Effects Of Adding Sn And Ag Elements On The Properties Of FeSiBP Amorphous Alloy

Fe-based amorphous alloys have excellent properties such as high strength,hardness,elasticity,high magnetic permeability,high saturation magnetic induction,low coercive force,and low iron loss,which are becoming smaller and lighter in electronic components.With the trend of miniaturization,light weight,energy saving,high frequency,intelligence and high current of electronic components,it has become a hot focus of attention.However,at present,the plastic deformation ability of Fe-based amorphous alloys is generally poor.In the practical application of engineering,sudden breaks due to local stress concentration are often generated,which makes it restrictive in many industrial production activities.Therefore,in order to make it better in industrial applications,studying the plastic deformation and improvement mechanisms of Fe-based amorphous alloys and improving their room temperature ductility and fracture toughness are of great significance to the development of amorphous alloys,which has been a research hotspot in the field of amorphous materials for a long time.In this paper,based on the mechanism that adding an element with positive mixing enthalpy with Fe can promote phase separation,and it is easy to form bcc-Fe inside,thereby inducing the formation of nanoclusters in the amorphous matrix,adding a small amount of Sn and Ag to the FeSiBP amorphous alloy matrix without plastic deformation ability,and studying the effects of the addition of these two elements on the amorphous formation energy,mechanical properties,and soft magnetic properties of the Fe-based amorphous alloy.The effects of adding these two elements on their properties will be compared.It is hoped that the plastic deformation ability will be improved while maintaining high amorphous formation energy and magnetic properties.The main findings are as follows:?1?(Fe_0.76Si_0.096B_0.084P_0.06)_100-xSn_x/Ag_x?x=0-0.6?amorphous alloy round rod was successfully prepared by copper mold casting method,and amorphous was successfully prepared by single-roll liquid quenching method Sample of alloy strip.?2?In the FeSiBPSn alloy system,with the increase of the Sn element content,the amorphous formation energy will be greatly reduced.When 0.3at% Sn element is added,the alloy system shows the best plastic deformation ability,and its yield The strength and elastic modulus were 3230 MPa and 162 GPa,respectively,and the amount of plastic deformation increased from 0.7% to 2.2% when Sn was not added.In the FeSiBPAg alloy system,the enthalpy of mixing between Fe and Ag is greater than the enthalpy of mixing with Cu and Sn.As the amount of Ag increases,the amorphous formation can be greatly reduced,and brittleness is easily induced.The production of metal compounds causes brittle fracture of amorphous alloys,which cannot cause plastic deformation.?3?With the addition of Sn and Ag elements,the saturation magnetic induction decreases.At the same time,bcc-Fe nanoclusters were induced to be dispersed in the amorphous alloy matrix due to the trace addition of Sn and Ag elements.Nanoclusters play a pinning role in the process of magnetization,hindering the movement of magnetic domain walls,so the coercive force increases and the soft magnetic properties decrease.