纳米晶软磁材料Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9中子衍射研究  

Diffraction Study on the Nanocrystalline Soft Magnetic Material Fe_(73.5)Cu_1Nb_3Si_(13.5) B_9

作　　者：刘蕴韬[1] 李际周[1] 卢志超 杨继廉[1] 叶春堂[1] 肖红文[1] 

机构地区：[1]中国原子能科学研究院核物理研究所,北京102413 [2]国家非晶微晶合金工程技术研究中心,北京100081

出　　处：《原子能科学技术》2000年第z1期1-4,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目! (5 98710 46 );核工业基金资助项目! (Y7197B0 117)

摘　　要：用中子衍射技术研究了 3种不同热处理温度下形成的纳米晶软磁材料Fe73 .5Cu1Nb3Si13 .5B9的内部微观结构及其随热处理温度的变化。实验结果表明 :Fe73 .5Cu1Nb3Si13 .5B9非晶经等温热处理 1h后 ,生成的是高度有序的DO3结构的固溶体Fe3Si(Fe)。首次确定了Si主要占据 4a位 ,Fe除少量占据 4a位外 ,主要占 4b和 8c位 ,并定量地给出了上述 3种样品的Si的占位数和平均晶粒尺寸。另外 ,热处理温度为 853K时 ,样品晶胞变大 ,有部分B原子进入 4 8h位。热处理温度为82 3K时 ,样品具有最高的Si含量 (原子百分比 19 8% )和最小的晶粒尺寸 ( 8 9nm) ,这可能是样品有最佳软磁性能的原因。Neutron diffraction is performed on samples of the nanocrystalline soft magnetic material Fe73．5Cu1Nb3Si13．5B9 which are anealed at three different temperature for 1 h respectively.Results reveal that amorphous ribbons of Fe73．5Cu1Nb3Si13．5B9 are turned into a well ordering solid solution Fe3Si(Fe) with DO3 structure which is different from the Fe(Si) solid solution with bcc structure after they were annealed.And Si atoms and a few Fe atoms occupy the 4a site and Fe atoms mainly occupy the 4b and 8c sites,and the content of Si atom as well as the average grain dimension of nanocrystalline.Especialy,the reason that cell parameter enlarged is some B atoms go into the 48h site in 3＃(853 K) sample.It is obvious that 2＃(823 K) sample has the highest content of Si atom and the minimum average grain dimension(8.9 nm) comparing the results of the three samples.It seems the reason that the 2＃(823 K) sample has the best soft magnetism properties.

关 键 词：纳米晶软磁材料 FE73.5CU1NB3SI13.5B9 中子衍射 

分 类 号：TL[核科学技术]