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Related Concept Videos

Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Vapor-Deposited High-Entropy Metallic Glasses.

Qun Yang1,2, Bo-Yan Wang2, Zi-Han Zhao2

  • 1College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, P. R. China.

The Journal of Physical Chemistry. B
|December 17, 2024
PubMed
Summary
This summary is machine-generated.

Physical vapor deposition (PVD) creates ultrastable glass. High-entropy materials in PVD glass show slower diffusion, leading to increased enthalpy and customizable properties for advanced materials design.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Physical Chemistry

Background:

  • Physical vapor deposition (PVD) is known to produce ultrastable glass via surface-accelerated diffusion.
  • High-entropy materials exhibit reduced atomic diffusion due to multicomponent effects.
  • The impact of delayed atomic motion on PVD glass formation and stability is not well understood.

Purpose of the Study:

  • To investigate the influence of high-entropy effects on the formation and stability of PVD glasses.
  • To explore the distinct behaviors of PVD high-entropy metallic glasses.
  • To determine if entropy can be controlled to customize thermal and kinetic properties of PVD glasses.

Main Methods:

  • Utilizing physical vapor deposition (PVD) to create high-entropy metallic glasses.
  • Analyzing the thermal properties, specifically glass transition temperature and enthalpy.
  • Comparing the behavior of high-entropy PVD glasses with conventional PVD glasses.

Main Results:

  • PVD high-entropy metallic glasses showed a minimal increase in glass transition temperature.
  • A significant increase in enthalpy was observed in these high-entropy PVD glasses.
  • These results suggest distinct thermal and kinetic behaviors influenced by entropy.

Conclusions:

  • Controlling entropy in PVD glasses allows for customization of thermal and kinetic properties.
  • This research opens new avenues for materials design and processing using high-entropy PVD glasses.
  • The findings highlight the potential for tailored material properties through entropy engineering in PVD processes.