Owing to their unique properties and technological potential, high entropy alloys (HEAs) have become the subject of great interest in the materials science community. HEAs consist of more than four principle elements in equimolar ratio so their configurational entropy is intrinsically greater than one‐principle element based. The increasing surface energy and chemical tendency toward clustering of like atoms at low dimension, however, make production of HEA‐nanoparticles (HEA‐NPs) extremely difficult. A facile production of HEA‐NPs inside carbon nanotubes and nanoparticles is demonstrated in this work. Electron microscopic and elemental analyses confirm encapsulated to be solution phase; some embrace carbides and form multidomains with chemical composition ranging from quaternary to quinary phase. Multidomains and nonmagnetic centers create hardening thus promoting coercivity significantly at room temperature. Alloying induces electron redistribution into high spin states, accounting for observed high saturation. Configurational entropy of encapsulated HEA‐NPs lies on a range comparable with bulk.

中文翻译：

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室温下具有异常矫顽力和饱和度的高熵合金纳米颗粒的碳包封

由于其独特的性能和技术潜力，高熵合金（HEA）已成为材料科学界的热门话题。HEA由等摩尔比的四个以上主要元素组成，因此它们的结构熵本质上大于基于一个原理的元素。然而，表面能的增加和化学趋势倾向于在低维处聚集相似的原子，这使得生产HEA-纳米颗粒（HEA-NPs）非常困难。在这项工作中证明了在碳纳米管和纳米颗粒内部的HEA-NP的简便生产。电子显微镜和元素分析证实包封为溶液相；一些包含碳化物，并形成化学结构从四级到五级相的多畴。多畴和非磁性中心会产生硬化，从而在室温下显着提高矫顽力。合金化导致电子重新分布为高自旋态，这说明了观察到的高饱和度。封装的HEA-NP的构型熵在与本体相当的范围内。