Effect of Binding and Dispersion Behavior of High-Entropy Alloy (HEA) Powders on the Microstructure and Mechanical Properties in a Novel HEA/Diamond Composite

Abstract

This study reports the results of the addition of diamonds in the sintering process of a FCC-structured CoCrFeNiMo high-entropy alloy. The effect of raw powder states such as elemental mixed (EM) powder, gas atomization (GA) powder and mechanical alloying (MA) powder on the uniformity of constituent phase was also investigated. Examination of microstructure and evaluation of mechanical properties of the composites depending on the mixing processes were performed. As a result, GA+MA powder composite showed the highest mechanical properties. The experimental results indicated that the powder manufacturing method was an essential parameter to determine the quality of HEA/diamond composites such as the uniformity of phase and binding behavior.

Fabrication of carbon-based materials derived from a cobalt-based organic framework for enhancing photocatalytic degradation of dyes

“…3a). 46,47 Fig. 3b shows a high-resolution XPS spectrum of Co 2p, with two satellite peaks observed at 779.4 eV and 794.7 eV, respectively, attributed to the presence of Co 2+ in the sample.…”

A critical review on mechanically alloyed high entropy alloys: processing challenges and properties

“…The operational parameters must be tailored to obtain the utmost possible properties. In MA, the spherical morphology of elemental powder progressively evolves depending on several factors including a low ball to powder ratio (10:1) and a medium speed of 300 RPM during the optimal duration that can considerably retain the morphology of alloyed particles [146][147][148]. Milling duration must not be quite long; longer milling times diminish diffraction peaks.…”

New Advances in High-Entropy Alloys

“…% TiC-reinforced particles, the compressive fracture strength of the composite reached 1542 MPa, and this was increased by approximately 50% compared with that of the as-cast NbMoCrTiAl HEA. Furthermore, two types of novel HEA/diamond composites were reported, providing a new model for material development [ 41 , 42 ].…”