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Preparation of Binary and Ternary Deep Eutectic Systems
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Inter-element miscibility driven stabilization of ordered pseudo-binary alloy.

Kenshi Matsumoto1, Ryota Sato1, Yasutomi Tatetsu2

  • 1Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan.

Nature Communications
|February 25, 2022
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Summary
This summary is machine-generated.

Researchers stabilized a theoretically predicted Z3-FePd3 alloy phase using indium. This discovery demonstrates how specific inter-element miscibility can control alloy structures and properties.

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Area of Science:

  • Materials Science
  • Alloy Development
  • Crystallography

Background:

  • Multicomponent alloys can exhibit numerous crystal structures, but only thermodynamically stable phases form.
  • Controlling alloy phase formation is crucial for designing materials with desired properties.

Purpose of the Study:

  • To experimentally realize and stabilize the theoretically predicted Z3-FePd3 layered alloy structure.
  • To investigate the role of specific inter-element miscibility in stabilizing thermodynamically unstable phases.

Main Methods:

  • Experimental synthesis of a pseudo-binary Fe-Pd alloy with controlled addition of Indium.
  • First-principles calculations to analyze the electronic structure and stability of the Z3-FePd3 phase.
  • Characterization of the resulting crystal structure and phase composition.

Main Results:

  • Successfully synthesized the Z3-FePd3 layered structure, an unprecedented experimental example.
  • Indium addition, despite immiscibility with Fe, stabilized the Z3 phase through specific inter-element miscibility.
  • First-principles calculations confirmed the stabilization mechanism without altering the original density of states.

Conclusions:

  • Specific inter-element miscibility is a powerful tool to stabilize theoretically predicted, yet thermodynamically unstable, alloy phases.
  • This approach allows for the manipulation of material structures and properties through subtle compositional changes.
  • Opens new avenues for designing novel alloys with tailored functionalities.