Synthesis of high entropy alloy polyhedra

Abstract

Abstract High entropy alloys (HEAs) are gaining extensive interest in materials science, and their facet engineering has long been a pursuit for materials design and advanced applications. However, limited by the poor compatibility of crystal face regulation in high entropy scenarios with the existing extreme-condition synthetic techniques, the synthesis of HEA polyhedra is still scarce and challenging. Herein, we proposed the strategy of biphasic-modulated dewetting for self-confinement growth under near-equilibrium conditions, thus realizing facet engineering of HEAs. We discovered that liquid metal endowing low surface energy could enhance the polyhedra stability by decreasing the whole-system energy. This strategy could also be extended to various HEA polyhedra with tunable chemical composition and crystal structure, with formation mechanism elucidated through density functional theory calculation and dynamic simulation.