CoCrFeMnNi high‐entropy alloy powder with excellent corrosion resistance and soft magnetic property prepared by gas atomization method

Abstract

To successfully fabricate high‐entropy alloys by powder metallurgy, laser cladding, or thermal sprayed method, the high‐entropy alloy powders possessing good homogeneous microstructure are very important. However, the study on the properties of the high‐entropy alloy powder has still been lacking. In this work, an equiatomic CoCrFeMnNi high‐entropy alloy powder with spherical shape was synthesized by gas atomization method. The as‐atomized CoCrFeMnNi high‐entropy alloy powder is composed of a single face‐centered cubic solid solution phase with the particle size of 34.0 μm. Furthermore, the as‐atomized powder exhibits excellent corrosion resistance in 10 % hydrochloric acid solution to 304 L stainless steel powder, and also shows an excellent soft magnetic behavior. Therefore, the gas atomization method can be used to generate other kinds of high‐entropy alloy powders for many challenging industrial applications.

Preparation and electrochemical characterization of Ti‐based amorphous metallic glass with high strength

“…At the same time, the reason for the decrease of atomized powder size is that the metal droplet rapidly cools from high temperatures. Such a cooling rate is fast, and the grain is too late to grow, resulting in a smaller powder particle [29] . In addition, it can be seen from the enlarged SEM image that the as‐prepared sample surface is wrinkled.…”

“…Such a cooling rate is fast, and the grain is too late to grow, resulting in a smaller powder particle. [29] In addition, it can be seen from the enlarged SEM image that the as-prepared sample surface is wrinkled. This is because the rapid cooling procedure of the molten droplet from high temperature to low temperature is a nonequilibrium cooling process.…”

Ultrafast Synthesis of High Entropy Oxide Nanoparticles by Flame Spray Pyrolysis

“…Recently, high entropy alloy (HEA) nanomaterials composed of five or more metals have attracted tremendous attention considering their unique and complex physicochemical properties derived from the high configurational entropy of mixing and tunable elemental compositional flexibility . Studies indicate that HEA nanomaterials possess superior properties including enhanced corrosion and wear resistance, thermal stability, superparamagnetic, and mechanical properties. − The increased configurational entropy is proposed to be the main factor contributing to the stability of solid solution in HEA. , The metal oxide NPs composed of multiple principal elements are equally being explored as multifunctional alternatives for antimicrobial, water purification, and catalytic applications. ,, …”

An advancement in the synthesis of unique soft magnetic CoCuFeNiZn high entropy alloy thin films

“…Nevertheless, among these surface coating approaches, only few of them are attainable for industrial applications owing to their own limitations. As of late, bulk and thin film HEAs are explored towards magnetic applications to a great extent 3 – 8 . Yet, recommendations for various functional applications are very limited due to the inferior functional properties compared with conventional soft magnetic materials.…”