An X-ray study of the dissociation of an alloy of copper, iron and nickel
An X-ray study of the dissociation of an alloy of copper, iron and nickel
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DOI：
10.1098/rspa.1943.0014
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发表时间：
1943-07
期刊：
影响因子：
--
通讯作者：
V. Daniel;H. Lipson
中科院分区：
文献类型：
--
作者：
V. Daniel;H. Lipson
描述了Cu4FeNi3合金在从一个面心立方结构分裂成两个过程中所表现出的不寻常的X射线衍射效应。在布拉德利描述的四方结构形成之前，会形成一种状态，其中粉末照片的每条线都伴随着相当强的边带。对此给出了解释，并显示与 X 射线照片中的大多数定量数据合理一致。这种解释是，原始立方晶格由于不同原子的偏聚而发生规则变形。从边带的位置可以估计变形的方向及其平均波长。然而，强度与理论不相符。它们并不完全按照预测的方式变化。然而，结果表明，与任何其他结构调制相比，这种变化与这种结构调制更一致，但到目前为止，还没有发现可能找到任何能够以所需方式修改边带强度的因素。
A description is given of the unusual X-ray diffraction effects shown by the alloy Cu4FeNi3 while it is in the process of splitting up from one face-centred cubic structure into two. Before the formation of the tetragonal structures described by Bradley a state is formed in which each line of a powder photograph is accompanied by quite strong side-bands. An explanation of this is given and is shown to be in reasonable agreement with most of the quantitative data from the X-ray photographs. This explanation is that the original cubic lattice is regularly deformed by the segregation of the different atoms. From the positions of the side-bands the directions of the deformations and their average wave-length can be estimated. The intensities, however, do not fit in with the theory; they do not vary exactly in the way predicted. It is shown, however, that the variation is in closer agreement with this sort of modulation of the structure than with any other, but it has not, so far, been found possible to find any factor that will modify the intensities of the side-bands in the way required.