| Iron-based amorphous alloys have excellent soft magnetic properties,and have been widely used in common-mode inductors,transformers,transformers and other fields,and have broad application prospects in extreme service environments such as UHV and nuclear industries.It is of great significance to develop and apply the composition of amorphous alloys to develop the microstructure evolution and performance changes of amorphous alloys under the strong external field environment such as strong electric field and irradiation.However,there is currently little research on the effect of strong external field effects on amorphous alloys.Based on this,this paper takes the iron-based amorphous thin strip material as the research object,uses strong electric field treatment and irradiation treatment,studies and analyzes the structural properties before and after the strong external field treatment,and clarifies the evolution of the microstructure and its performance influences under the strong external field.The main contents and conclusions of this article are as follows:(1)Selection of amorphous alloy and phase analysis.The Fe70Si14B12Nb3Cu1 iron-based amorphous thin strip(1K107S type)was successfully prepared.Through process exploration,the best process parameters were determined:using a vacuum copper roll stripping machine,under an argon atmosphere,with a spray pressure of 100Pa and a copper roll speed of 25m/s,iron with a thickness of 20±1?m,a width of 10±0.5mm,and a good surface quality was prepared Amorphous thin strip.In the pilot test,a 5 kg continuous thin strip with a width of 10 mm and a thickness of 20 mm and a thickness of 22 ?m was prepared.(2)Study the influence of strong electric field on the iron-based amorphous thin strip.The instantaneous electric shock treatment of the iron-based amorphous ribbon showed that the phase structure of the two alloys did not change macroscopically,but the microstructural analysis showed that the S-type atomic order increased more,indicating that the electric shock treatment was beneficial to the crystal.Electroshock has little effect on the crystallization temperature of two iron-based amorphous alloys.The results of studies on magnetic properties show that the coercivity,saturation magnetization and residual magnetization of S-type and FT-8 iron-based amorphous ribbons are all increased,indicating that the electric shock effect has an effect on the short-range ordered clusters of amorphous alloy,which in turn affects the magnetic properties.(3)Study the influence of irradiation treatment on the phase and properties of amorphous alloys.The results show that the irradiation treatment did not change the phase of the two iron-based amorphous alloys greatly,but the analysis of the microstructure shows that the atomic order of the S-type alloy will become larger,which is beneficial to crystallization.The atomic order of the FT-8 alloy will become smaller.Studies on the crystallization behavior show that the difference in temperature between crystallization peaks(?Tx)of the S-type alloy is slightly lower,and that of the FT-8 alloy is increased.The results of the magnetic properties show that the coercivity,saturation magnetization and residual magnetization of the S-type and FT-8 iron-based amorphous ribbon become larger.According to the Kissinger method,the initial crystallization activation energy of the iron-based amorphous ribbon is calculated.The results show that the thermal stability of FT-8 is better,and because the amorphous state is more stable after irradiation treatment,it is known that FT-8 iron Amorphous thin ribbon has strong radiation resistance.Studies have shown that extreme effects such as strong electric fields/irradiation have different effects on the phases of different amorphous thin strips.The results of the research have a certain reference value in the development of new amorphous alloys and the effects of extreme conditions on the structure and magnetic properties of amorphous alloys. |
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