Mo含量对Fe_(40)Co_(40)Zr_((10-x))Mo_xB_9Cu_1(x=0,2,4)合金的微观结构,热性能和磁性能的影响

采用单辊快淬法制备Fe_(40)Co_(40)Zr_((10-x))Mo_xB_9Cu_1(x=0,2,4)系非晶合金,并对3种合金进行不同温度热处理。利用X射线衍射仪(XRD)、透射电镜(TEM)、差热分析仪(DTA)和振动样品磁强计(VSM)对合金的微观结构、热性能和磁性能进行测试分析。结果表明:Fe_(40)Co_(40)Zr_((10-x))Mo_xB_9Cu_1(x=0,2,4)3种合金第1个晶化峰的激活能随Mo含量的增加而减小,Mo的添加不利于合金的热稳定性。Mo含量的增加抑制了ZrCo_3B_2等化合物的析出,细化了结晶相的晶粒尺寸。Fe_(40)Co_(40)Zr_((10-x))Mo_xB_9Cu_1(x=0,2,4)3种非晶合金的矫顽力Hc均随退火温度的升高而逐渐增大。Mo的添加明显降低了合金的矫顽力。

The effect of Mo content on the microstructures, thermal properties and magnetic properties of Fe40Co40Zr(10-x)MoxB9Cu1(x=0,2,4) alloys

Fe40Co40Zr(10-x)MoxB9Cu1(x=0,2,4) amorphous alloys were prepared by the single roller melt-spinning and isothermally annealed at different temperatures. Microstructures, thermal properties and magnetic properties of the samples were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), differential thermal analysis (DTA) and vibrating sample magnetometer (VSM). The results show that the apparent activation energies of Fe40Co40Zr(10-x)MoxB9Cu1(x=0,2,4) alloys decreases with the increase of the Mo content. Mo addition reduces the thermal property of the alloys. The increase of Mo content inhibits the precipitation of ZrCo3B2 compounds and refines the grain size of the alloys. Coercivity (Hc) of Fe40Co40MoxZr(10-x)B9Cu1(x=0,2,4) alloys increases with the increasing of annealing temperature gradually. Mo addition reduces the Hc obviously.