Fe_（76．5－x）Cu_1Nb_xSi_（13．5）B_9纳米晶合金的结构和磁性研究

THE STRUCTURE AND MAGNETIC PROPERTIES OF NANOCRYSTALLINE Fe_(76.5-x)Cu_1Nb_xSi_(13.5)B_9 ALLOYS

本文研究了Ｆｅ（７６．５－ｘ）Ｃｕ１ＮｂｘＳｉ（１３．５）Ｂ９纳米晶合金中Ｎｂ含量的变化（ｘ＝１－７）对结构和磁性的影响。结果表明，随ｘ值的增高，α－Ｆｅ（Ｓｉ）纳米晶相的尺寸减小，体积分数，含Ｓｉ量及其ＤＯ_３有序度降低。Ｎｂ含量对残余非晶相的结构有影响。合金的饱和磁致伸缩系数（λｓ）随ｘ值的增加而增大，在ｘ＝３时，合金的起始磁导率（μｉ）最大，矫顽力（Ｈｃ）最小。

The effects of the Nb content on the structure and magnetic properties of the nanocrystalline Fe_(76.5-x)Cu_1Nb_xSi_(13.5)B_9 alloys have been studied.The grain size of the α-Fe(Si) decreases with increasing Nb content,x.. Meanwhile,the volume fractiont the Si content and the degree of order of the DO_3 order zone in the α-Fe(Si)decrease.The Nb content in the nanocrystalline Fe_(76.5-x)Cu_1Nb_x Si_(13.5)B_9 alloy has an effect on the structure of the residual amorphous phase. The magnetostriction of the alloys increases with increasing x. The maximal initial permeability and the minimal coercivity are obtained with x=3.