whether previously proposed relationships between Poisson's ratio and liquid fragility (m) and atomic packing density (Cg) hold for oxide glasses, since this would enable m and Cg to be used as surrogates for ν. To do so, we have performed an extensive literature review and synthesized new oxide glasses within the zinc borate and aluminoborate families that are found to exhibit high Poisson's rat...Continue Reading

References

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Citations

May 24, 2020·Nature Communications·Theany ToMorten M Smedskjaer
Jul 1, 2020·Materials·Martin B ØstergaardMorten M Smedskjaer
Apr 7, 2021·ACS Applied Materials & Interfaces·Theany ToMorten M Smedskjaer

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Methods Mentioned

BETA
differential scanning calorimetry

Software Mentioned

SciGlass

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