Nb对Fe-Co基合金非晶形成能力及磁性能的影响

Effect of Nb Addition on Glass-Forming Ability and Magnetic Properties of Fe-Co Based Alloy

摘要:

利用铜模吸铸法制备(Fe0.5Co0.5)71-xNbxZr3Nd4B22(x=0~10)系块体合金，研究合金元素Nb的添加对该体系合金非晶形成能力(GFA)和磁性能的影响。结果表明，适当Nb的添加能有效提高合金的非晶形成能力。当Nb含量为5at%时，可获得具有完全非晶结构的块体非晶合金，该合金呈现典型的软磁性能，饱和磁化强度(Ms)为79 Am2/kg；合金的晶化温度(Tx)为957 K，晶化激活能E为538.30 kJ/mol。

Abstract:

The (Fe0.5Co0.5)71-xNbxZr3Nd4B22 bulk alloys (x=0-10) were prepared by suction casting into a copper mould. The effects of Nb addition on glass-forming ability (GFA) and magnetic properties of the alloys were investigated. Results show that proper addition of Nb can increase the GFA of the alloy effectively. When the Nb content reached 5at%, a new bulk amorphous alloy, (Fe0.5Co0.5)66Nb5Zr3Nd4B22 with fully amorphous structure was obtained. The amorphous alloy exhibits typical soft magnetic property, and the saturation magnetization (Ms) is 79 Am2/kg. Its crystallization temperature (Tx) and crystallization activation energy of the alloy are 957 K and 538.30 kJ/mol, respectively.