Effect of fluxing treatment on the amorphous forming ability and magnetic properties of FeBP alloy

Abstract The effects of the fluxing treatment of B2O3 and MnO on the amorphous forming ability (AFA) and magnetic properties of the Fe85B10P5 alloy prepared with raw materials were investigated. Results indicate that the B2O3-MnO fluxing treatment can significantly improve the AFA of the Fe85B10P5 alloy. The Curie temperatures (Tc) first decrease and then increase with increasing MnO content. The variation of Tc consists well with the change of the position of the diffraction peak corresponding to (2 0 0) plane of α-Fe in the annealed ribbons. It has been proved that using MnO instead of CaO during fluxing treatment for the Fe85B10P5 alloy can achieve a better protection for the P element. However, this fluxing agency makes influences on the variation of Fe and Mn elements, which will influence the Bs of Fe-based amorphous alloys.