Soft magnetic materials with a nanocrystalline structure are significant from an application and scientific point of view. This article presents the possibility of obtaining nanocrystalline Fe_76−xNi₁₀B₁₄Cu_x alloy with magnetic properties modified by ultra-rapid annealing (URA). The work is focused on thermodynamic calculations to determine the alloy's optimal copper content and achieving soft magnetic properties of selected material by ultra-rapid annealing. The examined copper concentration was in the range from 0 to 2 at%. The optimal copper concentration was investigated based on the minimization of the Gibbs free energy of amorphization value. Accordingly, the Fe_75.3Ni₁₀B₁₄Cu_0.7 alloy was taken for further experimental analysis. The URA process was performed in a specially designed, home-made apparatus, in which the amorphous precursor in the ribbon shape was annealed between hot blocks at 773 K for the time in the range of 0.5–30 s. The ribbons were examined in detail by differential scanning calorimetry, X-ray diffraction, and⁵⁷Fe Mössbauer spectroscopy. The nucleation mechanisms in the amorphous material upon crystallization have been studied. The dependence of the mean grain size and the content of the crystalline phase on annealing time was determined. The coercivity, H_c, and saturation magnetic polarization, J_s, measurements revealed changes in the alloy’s magnetic behavior with increasing the annealing time. Optimal conditions of the URA process were determined in order to obtain soft magnetic Fe_75.3Ni₁₀B₁₄Cu_0.7nanocrystalline alloy.

从应用和科学的角度来看，具有纳米晶体结构的软磁材料具有重要意义。本文介绍了通过超快速退火 (URA) 获得具有磁性的纳米晶 Fe _76−x Ni ₁₀ B ₁₄ Cu _{x合金的可能性。}这项工作的重点是热力学计算，以确定合金的最佳铜含量，并通过超快速退火实现所选材料的软磁性能。检查的铜浓度在 0 至 2 at% 的范围内。基于非晶化吉布斯自由能值的最小化研究了最佳铜浓度。因此，Fe _75.3 Ni ₁₀ B_取14 Cu _0.7合金作进一步实验分析。URA 工艺是在一个专门设计的自制设备中进行的，其中带状的无定形前体在 773 K 的热块之间退火，时间范围为 0.5-30 秒。通过差示扫描量热法、X 射线衍射和⁵⁷ Fe Mössbauer 光谱对这些色带进行了详细检查。已经研究了结晶时非晶材料中的成核机制。确定了平均晶粒尺寸和结晶相含量对退火时间的依赖性。矫顽力H _c和饱和磁化极化J _s，测量显示合金的磁性随着退火时间的增加而发生变化。确定URA工艺的最佳条件以获得软磁性Fe _75.3 Ni ₁₀ B ₁₄ Cu _0.7纳米晶合金。