Preparation and Magnetic Properties of Amorphous- and Nanocrystalline-alloys of FeCuNbSiB with high Fe-content

Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《材料研究学报》

王葛 鲍金锋 王兴华 陈玉鹤 周富伟 李强

Abstract： The effect of transition metal elements, such as Zr, Nb, Mo and Cu on the amorphous forming ability, thermal stability and magnetic propertywere investigated for the Fe78Si9B13 alloy.By varying the Fe content of the Fe74Cu1Si13B9Nb3amorphous alloy, two series alloys, i.e. Fe(76+x)Cu1Nb3Si(11-x)B9(x=0, 2, 4) and Fe(79 + x)Cu1Nb2Si(6- x)B12(x=0, 2, 4) amorphous- and nanocrystalline- alloyswere prepared and finally their ribbons were producedby melt- spinning.The microstructures and magnetic properties of the prepared ribbonswere investigated by XRD, DSC, TEM and VSM etc. and the soft magnetic properties ofthe high Fe content alloyswere optimized by increasing the content of Nb.The results showed that theelements of Zr and Nb can effectively improve the amorphous forming ability and thermal stability of Fe78Si9B13 alloys; A seriesFe-Cu-Nb-Si-B amorphous- and nanocrystalline- alloys with Fe content >80% (atomic fraction) were successfully prepared, themicrostructures of which are typically composed of dual amorphous- and nanocrystalline-phase. Their saturation magnetizations Bs are larger than 180emu/g and coercivitiesHcare between 2Oe and 9Oe, which means the alloys exhibit a good soft magnetic property. Thecoercivity would be reducedsince the grain size would be refined and thus the soft magnetic properties would be significantly improved as the Nbcontent increases. When the Fe content is between 80% (atomic fraction) and 83% (atomic fraction), the alloyswould exhibit an excellent soft magnetic property but when the Fe content comes to 85% (atomic fraction), phases of Fe2B and Fe3B would be precipitated that would furiouslydeterioratethe soft magnetic properties of the alloys.

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