铁基非晶纳米复合材料结构及磁学性能 - 有色金属（冶炼部分）.docVIP

铁基非晶纳米复合材料的结构及磁性能212013） 摘要：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。结果表明过深冷+循环退火预处理之后样品原子结构发生弛豫，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。部分晶化处理时，拥有较多原子集团的预处理非晶合金淬态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。 关键词：循环退火预处理团簇弛豫磁性能TG139+.8 文献标志码：A 文章编号：1007-7545（2013）12-0000-00 Study on Microstructure and Magnetic Properties of Fe-based Amorphous Nano-composite YIN Fu-xiao, FU Ming-xi, ZHU Juan-juan, LI Peng, ZHU Zong-qiang, LI Bing-yi (School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China) Abstract: The microstructure and magnetic properties of iron-based amorphous alloy Fe65Ni1Al5Ga2P8.65B9.6Si3C5.75 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 observed 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 dynamics and thermodynamics are also changed. The soft magnetic properties of pretreated samples are better than those of quenched samples. Key words: cycle annealing pretreatment, clusters, relaxation, soft magnetic properties 近年来，铁基非晶纳米晶材料由于其优异的软磁性能受到广泛6]。对铁基非晶合金进行退火处理后，在合金内部能够得到尺寸为纳米级的α而超细晶粒之间的紧密结合作用形成了优良的软磁性能7-10]。非晶态合金作为一种新材料，其优异的物理、化学、力学性能，往往是现有金属材料所不具备的。傅明喜11]的研究表明，对非晶合金内部原子的结构、分布、亚结构的产生和原子的排布有一定的影响。本文深冷+循环退火预处理对基非晶合金样品结构、非晶纳米合金的晶粒度、晶化相的分布、磁性能的影响。 试验试验原料为纯、纯、纯、纯、P-Fe、B-Fe、Si-Fe、高纯石墨颗粒。首先将纯和石墨颗粒放入真空感应炉中制备出均匀的母合金，再将母合金采用单辊旋淬法制备出宽约10 mm厚20~25 μm的Fe65Ni1Al5Ga2P8.65B9.6Si3C5.75非晶条带。 深冷+循环预处理首先将试样进行液氮深冷处理，之后使用ISSP-HTF气氛热处理程控高温炉对样品在进行预处理预处理循环次数为次。试样采用D/MAXRA型X射线