In this work, Fe_83+x(B₄P₈C₄)_16-xCu₁ (x = 0, 1, 1.5 and 2 at. %) alloy system with amorphous/α-Fe hierarchic structures in as-cast state were artificially designed. The microstructure, crystallization kinetics, nanocrystalline structure, and magnetic properties of the alloys were systematically investigated. And the structural mechanism for the magnetic properties of these alloys was discussed. It is shown that the structure is evolved from full amorphous to amorphous/α-Fe dual-phase microstructure in the free surface side, and/or roller side layer with Fe content increasing. The formation of hierarchic structure decreases the activation energies of onset and peak crystallization of α-Fe phase, and increases the size of nanocrystalline grains, and subsequently is beneficial to improve the B_s of alloys. The H_c of alloys increases due to the formation of hierarchic structure, whereas this effect is gradually eliminated by the annealing process at the suitable crystallization annealing temperature (T_a). Typically, Fe₈₅B_3.5P₇C_3.5Cu₁ nanocrystalline alloy exhibit the B_s of 1.86T and H_c of 5.7 A/m after annealing at 723 K. High Fe bearing alloys have lath domain structure with stronger orientation preference in as-cast state, and transformed into labyrinth packing with thinner spacing after structural relaxation annealing, demonstrating that hierarchic structure leads to the high magnetic anisotropy in the alloys.

在这项工作中，Fe _{83+ x}（B ₄ P ₈ C ₄）_{16- x} Cu ₁（x = 0、1、1.5和2 at。人工设计了具有非晶态/α-Fe分级结构的铸态合金体系。系统地研究了合金的微观结构，结晶动力学，纳米晶体结构和磁性。并讨论了这些合金的磁性能的结构机理。结果表明，随着Fe含量的增加，在自由表面侧和/或辊侧层中，组织从完全非晶态发展为非晶态/α-Fe双相组织。层状结构的形成降低了α-Fe相的开始和峰值结晶的活化能，并增加了纳米晶粒的尺寸，从而有利于改善合金的B _s。该^ h _Ç合金的层数由于形成了层状结构而增加，而在适当的结晶退火温度（T _a）下，通过退火过程逐渐消除了这种影响。通常，Fe ₈₅ B _3.5 P ₇ C _3.5 Cu ₁纳米晶合金的B _s为1.86T，H _c 高铁合金在723 K退火后达到5.7 A / m。在铸态下，高铁含量合金的板条畴结构具有更强的取向优先性；在结构弛豫退火后，高铁合金转变为较薄间距的迷宫堆积，这说明层状结构导致了合金中的磁各向异性。