Abstract
A series of Fe40Co40Zr8M2B10 (M=Nb, V, Cr, Ti, W, Al) alloys were prepared using melt-spinning. The thermal curve, structure and magnetic property of alloys are examined. Because of different negative heat of mixing between elements, only Fe40Co40Zr8M2B10 (M=Nb, V, Cr, Ti) alloys form amorphous structure. These amorphous alloys are annealed at different temperatures under vacuum conditions. The crystallization processes of four amorphous alloys are similar. In the primary stage of crystallization process, only α-Fe (Co) phase precipitates and Co element mainly distributes in the residual amorphous. For the four alloys after annealing at 550°C, there is a few differences in saturation magnetization (Ms) and coercivity (Hc) due to their different microstructures.
Highlights
Since the excellent soft magnetic properties, Fe-based nanocrystalline soft magnetic materials have been attracted lots of attentions for a long time
The magnetism of the materials is closely related to their microstructures composed by α-FeCo nanocrystals embedded in amorphous matrix
Grain size is one of the important factor affecting the properties of nanocrystalline soft magnetic materials
Summary
Since the excellent soft magnetic properties, Fe-based nanocrystalline soft magnetic materials have been attracted lots of attentions for a long time. Among the Fe-based nanocrystalline soft magnetic alloys, Hitperm FeCoMB (Cu) alloys as competitive materials for high temperature soft magnetic applications have been developed and attracted lots of attentions in recent years (Han et al, 2014; Babu et al, 2011; Sun et al, 2009; Radon et al, 2018). Grain size is one of the important factor affecting the properties of nanocrystalline soft magnetic materials. Adding transition metal can greatly improve and adjust their microstructure and performance, such as Nb, V, Cr, Ti, W and Al element. The Fe40Co40Zr8M2B10 (M=Nb, V, Cr, Ti, W, Al) alloy system is based on the addition of different transition metals to a conventional Hitperm-like amorphous alloy system. The crystallization processes and magnetic properties of Fe40Co40Zr8M2B10 alloys with different transition metal will be discussed in detail
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