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研究了Ｎｂ含量ｘ对Ｆｅ＿（７６．５－ｘ）Ｃｕ＿（１．０）Ｎｂ＿ｘＳｉ＿（１３．５）Ｂ＿（９．０）纳米软磁合金的结构与磁性影响。研究结果表明，当Ｎ６含量ｘ约为３ａｔ％时，合金的软用性能最高；随Ｎｂ含量ｘ的增加，最佳软磁性能下合金显微组织结构中的αＦｅ－Ｓｉ纳米晶晶粒尺寸Ｄ、Ｓｉ含量、体积分数Ｖ＿ｃ均呈下降趋势，非晶相的短程有序范围δ增大；合金的磁性除与αＦｅ－Ｓｉ纳米晶有关外，还与合金中非晶相密切相关。用新近提出的双相无规磁各向异性模型讨论了合金的磁性与结构的关系。
The effect of Nb content on the structure and magnetism of Fe_ (76.5-x) Cu_ (1.0) Nb_xSi_ (13.5) B_ (9.0) nanocrystalline soft magnetic alloys was investigated. The results show that when the content of N6 is about 3at%, the soft properties of the alloy are the highest. With the increase of Nb content, the size of αFe-Si nanocrystals in the microstructure of the alloy with the best soft magnetic properties , Si content and volume fraction V_c all decreased, and the short-range ordered range δ of amorphous phase increased. In addition to the αFe-Si nanocrystal, the magnetic properties of the alloy were also closely related to the amorphous phase in the alloy. The relationship between magnetism and structure of the alloy was discussed with the newly proposed biphase random magnetic anisotropy model.