近日，武汉大学付磊团队实现了液态金属脱湿法合成高熵合金多面体。这一研究成果发表在2025年5月7日出版的《美国化学会志》杂志上。

高熵合金（HEA）在材料科学中引起了广泛的兴趣，其端面工程长期以来一直是材料设计和先进应用的追求。然而，由于高熵场景中晶面调控与现有极端条件合成技术的兼容性较差，HEA多面体的合成仍然稀缺且具有挑战性。在此，研究组提出了液态金属参与两相调制脱湿的策略，用于近平衡条件下的自约束生长。 

由于表面能各向异性，HEA可以发展成多面体结构的平衡形状，其中液态金属能够快速扩散以达到平衡形状。该策略还可以扩展到具有不同化学成分和晶体结构的不同HEA多面体，并通过原位透射电子显微镜实验和理论计算阐明其形成机制。这项工作为HEA的调节注入了新的活力，并加快了它们的方面工程。

附：英文原文

Title: Synthesis of High-Entropy Alloy Polyhedra Using Liquid Metal Dewetting

Author: Jingjing Liang, Guanghui Cao, Yile Zhang, Zeyuan Li, Xuhao Wan, Jiqing Jiao, Kaicong Yang, Li Xiao, Yuzheng Guo, Mengqi Zeng, Lei Fu

Issue&Volume: May 7, 2025

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 propose the strategy of liquid-metal-participating biphasic-modulated dewetting for self-confinement growth under near-equilibrium conditions. Owing to the surface energy anisotropy, HEAs could develop into the equilibrium shape with a polyhedral configuration, where liquid metal endows fast diffusion toward reaching the equilibrium shape. This strategy could also be extended to diverse HEA polyhedra with different chemical compositions and crystal structures with the formation mechanism elucidated through in situ transmission electron microscopy experiments and theoretical calculations. This work injects new vitality into the regulation of HEAs and expedites their facet engineering.

DOI: 10.1021/jacs.5c02254

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.5c02254