机械合金化Fe_(0.6)Ni_(0.4)体系的结构研究  

Microstructures of mechanically alloyed Fe_(0.6)Ni_(0.4)

作　　者：卞清[1] 谢治[2] 张静[3] 阎文胜[2] 韦世强[2] 殷士龙[4] 

机构地区：[1]解放军理工大学理学院,南京210007 [2]中国科学技术大学国家同步辐射实验室,合肥230029 [3]中国科学院高能物理研究所同步辐射室,北京100039 [4]河海大学理学院,南京210098

出　　处：《核技术》2003年第12期914-917,共4页Nuclear Techniques

摘　　要：利用XAFS(X射线吸收精细结构)和XRD(X射线衍射)方法研究了机械合金化Fe_(0.6)Ni_(0.4)系统在制备过程中的晶体结构和Fe原子的局域配位环境。结果表明,球磨5h,样品中Fe、Ni原子开始产生合金化,但仍然为bcc和fcc混合的两种物相;球磨10h后,bcc结构Fe的特征配位峰消失,转化为fcc结构,随着球磨时间的增加,配位无序度逐渐增大;球磨40h后,Fe原子的近邻结构又有新的变化,是由多种物态组成的混合物。Structures of the mechanically alloyed Fe0.6Ni0.4 after milling for 5, 10, 20, 40 h were investigated by X-ray absorption fine structure (XAFS) and X-ray diffraction (XRD). The results show that after milling for 5 h the patterns with bcc-like structure of a-Fe and with fee-like structure of Ni were observed. After milling for 10-20h the patterns with bcc-like structure of a-Fe disappeared, and only the patterns with fee-like structure were observed. After milling for 40 h the weak patterns with bcc-like structure appeared again. So the mechanically alloyed Fe0.6Ni0.4 after milling for 40 h is not a homogeneous supersaturated solid solution.

关 键 词：X射线吸收精细结构 X射线衍射 机械合金化 Fe0.6Ni0.4系统 磁性材料 铁镍合金 

分 类 号：TM271.3[一般工业技术—材料科学与工程] TG146.15[电气工程—电工理论与新技术]