High-entropy metallic glasses High-entropy metallic glasses are an emerging class of materials that show promising potential forvarious engineering applications because of their advantageous characteristics of high-entropy alloy composition and amorphous alloy structure. Owing to their excellent mechanical and physical properties, these metallic glasses have recently attracted increased attention. Research on related high-entropy metallic glasses is still in its infancy. In this study, the bases for designing the composition of high-entropy metallic glasses are introduced, and the effects of key physical parameters, such as mixing entropy (ΔSmix), mixing enthalpy (ΔHmix), and atomic mismatch (δ), on the microstructures of high-entropy metallic glasses are comprehensively analyzed. Moreover, the current status of the study of alloys systems, preparation methods, and mechanical and physical properties is discussed and summarized. Material systems of high-entropy metallic glasses that have been developed remain limited. Current methods for preparing high-entropy metallic glasses have inherited the characteristics of those for preparing amorphous alloys and high-entropy alloys. These methods can be roughly divided into liquid-phase preparation, gas-phase preparation, and solid-phase preparation. Owing to their excellent thermodynamic properties, high-entropy amorphous materials are expected to break through the size limit through thermal spraying and achieve large-scale applications. Research on the properties of high-entropy metallic glasses mainly focuses on mechanical properties, corrosion resistance, magnetic properties, amorphous-forming ability, and thermal stability. Among these topics of interest, the influence of high-entropy on the amorphous formation, structure, thermodynamic properties, and abnormal thermal stability of high-entropy metallic glasses must be urgently resolved. Potential topics on studies of material systems of high-entropy metallic glasses on the basis of the concept of material genetic engineering are explored. The application prospects of such materials are also discussed. © 2021, Materials Review Magazine. All right reserved.
