Strong Magnetic Relaxation Of Amorphous Soft Magnetic Alloy Nicofesi And Crystallization Research

As a kind of metastable phase, amorphous alloy will change towards to crystalline phase when heated. And structure relaxation will take place if an amorphous alloy is annealed under the temperature Tg, which can influence the latter crystallization. The crystallization is related with the heat treatment condition, time and other conditions. The amorphous soft magnetic alloy and nanometer soft magnetic alloy developed recently are a kind of new good function material, and a lot of research works have been carried on structure relaxation and crystallization of the amorphous material. The high magnetic field can change the microstructure and have important influence on the structure and performance of material.The high magnetic field is a kind of very good tool for studying the material. Based on this, here the relaxation of the amorphous soft magnetic alloy NiCoFeSi under temperature Tg and the influence of anneal conditions have been investigated at the presence of high magnetic field. The results show that this kind of alloy has two stages during crystallization process. The pre-relaxation enhances the crystallization activation energy and makes the crystallization take place earlier. The high magnetic field has more influence on this and accelerates the precipitating of one cluster. The analysis of XRD, resistivity p and coerciveforce Hc has the same conclusion. The high magnetic field brings out FeNi3 phase to appear earlier, makes the resistivity drop and coercive force rise. And the high magnetic field cause the aberrance of crystal lattice of the crystallization phase, influence the atom order arrange of the alloy.