新型(Fe,Co)-Zr-RE-B非晶合金的热稳定性和磁性

利用旋铸技术制备了一种新型的含稀土元素的铁基非晶合金。研究了Nd含量对Fe70Co8Zr7-xNdxB15(x=0～6%原子数分数)合金的非晶形成能力、热稳定性和磁性能的影响。当该合金系的Nd含量在0～6%(原子数分数)变化时,其饱和磁感应强度(Js)在1.10T～1.37T范围内变化,矫顽力(Hc)在2.28A/m～8.15A/m范围内变化。Js随Nd含量的增加而增加,当Nd含量为2%和3%时,其Hc值均在3A/m以下,且在Nd含量为2%时,具有最高的非晶形成能力(glassformationability简称GFA)即大的ΔTx(达61K);同时又有良好的软磁性能,其Js和Hc值分别为1.25T和2.28A/m。经对比得出,Fe70Co8Zr5RE2B15(RE=Ce、Pr、Gd和Tb)合金与Fe70Co8Zr5Nd2B15具有相近的非晶形成能力和磁性能。

Thermal Stability and Magnetic Properties of Novel (Fe,Co)-Zr-RE-B Amorphous Alloys

A new type of Fe-based amorphous alloy containing rare earth element was prepared by melt spinning technique. The glass-forming ability (GFA),thermal stability and magnetic properties have been investigated in the composition range of Fe_(70)Co_8Zr_(7-x)Nd_xB_(15) ( x=0 to 6% ). It was found that the saturation magnetization (Js) increases with the increment of the relative content of the Nd for the Fe_(70)Co_8Zr_(7-x)Nd_xB_(15) ( x=0 to 6% ) alloys. The H_C values for the glasses with Nd content of 1%,2% and 3% are below 3 A/m. This paper shows that the Fe_(70)Co_8Zr_5Nd_2B_(15) amorphous alloy has good high GFA and good soft magnetic properties,J_S and H_C is 1.25 T and 2.28 A/m,respectively. The research indicated that the Fe_(70)Co_8Zr_5RE_2B_(15) (RE= Ce,Pr,Gd and Tb) amorphous alloys have the similar GFA and soft magnetic properties to the Fe_(70)Co_8Zr_5Nd_2B_(15) amorphous alloy.