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Metallic Solids

Metallic Solids

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 ÃÂ¢ÃÂÃÂseaÃÂ¢ÃÂÃÂ 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...

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Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

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Published on: May 14, 2016

Synthesis of High-Entropy Alloy Polyhedra Using Liquid Metal Dewetting.

Jingjing Liang¹, Guanghui Cao², Yile Zhang²

¹The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China.

Journal of the American Chemical Society

|May 7, 2025

Summary

Researchers developed a new method for synthesizing high-entropy alloy (HEA) polyhedra. This technique uses liquid metal to control shape, enabling advanced materials design and facet engineering.

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Area of Science:

Materials Science
Alloy Design
Nanotechnology

Background:

High-entropy alloys (HEAs) are crucial in materials science, with facet engineering being a key goal for advanced applications.
Synthesizing HEA polyhedra is challenging due to difficulties in controlling crystal faces under extreme conditions.

Purpose of the Study:

To develop a novel strategy for synthesizing HEA polyhedra with controlled facet engineering.
To overcome limitations of existing extreme-condition synthesis techniques for HEAs.

Main Methods:

A novel liquid-metal-participating biphasic-modulated dewetting strategy was employed for self-confined growth under near-equilibrium conditions.
In situ transmission electron microscopy and theoretical calculations were used to elucidate the formation mechanism.

Main Results:

The proposed strategy enables HEAs to form equilibrium polyhedral shapes by leveraging surface energy anisotropy.
Liquid metal facilitates fast diffusion, promoting the attainment of equilibrium shapes.
The method is versatile and applicable to various HEA compositions and crystal structures.

Conclusions:

This work introduces a new approach for HEA synthesis and facet engineering.
The liquid metal-assisted method offers a pathway to precisely control HEA morphology for tailored properties.
The findings pave the way for broader applications of engineered HEAs.