2024/05/25 by Qiubo Zhang, Zhang, Qiubo, Yi Chen +5
Engineering · #Advanced Materials Characterization Techniques #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
paper · pdf · doi:10.48550/arxiv.2405.16329
openalex publication_date 2024/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
High-entropy alloys (HEAs) with various promising applications have attracted significant interest. However, alloying immiscible metal elements while controlling the morphology and crystallinity remains extremely challenging. We report a general route, by engineering liquid-liquid interfaces, for the synthesis of HEAs with controlled crystallinity (single crystal, mesocrystal, polycrystal, amorphous), morphology (0-dimension, 2-dimension, 3-dimension), and high composition diversity (20 elements) under mild conditions (room temperature to 80 degrees celsius). As reactions can be spatially confined at the liquid-liquid interface, it provides an opportunity to control the kinetics and reduce the alloying temperature. Our real-time observation of the alloying of HEAs reveals hydrogen-enhanced mixing and isothermal solidification that kinetically traps the mixing states due to composition changes. The concept of liquid-liquid interface engineering can be applied to obtain other high-entropy compounds.