Al-Cu中面内取向Guinier-Preston带的观测

IF 2.5 3区工程技术 Q1 MICROSCOPY

Micron Pub Date : 2023-10-01 DOI:10.1016/j.micron.2023.103504

Johannes Berlin, Tobias Stegmüller, Ferdinand Haider

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引用次数: 0

摘要

众所周知，在自然老化过程中，铝-铜合金中形成的第一个亚稳沉淀是所谓的Guinier-Preston带(GPZ)，即只有一个原子层厚度的{100}平面上的Cu薄片。随着像差校正透射电子显微镜(TEM)的发展，这些血小板的直接观察和成像成为可能，但由于限制，只能看到边缘。在这里，我们表明，在适当的条件下，在平面视图中观察是可能的，并允许进一步了解gp区域的形状和排列。此外，这表明在Al原子柱中单原子检测一个Cu原子是可能的。

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Observation of in-plane oriented Guinier-Preston zones in Al-Cu

Known for a long time, the first metastable precipitate which forms in Al-Cu alloys during natural ageing are the so-called Guinier-Preston zones (GPZ), platelets of Cu on {100} planes of only one atomic layer thickness. Only with the development of aberration corrected transmission electron microscopes (TEM), direct observation and imaging of these platelets was possible, but with the restriction, that only edge view was possible. Here we show that under appropriate conditions an observation in a plan-view is possible and allows further insight into the shape and arrangement of the GP-zones. Furthermore, this demonstrates that single atom detection of one Cu atom in a column of Al atoms is possible.

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来源期刊

Micron 工程技术-显微镜技术

CiteScore

4.30

自引率

4.20%

发文量

100

审稿时长

31 days

期刊介绍： Micron is an interdisciplinary forum for all work that involves new applications of microscopy or where advanced microscopy plays a central role. The journal will publish on the design, methods, application, practice or theory of microscopy and microanalysis, including reports on optical, electron-beam, X-ray microtomography, and scanning-probe systems. It also aims at the regular publication of review papers, short communications, as well as thematic issues on contemporary developments in microscopy and microanalysis. The journal embraces original research in which microscopy has contributed significantly to knowledge in biology, life science, nanoscience and nanotechnology, materials science and engineering.