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1. 解放军理工大学理学院
2. 中国科学技术大学国家同步辐射实验室
3. 中国科学院高能物理研究所同步辐射室
4. 河海大学理学院,南京,210007
5. ,南京,210098
纸质出版日期:2003-12-01
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[1]卞清,谢治,张静,阎文胜,韦世强,殷士龙.机械合金化Fe_(0.6)Ni_(0.4)体系的结构研究[J].核技术,2003(12):914-917.
BIANQing XIE Zhi ZHANG Jing YAN Wensheng WEI Shiqiang YIN Shilong. Microstructures of mechanically alloyed Fe0.6Ni0.4[J]. Nuclear techniques, 2003, (12): 914-917.
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.
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