Abstract Fe-based alloys with a nanocrystalline-amorphous nanostructure exhibit superior soft-magnetic performances; however they generally suffer from the low magnetization because of their heavy doping for an acceptable manufacturability. In this study, we proposed a revolutionary nanostructure-construction concept based on preforming dense nuclei in the melt-quenching process with a critical cooling-rate and refining the nano-structure via transient metalloid-rich interfaces. A novel alloy composition of Fe85.5B10Si2P2C0.5 was developed via our multi-metalloid stabilization and critical formability strategies by using a total of only 4.6 wt. % light metalloids. This unique alloy design effort leads to unprecedented magnetic properties with the super-high Bs of 1.87 T and µe of 1.0–2.5 × 104, which outperform all commercial counterparts and have a high potential to substitute for commercial bulk Si-steels currently used for soft-magnetic applications. This hetero-structuring and lean-alloying strategy provides a paradigm for the next-generation of magnetic materials.

中文翻译：

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具有优异磁化和可制造性的铁基纳米晶合金的设计

摘要 具有纳米晶-非晶纳米结构的铁基合金表现出优异的软磁性能；然而，由于它们的重掺杂以获得可接受的可制造性，它们通常会受到低磁化的影响。在这项研究中，我们提出了一种革命性的纳米结构构建概念，该概念基于在具有临界冷却速率的熔体淬火过程中预成型致密核，并通过瞬态富金属界面细化纳米结构。Fe85.5B10Si2P2C0.5 的新型合金成分是通过我们的多类金属稳定化和临界成形性策略开发的，总共仅使用 4.6 重量％。% 轻金属。这种独特的合金设计带来了前所未有的磁性，具有 1.87 T 的超高 Bs 和 1.0–2.5 × 104 的 µe，其性能优于所有商业同类产品，并且具有替代目前用于软磁应用的商业大块硅钢的巨大潜力。这种异质结构和精益合金化策略为下一代磁性材料提供了范例。