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Related Concept Videos

Entropy Changes Accompanying Specific Processes01:21

Entropy Changes Accompanying Specific Processes

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Entropy, a measure of disorder in a system, changes during phase transitions like freezing or boiling. At the transition temperature Ttrs, where two phases are in equilibrium, the phase transition is a reversible process. The entropy change can be calculated from a substance's enthalpy of transition using the equation ΔStrs = ΔtrsH /Ttrs.When a perfect gas expands isothermally from one volume to another, entropy increases logarithmically with volume. Conversely, isothermal compression...
161

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Determination of Thermodynamic Properties of Alkaline Earth-liquid Metal Alloys Using the Electromotive Force Technique
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Phase Engineering of High-Entropy Alloys.

Xuejiao Chang1, Mengqi Zeng1, Keli Liu2

  • 1College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.

Advanced Materials (Deerfield Beach, Fla.)
|February 27, 2020
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Summary

High-entropy alloys (HEAs) offer superior properties due to their unique composition. This review explores strategies for controlling HEA phase structures to enhance their performance for advanced applications.

Keywords:
high-entropy alloysphase engineeringproperty tuning

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Area of Science:

  • Materials Science
  • Metallurgy
  • Solid State Chemistry

Background:

  • High-entropy alloys (HEAs) are multicomponent alloys with five or more principal elements in equal or near-equal atomic proportions.
  • HEAs exhibit exceptional mechanical, chemical, and thermal properties, surpassing traditional alloys.
  • The phase structure of HEAs is critical in dictating their overall performance and application potential.

Purpose of the Study:

  • To review diverse phase structures in HEAs and their associated properties.
  • To focus on alternative strategies for tuning HEA phase structures.
  • To discuss property adjustments in phase-engineered HEAs and future research directions.

Main Methods:

  • Literature review of diverse HEA phase structures and properties.
  • Analysis of various tuning strategies for achieving desired phase structures.
  • In-depth discussion on property adjustments in phase-engineered HEAs.

Main Results:

  • Introduction to various phase structures found in HEAs.
  • Overview of different methods for controlling HEA phase formation.
  • Detailed examination of how phase engineering impacts HEA properties.

Conclusions:

  • Controllable synthesis of desired phases is essential for enhancing HEA performance.
  • Phase engineering offers a promising route for tailoring HEA properties for specific applications.
  • Further research into challenges and prospects is crucial for the advancement of HEA technology.