电子辐照下位错的4D电子断层扫描

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Comptes Rendus Physique Pub Date : 2021-06-29 DOI:10.5802/crphys.80

A. Mussi, P. Carrez, K. Gouriet, B. Hue, P. Cordier

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引用次数: 3

摘要

对位错微观结构进行三维成像并监测它们随时间的相互作用是一项重大挑战。在这项研究中，我们表明，在重建之前增强位错线的对比度，可以用更少的图像优化采集阶段，从而跟踪微观结构随时间的三维演变。我们通过研究电子辐照下MgO中螺旋位错形成的第一阶段来说明这种新的可能性。我们强调了分段移动对爬升起始的作用，揭示了优先混合爬升平面的存在。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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4D electron tomography of dislocations undergoing electron irradiation

Imaging dislocation microstructures in 3D and monitoring their interactions over time is a major challenge. In this study, we show that enhancing the contrast of dislocation lines prior to reconstruction, allows to optimize an acquisition phase with fewer images and thus to follow the 3D evolution of a microstructure over time. We illustrate this new possibility by studying the first stages of formation of helical dislocations in MgO under electron irradiation. We highlight the role of segment mobility on the initiation of climb and reveal the existence of preferential mixed climb planes.

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来源期刊

Comptes Rendus Physique 物理-天文与天体物理

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

17.2 weeks

期刊介绍： The Comptes Rendus - Physique are an open acess and peer-reviewed electronic scientific journal publishing original research article. It is one of seven journals published by the Académie des sciences. Its objective is to enable researchers to quickly share their work with the international scientific community. The Comptes Rendus - Physique also publish journal articles, thematic issues and articles on the history of the Académie des sciences and its current scientific activity. From 2020 onwards, the journal''s policy is based on a diamond open access model: no fees are charged to authors to publish or to readers to access articles. Thus, articles are accessible immediately, free of charge and permanently after publication. The Comptes Rendus - Physique (8 issues per year) cover all fields of physics and astrophysics and propose dossiers. Thanks to this formula, readers of physics and astrophysics will find, in each issue, the presentation of a subject in particularly rapid development. The authors are chosen from among the most active researchers in the field and each file is coordinated by a guest editor, ensuring that the most recent and significant results are taken into account. In order to preserve the historical purpose of the Comptes Rendus, these issues also leave room for the usual notes and clarifications. The articles are written mainly in English.