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Compositional dependence of the fragility in metallic glass forming liquids.

ABSTRACT: The viscosity and its temperature dependence, the fragility, are key properties of a liquid. A low fragility is believed to promote the formation of metallic glasses. Yet, the fragility remains poorly understood, since experimental data of its compositional dependence are scarce. Here, we introduce the film inflation method (FIM), which measures the fragility of metallic glass forming liquids across wide ranges of composition and glass-forming ability. We determine the fragility for 170 alloys ranging over 25 at.% in Mg-Cu-Y. Within this alloy system, large fragility variations are observed. Contrary to the general understanding, a low fragility does not correlate with high glass-forming ability here. We introduce crystallization complexity as an additional contribution, which can potentially become significant when modeling glass forming ability over many orders of magnitude.

SUBMITTER: Kube SA

PROVIDER: S-EPMC9240049 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Compositional dependence of the fragility in metallic glass forming liquids.

Kube Sebastian A SA Sohn Sungwoo S Ojeda-Mota Rodrigo R Evers Theo T Polsky William W Liu Naijia N Ryan Kevin K Rinehart Sean S Sun Yong Y Schroers Jan J

Nature communications 20220628 1

The viscosity and its temperature dependence, the fragility, are key properties of a liquid. A low fragility is believed to promote the formation of metallic glasses. Yet, the fragility remains poorly understood, since experimental data of its compositional dependence are scarce. Here, we introduce the film inflation method (FIM), which measures the fragility of metallic glass forming liquids across wide ranges of composition and glass-forming ability. We determine the fragility for 170 alloys r ...[more]

PMID: 35764635

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