Cu clustering and Si partitioning in the early crystallization stage of an Fe73.5Si13.5B9Nb3Cu1 amorphous alloy
Cu clustering and Si partitioning in the early crystallization stage of an Fe73.5Si13.5B9Nb3Cu1 amorphous alloy
复制标题
DOI：
10.1016/s1359-6454(98)00392-9
复制
发表时间：
1999-02-05
期刊：
影响因子：
9.4
通讯作者：
Onodera, H
中科院分区：
文献类型：
--
作者：
Hono, K;Ping, DH;Onodera, H
用三维原子探针（3DAP）和高分辨电子显微镜（HREM）研究了Fe_（73.5）Si_（13.5）B_9 Nb_3Cu_1非晶合金晶化初期的溶质原子团簇和分配行为。从3DAP的结果已经清楚地表明，Cu原子簇存在于非晶态退火后低于结晶温度。这些团簇的密度在10（24）/m（3）的数量级，这与最佳纳米晶体微结构中的α-Fe晶粒的密度相当。在初级结晶的早期阶段，Cu团簇与α-Fe纳米晶体直接接触，这表明α-Fe初级颗粒在Cu团簇的位置处非均匀成核。在结晶初期。Si在初晶中的浓度低于在非晶基体相中的浓度，这与在初晶化的后期阶段不同，在后期阶段Si以约20原子%的组成分配到α-Fe相中。(C)1999《冶金学报》由爱思唯尔科学有限公司发布。阿里版权所有。
Solute clustering and partitioning behavior in the early crystallization stage of an Fe73.5Si13.5 B9Nb3Cu1 amorphous alloy have been studied by employing a three-dimensional atom probe (3DAP) and a high resolution electron microscope (HREM). Results from the 3DAP have clearly shown that Cu atom clusters are present in the amorphous state after annealing below the crystallization temperature. The density of these clusters is in the order of 10(24)/m(3) which is comparable to that of the alpha-Fe grains in the optimum nanocrystalline microstructure. In the early stage of primary crystallization, Cu clusters are in direct contact with the alpha-Fe nanocrystals, suggesting that the alpha-Fe primary particles are heterogeneously nucleated at the site of Cu clusters. In the early stage of crystallization. the concentration of Si is lower in the primary crystal than in the amorphous matrix phase, unlike in the late stage of the primary crystallization, where Si partitions into the alpha-Fe phase with a composition of approximately 20 at.%. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. Ali rights reserved.