铁基非晶纳米复合材料的结构及磁性能研究

Study on Microstructure and Magnetic Properties of Fe-based Amorphous Nano-composite

对铁基非晶合金样品Fe65Ni1Al5Ga2P8.65B9.6Si3C5.75采用不同的预处理方式,利用XRD、TEM、SEM和VSM对样品的结构和磁学性能进行研究。结果表明,经过深冷+循环退火预处理之后,样品的原子结构发生弛豫,原子之间发生聚集,形成许多原子集团,原子之间的有序性和致密性增加。在部分晶化处理时,拥有较多原子集团的预处理非晶合金比淬态合金能够提供更多的形核核心,得到的晶粒尺寸更小,分布更加均匀,析出相的种类也更多,且非晶样品的晶化动力学和热力学过程也发生改变。预处理样品的软磁性能比淬态更优异。

The microstructure and magnetic properties of iron-based amorphous alloy Fe65 Ni1 Al5 Ga2 P8.65 B9. 6 Si3 C5.75 pretreated in different ways were studied with XRD, TEM, SEM and VSM. The results show that after copious cooling and cycle annealing pretreatment, atomic structure is relaxed, atomic groups are ob- served with an aggregation of atoms, meanwhile order and dense between atoms are strengthened. During segmental crystallization processing, more nucleation cores are provided by pretreated amorphous samples which, compared with quenched samples, have more atomic groups, and particles with smaller grain size, more uniform grain distribution and precipitate phase species are produced. Moreover, the processes of dy- namics and thermodynamics are also changed. The soft magnetic properties of pretreated samples are bet- ter than those of quenched samples.