To overcome the trade-off between high saturation magnetization (B_s) and poor glass forming ability (GFA) for Fe-based alloys, the GFA, nanocrystallization and soft magnetic properties of Fe_83.5Si₁B_9.2P₅C_0.5Cu_0.8-xV_x (x = 0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8 at%) alloys were investigated. It is shown that the critical thickness of as-quenched amorphous ribbons can be increased from 24 μm to 35 μm with the increase of V, which is significant to the mass production of amorphous ribbons, from 0 to 0.8 at%,. Excellent magnetic properties have been achieved by tailoring the V/Cu ratio and annealing temperatures. The amorphous alloys with more than 0.4 at% V exhibit B_s above 1.73 T and coercivity (H_c) lower than 4.1 A/m, and nanocrystalline alloys with less than 0.4 at% V exhibit B_s above 1.8 T and H_c lower than 10 A/m, respectively. This research discusses the structural mechanism underlying the magnetic properties of amorphous/nanocrystalline alloys. It also confirms that the formation of amorphous structure with high enhanced stability and the nanocrystallization of α-Fe(Si) grains with the average size about 23 nm are keynotes for these soft magnetic materials.

为了克服铁基合金的高饱和磁化强度（ B _s ）和较差的玻璃形成能力（GFA）之间的权衡，Fe _83.5 Si ₁ B _9.2 P ₅ C _0.5 Cu _0.8-的 GFA、纳米化和软磁性能_x V _x ( x = 0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8 at%) 合金进行了研究。结果表明，随着 V 的增加，淬火后非晶薄带的临界厚度可以从 24 μm 增加到 35 μm，这对非晶薄带的量产具有重要意义，从 0 到 0.8 at%。通过调整 V/Cu 比和退火温度，已经实现了优异的磁性。V 大于 0.4 at% V 的非晶合金表现出高于 1.73 T的B _s和低于 4.1 A/m 的矫顽力 ( H _c )，而 V 小于 0.4 at% V 的纳米晶合金表现出高于 1.8 T 和H _c的B _s分别低于 10 A/m。本研究讨论了非晶/纳米晶合金磁性的结构机制。这也证实了具有高度增强稳定性的非晶结构的形成和平均尺寸约为23 nm的α-Fe(Si)晶粒的纳米化是这些软​​磁材料的基调。