LXXIV. The diffraction of X-rays by an age-hardening alloy of aluminium and copper. The structure of an intermediate phase
LXXIV. The diffraction of X-rays by an age-hardening alloy of aluminium and copper. The structure of an intermediate phase
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DOI：
10.1080/14786443808562177
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发表时间：
1938-11
期刊：
影响因子：
--
通讯作者：
G. D. Preston
中科院分区：
文献类型：
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作者：
G. D. Preston
在最近的一篇论文（1）中，给出了在室温和高温时效硬化的高纯铝与4%（重量）铜的合金单晶的X射线光谱中观察到的效应。本文的第一部分描述了在室温和200 ℃时效硬化过程的第一阶段观察到的变化。特别注意将X射线光谱的变化与金属的硬度相关联。所描述的结果与Guinier（~）及其合作者独立发表的结果一致。在第二部分中的文件的结构相分离的晶体后，在200 ℃下长时间的处理，描述。所有的实验都是在同一个晶体上进行的，该晶体是用应变退火法在直径为1毫米的金属丝中生长的，因此本文形成了在固体中发生的反应的历史。由于某些困难的解释所观察到的衍射效应的内容的第一部分的文件是一个定性的字符，但希望出版的结果将直接注意到这些问题，从而导致他们的解决方案。所研究的反应是在金属中进行的，但研究中所采用的方法一般适用于任何可以以小单晶形式获得的材料;所获得的结果表明，使用X射线分析可以揭示固态化学反应的机理。
I N a recent paper (1) an account was given of an effect observed in the X-ray spectrum of single crystals of an alloy of high purity aluminium with 4 per cent. by weight of copper, age-hardened at room-and elevated temperatures. The first part of the present paper contains a description of the changes observed at differer~ t stages of the age-hardening process at room-temperature and at 200 C., attention being particularly directed to correlating the changes of the X-ray spectrum with the hardness of the metal. The results described are in agreement with those published independently by Guinier (~) and his collaborators. In the second part of the paper the structure of the phase which separates from the crystal after prolonged treatment at 200 C, is described. All the experiments were carried out on the same crystal, grown by the strain-anneal method in a 1 mm. diameter wire, so that the paper forms a history of the reaction taking place in the solid. Owing to certain difficulties in the interpretation of the observed diffraction effects the contents of the first part of the paper are of a qualitative character, but it is hoped that publication of the results will direct attention to these problems and so lead to their solution. The reaction investigated is taking place in a metal, but the methods employed in its study are quite generally applicable to any material obtainable in the form of small single crystals; the results obtained suggest that the use of X-ray analysis may throw light on the mechanism of chemical reactions in the solid state.