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本文研究了不同退火温度下Ｆｅ（７８．５）Ｃｕ（１．０）Ｎｂ（８．０）Ｓｉ（１３．５）Ｂ９纳米软磁合金的显微结构与磁性特征。结果表明：当退火温度Ｔａ＝５３５℃时，合金具有最佳软磁性能，其起始磁导率μｉ为１４．８×１０４。合金中αＦｅ－Ｓｉ纳米晶的晶粒尺寸ｄ及Ｓｉ含量对退火温度不很敏感，当Ｔａ＝４９５～５７５℃时，ｄ为１０．６５～１１．８７ｎｍ，Ｓｉ含量为１８．８７～２１．０１ａｔ％，而非晶相的体积分数ＶＡ及短程有序范围δ则随退火温度变化较大。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，在αＦｅ－Ｓｉ纳米晶的ｄ为１０．６５ｎｍ、Ｓｉ含量为２０．５６ａｔ％、非晶相的ＶＡ为０．３３、δ为１．４３ｎｍ下，合金具有最佳软磁性能。并用新近提出的双相无规各向异性模型分析了纳米软磁合金显微结构与磁性的关系。
In this paper, the microstructure and magnetic properties of Fe (78.5) Cu (1.0) Nb (8.0) Si (13.5) B9 nano-soft magnetic alloys at different annealing temperatures were studied. The results show that when the annealing temperature is Ta = 535 ℃, the alloy has the best soft magnetic properties and the initial permeability μi is 14.8 × 104. The grain size d and Si content of αFe-Si nanocrystals are not very sensitive to the annealing temperature. When Ta = 495 ~ 575 ℃, d is 10.65 ~ 11.87nm and the Si content is 18.87 ~ 21. 01at%, while the volume fraction of non-crystalline phase VA and short range order range δ with the annealing temperature changes. In addition to the magnetic properties of the alloy αFe-Si nanocrystals, but also with the alloy amorphous phase is closely related to the α-Fe-Si nanocrystalline d is 10.65nm, Si content of 20.56at%, amorphous VA 0.33, δ is 1.43nm, the alloy has the best soft magnetic properties. The relationship between the microstructure and magnetic properties of nanocrystalline soft magnetic alloys was analyzed with the newly proposed biphasic random anisotropy model.