Difference between Superalloys and High Entropy Alloys

Super alloys and high entropy alloy are two different types of materials. Superalloys are mainly used in high temperature environment and have complex crystal structure. However, high entropy alloys have highly uniform composition and disordered structure.

1. Composition and structure:

-Superalloys: Superalloys are materials that combine base metal with alloying elements (such as nickel, cobalt, iron, etc.). ). Superalloys usually have complex crystal structures, such as γ phase and γ′ equivalent. The addition of these alloying elements can change the crystal structure, enhance the high temperature strength of the material and improve the heat resistance.

-High-entropy alloy: High-entropy alloy is a special multi-element alloy, which contains at least five or more mutually soluble main elements. Compared with traditional alloys, high-entropy alloys are highly homogeneous in composition and have no obvious main elements and secondary elements. The structure of high entropy alloys is usually uniform and disordered, similar to disordered solid solution or glassy structure.

2. Performance:

-Superalloy: Superalloy is mainly used in high-temperature environment, with excellent high-temperature strength, oxidation resistance and hot corrosion resistance. These alloys are usually used in aerospace, energy, chemical industry and other fields.

High-entropy alloys: In recent years, high-entropy alloys have attracted extensive research interest. Because of its special composition and structure, high entropy alloys show good mechanical properties, corrosion resistance and radiation resistance. This makes high entropy alloys have a wide range of application potential in materials science and other fields.