合金元素对块体纳米晶Fe3Al材料磁学性能的影响

为了研究合金元素对块体纳米晶Fe3Al材料磁学性能的影响,通过铝热反应熔化法制备了纳米晶Fe3Al以及分别含Ni质量分数10%、Cr质量分数10%、Mn质量分数10%和含Ni质量分数10%-Cu质量分数2%的块体纳米晶Fe3Al.在振动样品磁强计(VSM)上测得合金的磁滞回线,分析其磁性能,采用X射线衍射仪进行结构分析和平均晶粒尺寸计算.结果表明:各样品的磁滞回线呈倾斜状且狭长,磁滞损耗很小;含Ni质量分数10%的样品饱和磁化强度Ms较大,剩余磁化强度Mr和矫顽力Hc较其他样品最小,具有较好的软磁性能;添加合金元素后几种材料的晶粒尺寸变小,磁性能有较大变化,合金元素对纳米晶Fe3Al块体材料的磁性能影响明显.

Effects of alloying elements on magnetic properties of bulk nanocrystalline Fe3Al based materials

The bulk nanocrystalline Fe₃Al and Fe₃Al with Ni10wt%,Cr10wt%,Mn10wt% and Ni10wt%-Cu2wt% elements were prepared by aluminothermic reaction,respectively.The hysteresis loop was measured by vibrating sample magnetometer (VSM),the crystal structures of the samples were characterized by X-ray diffractometer (XRD) and the average grain sizes were calculated.Results show that the magnetic hysteresis loop of the alloys have tilting shape and long narrow,which indicates that the hysteresis loss is small.The saturation magnetization Ms of the Fe₃Al with 10wt% Ni is larger and the residual magnetization Mr and coercivity Hc are smaller than those of other alloys and demonstrate good soft magnetic property.The grain size of Fe₃Al becomes smaller after adding alloying elements,but the magnetic property changes a lot.It could be concluded that the effect of alloying elements on the magnetic property of nanocrystalline Fe₃Al based materials is obvious.