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Related Concept Videos

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
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Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
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Updated: Dec 18, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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High Pressure Quenched Glasses: unique structures and properties.

W Dmowski1, G H Yoo2, S Gierlotka3

  • 1Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37996, USA. wdmowski@utk.edu.

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|June 13, 2020
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Summary

High Pressure Quenched Zr-based metallic glasses exhibit enhanced mechanical properties and distinct structural changes. These findings support the theory of a pressure-induced liquid transition in supercooled melts.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics

Background:

  • Metallic glasses possess unique amorphous structures.
  • Understanding their properties under extreme conditions is crucial.

Purpose of the Study:

  • To investigate the structural and property changes in Zr-based metallic glasses prepared under high pressure.
  • To explore the influence of pressure-induced transitions on material behavior.

Main Methods:

  • Preparation of Zr-based metallic glasses via high-pressure quenching.
  • Analysis of structural changes using pair distribution function.
  • Characterization of mechanical properties (density, hardness, elastic modulus, yield stress).
  • Thermal analysis to study relaxation behavior above the glass transition.

Main Results:

  • High Pressure Quenched (HPQ) glasses show altered Zr-Zr interatomic distances.
  • HPQ glasses exhibit increased density, hardness, elastic modulus, and yield stress.
  • Distinct volume expansion and relaxation behavior observed upon heating.

Conclusions:

  • High-pressure quenching induces significant structural modifications in Zr-based metallic glasses.
  • The observed changes correlate with enhanced mechanical performance.
  • Results align with the concept of a pressure-induced liquid density transition.