The Study On The Preparation And Soft Magnetic Properties Of FeZrB-type Fe-based Amorphous And Nanocrystalline Alloys

Fe-based amorphous and nanocrystalline soft magnetic alloy is a new kind of functional material, which has excellent soft magnetic properties, such as high saturation magnetic induction, high permeability, low coercivity and so on. With the development of technology, especially in the electronic technology, communications and other fields, Fe-based amorphous and nanocrystalline soft magnetic alloy has got the opportunity of development.In this paper, based on the previous series researches in the Fe MB, FeZrB based amorphous nanocrystalline soft magnetic alloy was studied through the improvement of composition, annealing process and other ways. The amorphous ribbons were prepared by utilizing single roller melt-spinning method. The annealing process was designed according to the results of XRD and DSC, and the amorphous alloy forming ability, thermal stability and soft magnetic properties of the system were investigated by VSM test.Firstly, the composition of Fe₈₄(Zr_xNb_1-x)7B₉（x=0.2 、 0.4 、 0.6 、 0.8） and Fe（84+x）Zr_4.2Nb_2.8B（9-x）（x=2 、 4 、 6 、 8） alloy ribbons was prepared by single roller melt-spinning method. Based on the analysis results of XRD, DSC and VSM, Fe₈₄Zr_4.2Nb_2.8B₉ has excellent amorphous forming ability, soft magnetic properties and a large ΔTx, then the samples were annealed by different heat treatment processes, and the hardness test and bending test were carried out.Secondly, the Tx1 of the Fe₈₄Zr_4.2Nb_2.8B₉ amorphous alloy at different heating rates were linearly fitted and one time decay fitted, and estimated its Tx in the ideal state and the crystallization temperature was 503.46 C in the ideal state. And the activation energy of the alloy was calculated by the method of Kissinger and Ozawa respectively.Fe（83.5+x）Zr_4.2Nb_2.8B（9-x）Cu0.5（x=2、4、6、8）and Fe（83+x）Zr_4.2Nb_2.8B（9-x）Cu1（x=2、4、6、8） alloys were got by adding Cu element in the FeZrB based amorphous alloy. Combined with XRD、DSC、 VSM and other experimental study, the effect of Cu element on the amorphous forming ability and soft magnetic properties of the alloy system was analyzed.