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Related Experiment Video

Updated: Jul 20, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

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Size-dependent vitrification in metallic glasses.

Valerio Di Lisio1, Isabella Gallino2, Sascha Sebastian Riegler3

  • 1Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018, San Sebastián, Spain.

Nature Communications
|August 4, 2023
PubMed
Summary

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This summary is machine-generated.

Metallic glasses exhibit size-dependent vitrification kinetics, with smaller samples showing lower fictive temperatures. This finding offers new ways to achieve lower energy states in metallic glasses.

Area of Science:

  • Materials Science
  • Condensed Matter Physics

Background:

  • Bulk metallic glasses (BMGs) exhibit unique properties.
  • Reducing sample size can significantly alter material characteristics.
  • Understanding size effects is crucial for BMG applications.

Purpose of the Study:

  • To investigate the impact of size reduction on the vitrification behavior and atomic mobility of Au and Pt-based metallic glasses.
  • To explore the relationship between sample size and glassy dynamics.

Main Methods:

  • Systematic reduction of length scales in Au and Pt-based metallic glasses.
  • Utilizing fast scanning calorimetry (FSC) to study glassy dynamics across a wide range of cooling rates and frequencies.

Main Results:

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Last Updated: Jul 20, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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  • The primary alpha relaxation process remains independent of sample size, behaving similarly to bulk materials.
  • Pronounced, size-dependent vitrification kinetics were observed in micrometer-sized glasses.
  • The smallest samples exhibited a decrease in fictive temperature (Tf) of over 40 K compared to bulk, particularly at low cooling rates.

    • Conclusions:

    • Sample size significantly influences vitrification kinetics in metallic glasses, especially at smaller scales and lower cooling rates.
    • These findings suggest a pathway to achieve lower energy states in metallic glasses by controlling sample size.
    • The observed size effects have profound implications for the design and application of metallic glasses.