Abstract Fe81.5Si0.5B4.5P11Cu0.5C2 nanocrystalline alloy with high Fe concentration possesses a finely uniform nanocrystalline structure and numerous α-Fe crystals with a mean grain size of ∼17 nm based on XRD patterns. Such crystals precipitated from the amorphous matrix. Favorable soft magnetic properties, small value of coercivity (Hc) of ∼4.8 A/m, and high magnetic flux density (Bs) of ∼1.53 T can be achieved by slow heat treatment (heating rate of ∼10 °C/min). In this case, one-step annealing at a low heating rate is truly antipodal to Fe–Si–B–P–Cu alloy. We analyzed the nanocrystallized mechanism during annealing with various heating rates in Fe81.5Si0.5B4.5P11Cu0.5C2 alloy, which inevitably simplified the industrial crystallization process by one-step annealing at a low heating rate.

中文翻译：

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加热速率对Fe81.5Si0.5B4.5P11Cu0.5C2纳米晶合金磁软度的独特影响

摘要 Fe81.5Si0.5B4.5P11Cu0.5C2 高Fe 浓度纳米晶合金具有精细均匀的纳米晶结构和大量α-Fe 晶体，基于XRD 谱，平均晶粒尺寸为~17 nm。这种晶体从无定形基质中析出。良好的软磁性能、较小的矫顽力 (Hc) 值约 4.8 A/m 和约 1.53 T 的高磁通密度 (Bs) 可通过缓慢热处理（约 10 °C/min 的加热速率）实现。在这种情况下，低加热速率的一步退火确实与 Fe-Si-B-P-Cu 合金相反。我们分析了Fe81.5Si0.5B4.5P11Cu0.5C2合金在不同升温速率下退火过程中的纳米晶化机理，通过低升温速率一步退火不可避免地简化了工业结晶过程。