| The amorphous of Fe-based soft magnetic alloy has been called green, environmental and energy-efficient new soft-magnetic material due to it has high magnetic saturation(Bs) and permeability(μi), low coercivity(Hc) and no-load loss(Pc),therefore, scientists put a lot of time, financial resources and energy on it study. In this paper, the problem of Fe Si B amorphous soft magnetic material comparing Fe-3Si soft-magnetic material has relatively Bs has been studied. The Al element wit h amorphous formation ability and prevent the Si and B elements bond with Fe element has been added in the system of Fe Si B amorphous alloy, so the influence of Al element on the amorphous forming ability, thermostability and magnetic properties have been stutied. Cu element added in the opti mal soft-magnetic properties of Fe Si BAl amorphous alloy aim to through nanocrystalline annealing prepared the nanocrystalline soft-magnetic material to enhance the Bs. the influence o f Al and Cu elements on the amorphous formation ability, thermostability and magnetic properties have been researched. Focused on researched th e following aspects surround this subject.(1) Nomi nal components of Fe7 8(Si0. 4 1B0. 5 9) 2 2- xAlx(x=0, 1, 2, 3 and 4) ingot melted by a non- consumable vacuum arc smelting furnace under argon protection, and then the quick quench stripe with width and thickness about 1.3mm and 26μm prepared by rot ating quench method under the 35m/s. microstructure, thermo stability, Bs, Hc and μi have been analyzed by X-Ray Diffraction(XRD), Differential Scanning Calorimetry(DSC), vibrating sample magnetometer(VSM), Dc B-H hysteresis loop and Impedance Analyzer, respectively. The results demonstrated that hi ghest Bs has been achieved when the Al content at 3 at% with 1.58T。(2) Through the research of Fe7 8 + x(Si0. 4 1B0. 5 9)1 9- xAl3(x=0, 1, 2 and 3) alloy, the results manifested that the alloy has good amorphous formation ability and excellent soft-magnetic properties when the Fe content equal to 80 at%, in which the Bs can reach to 1.63 T,the Hc low to 3A·m- 1。The designed alloy has a feature that keeping the Si/B=0.7 was not changed in traditional Fe7 8Si9B1 3 amorphous alloy.(3) The results of studied the Fe8 0(SixBy)1 7Al3(x=0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9) alloy manifested that the highest Bs can reach to 1.67 T wit h Si/B ratio equal t o 0.4. The main reason is that Bs is intrinsic property of soft-magnetic material, so it changed only to related with the changed of alloy’s composition.(4) The results of researched the Fe8 0(Si0. 2 8 6B0. 7 1 4)2 0- xAlx(x=0, 1, 2, 3, 4 and 5) melt-spun ribbons indicated the optimal content of Al is also 3 at% when the optimization of Fe and Si/B content were changed.(5) Through the above researched re sult s, the added Al element can make the initial crystallization peak temperature(Tx 1) moving to lo w temperature and the second crystallization peak temperature(Tx 2) keeping unchanged of Fe Si B amor phous alloy, so it make the ΔT= Tx 2-Tx 1 become larger, so the alloy is hope to be prepared nanocrystallization soft magnetic material though the crystal anneal, but t he results manifested that the α-Fe soft-magnetic phase is easy growing up. The Cu element with promoting the α-Fe phase nucleation added in Fe8 0Si4. 8 6B1 2. 1 4Al3 amorphous alloy with the highest Bs. The DSC curve indicated that Tx 1 continue moves to low temperature, so that the ΔT is not reach t o 5℃on beginning to near 100℃. It can provide a loose process to nanocrystal anneal.(6) Though the different technology of nanocrystal anneal o f Fe8 0(Si0. 3 8B0. 4 7Al0. 1 5)2 0- xCux(X=0.5, 0.75, 1, 1.25 and 1.5)amorphous alloys, the influence of Al element about the nanocrystal process and soft magnetic properties have been analyzed. The result indicated that, with Cu equal to 1 at%, Fe Si BAl Cu amorphous alloy has the optimal soft-magnetic properties under the 450 ℃anneal and 3 minute. The Bs can reach to 1.81 T, Hc low to 5.1A·m- 1and μi to 8493. |
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