Abstract The idea of adjusting the crystallinity of powders via controlling the phase composition of milling precursor (ribbons) has been used to prepare FeCoNiSi0.4Al0.4 high entropy alloy powders (HEAPs) with dual-phase nano-crystal (NC) and nano-amorphous (NA) microstructure. The crystallinity of HEAPs are related to the FCC phase proportion of milling precursor: within 60%, positive correlation; beyond 60%, negative correlation. Different phase structure for ribbons can be obtained by taking advantage of the difference in phase stability, as an extension of annealing time induces the increment of FCC phase content. The introduction of nano-scale phase separation in HEA ribbons provides a prerequisite. Multiphase NCs distribute randomly in matrix, while NCs with FCC phase are aggregated into about 50 nm regions embedded in matrix. Three kinds of phase transition are co-existed during the dry-milling process, generating the coexistence of NCs and NAs. Due to the unique microstructure, in especial NCs doped by NAs, and the skillful preparation technology, a small Hc, varying from 12.97 Oe (C0) to 28.33 Oe (C50), and a large complex permeability (μ′), varying from 2.60 (C0) to 2.30 (C50), can be obtained.

中文翻译：

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基于FeCoNiSi0.4Al0.4的双相纳米晶体和纳米非晶微观结构调谐磁性能

摘要 通过控制球磨前驱体（带状体）的相组成来调节粉末结晶度的思想已被用于制备具有双相纳米晶（NC）和纳米晶的 FeCoNiSi0.4Al0.4 高熵合金粉末（HEAPs）。非晶 (NA) 微观结构。HEAPs的结晶度与球磨前驱体的FCC相比例有关：60%以内，正相关；超过 60%，负相关。由于退火时间的延长会导致FCC相含量的增加，因此可以利用相稳定性的差异来获得不同的薄带相结构。在 HEA 带中引入纳米级相分离提供了先决条件。多相 NCs 在基质中随机分布，而具有 FCC 相的 NCs 聚集成约 50 nm 的区域嵌入基质中。干磨过程中三种相变共存，导致NCs和NAs共存。由于独特的微观结构，特别是在 NAs 掺杂的 NCs 中，以及熟练的制备技术，小的 Hc，从 12.97 Oe (C0) 到 28.33 Oe (C50)，以及大的复杂磁导率 (μ')，从 2.60 不等(C0) 到 2.30 (C50)，可以得到。