The Study On The Soft Magnetic Properties Of New Fe-based Amorphous Alloy

Fe-based amorphous alloys have excellent soft magnetic properties and a large glass-forming ability is one of the hotspots of the amorphous alloy, especially in the last ten years, Fe-based nanocrystalline soft magnetic alloy has important industrial application, In this paper, a self-designed FeSiCP amorphous alloy melt-spinning prepared amorphous bands have excellent soft magnetic properties and high glass-forming ability, the amorphous formation FeSiCPCu adding Cu alloy crystallization annealing after the excellent soft magnetic properties than amorphous. Carried out the following research around this topic:(1) Design components of the eutectic point from Fe8oSi3C5P12、Fe8oSi3C4P13and Fe8oSi3C3P14alloy use vacuum melting furnace smelting master alloy,and using the induction vacuum melt-spinning equipment preparation of amorphous ribbons, using XRD diffraction (XRD) analysis of the amorphous structure, measured by differential thermal analyzer thermalst ability,which Fe8oSi3C3P14amorphous alloy wide super cooled liquid region△TX=42K.(2) VSM analysis of Fe8oSi3C5P12、Fe80Si3C4P13and Fe8oSi3C3P14three kinds of amorphous alloy the three amorphous alloy saturation magnetization were1.28T、1.29T and1.35T.(3) Above three amorphous alloy strip to the stress of the vacuum annealing, the holding time of8min,cooling conditions for the water quenched. Which Fe80Si3C3P14M amorphous alloy after328℃vacuum annealing initial permeability μ0for6960, and the coercivity Hc as4.879A/m. Three of amorphous alloy coercivity first decrease and then increase the trend with the prolongation of the annealing holding time, minimum coercivity of stress relief annealing8min.(4) Select a glass forming the largest capacity Fe80Si3C3P14amorphous alloy in the air using a melt-quenching device alloy strip was prepared, after XRD diffraction analysis of a completely amorphous structure, the saturation magnetization of1.43T. The amorphous strip after to328℃vacuum annealing8min initial permeability μ02945, Hc for5.397A/m. (5) Fe8oSi3C3P14amorphous alloy by adding0.2%and0.5%of Cu. Alternative Fe element by vacuum melt quenching the Preparation Fe79.8Si3C3P14Cu0.2and Fe79.5Si3C3P14Cuo.5two kinds of amorphous alloy strip, VSM analysis.The saturation magnetization were1.25T and1.18T. Subsequent vacuum annealing treatment at328℃、465℃and475℃respectively, the time after328℃annealing for8min, the coercive force of the two alloys Min, where in Fe79.5Si3C3P14Cuo.5amorphous alloy after a465℃vacuum annealing8min initial permeability μ09480, and the coercive force Hc6.663A/m. On the annealed alloy strips with the XRD diffraction analysis, where in the Cu content of0.2%, still amorphous after465℃annealing, when the Cu content increased to0.5%, there is a small amount the a-Fe grains appears. Two kinds of amorphous alloy at475℃annealing have grain precipitation type is precipitated with increasing Cu content, grain size, grain size smaller.