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Related Experiment Video

Updated: Feb 12, 2026

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

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

Published on: June 7, 2018

Ultrastable metallic glasses formed on cold substrates.

P Luo^1,2, C R Cao^1,2, F Zhu³

¹Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China.

Nature Communications

|April 13, 2018

Summary

This study demonstrates the creation of ultrastable metallic glasses at room temperature, challenging the need for high substrate temperatures. Controlled deposition rates enhance glass stability, leading to improved properties and a deeper understanding of glass dynamics.

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Last Updated: Feb 12, 2026

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Area of Science:

Materials Science
Condensed Matter Physics

Background:

Vitrification via physical vapor deposition is key for enhancing glass properties.
High substrate temperatures near the glass transition temperature (Tg) are traditionally considered essential for stable glass formation.

Purpose of the Study:

To challenge the empirical rule requiring high substrate temperatures for stable glass formation.
To investigate the formation of ultrastable metallic glasses (MGs) at significantly lower temperatures.

Main Methods:

Utilizing physical vapor deposition to create Zr-based metallic glasses.
Carefully controlling the deposition rate as a critical parameter.
Investigating glass properties at a substrate temperature of 0.43Tg.

Main Results:

Formation of ultrastable Zr-based metallic glasses achieved at room temperature (0.43Tg).
Controlled deposition rates led to enhanced glass stability.
Ultrastable MGs exhibited a significant increase in Tg (~60 K), improved crystallization resistance, and a more homogeneous structure compared to conventional glasses.

Conclusions:

The study successfully challenges the conventional substrate temperature limitation for creating ultrastable glasses.
Findings offer new insights into glass stability mechanisms and surface dynamics.
This work opens avenues for developing advanced metallic glasses under less energy-intensive conditions.