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Stage-Rocked Electron Channeling for Crystal Orientation Mapping

Microstructural analysis by crystal orientation mapping of bulk functional materials is an essential and routine operation in the engineering of material properties. Far and away the most successfully employed technique, Electron Backscattered Diffraction (EBSD), provides high spatial resolution inf...

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Autores principales: Hujsak, Karl A., Myers, Benjamin D., Grovogui, Jann, Dravid, Vinayak P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5980099/
https://www.ncbi.nlm.nih.gov/pubmed/29581581
http://dx.doi.org/10.1038/s41598-018-23413-3
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author Hujsak, Karl A.
Myers, Benjamin D.
Grovogui, Jann
Dravid, Vinayak P.
author_facet Hujsak, Karl A.
Myers, Benjamin D.
Grovogui, Jann
Dravid, Vinayak P.
author_sort Hujsak, Karl A.
collection PubMed
description Microstructural analysis by crystal orientation mapping of bulk functional materials is an essential and routine operation in the engineering of material properties. Far and away the most successfully employed technique, Electron Backscattered Diffraction (EBSD), provides high spatial resolution information at the cost of limited angular resolution and a distorted imaging condition. In this work, we demonstrate a stage-rocked electron channeling approach as a low-cost orientation mapping alternative to EBSD. This is accomplished by automated electron channeling contrast imaging (ECCI) as the microscope stage physically tilts/rotates a sample through a reduced hemisphere of orientations followed by computational reconstruction of electron channeling patterns (ECP). Referred to as Orientation Mapping by Electron Channeling (OMEC), our method offers advantages in terms of local defect analysis, as it combines the advantages of selected area ECP (SACP) and ECCI. We also illustrate dynamic or “adaptive” sampling schemes to increase the throughput of the technique. Finally, we discuss the implications for sample analysis in which large 3D maps of ECCI images can be routinely constructed of challenging crystalline samples. As an electron channeling-based approach to orientation mapping, OMEC may open new routes to characterize crystalline materials with high angular and spatial resolution.
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spelling pubmed-59800992018-06-06 Stage-Rocked Electron Channeling for Crystal Orientation Mapping Hujsak, Karl A. Myers, Benjamin D. Grovogui, Jann Dravid, Vinayak P. Sci Rep Article Microstructural analysis by crystal orientation mapping of bulk functional materials is an essential and routine operation in the engineering of material properties. Far and away the most successfully employed technique, Electron Backscattered Diffraction (EBSD), provides high spatial resolution information at the cost of limited angular resolution and a distorted imaging condition. In this work, we demonstrate a stage-rocked electron channeling approach as a low-cost orientation mapping alternative to EBSD. This is accomplished by automated electron channeling contrast imaging (ECCI) as the microscope stage physically tilts/rotates a sample through a reduced hemisphere of orientations followed by computational reconstruction of electron channeling patterns (ECP). Referred to as Orientation Mapping by Electron Channeling (OMEC), our method offers advantages in terms of local defect analysis, as it combines the advantages of selected area ECP (SACP) and ECCI. We also illustrate dynamic or “adaptive” sampling schemes to increase the throughput of the technique. Finally, we discuss the implications for sample analysis in which large 3D maps of ECCI images can be routinely constructed of challenging crystalline samples. As an electron channeling-based approach to orientation mapping, OMEC may open new routes to characterize crystalline materials with high angular and spatial resolution. Nature Publishing Group UK 2018-03-26 /pmc/articles/PMC5980099/ /pubmed/29581581 http://dx.doi.org/10.1038/s41598-018-23413-3 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Hujsak, Karl A.
Myers, Benjamin D.
Grovogui, Jann
Dravid, Vinayak P.
Stage-Rocked Electron Channeling for Crystal Orientation Mapping
title Stage-Rocked Electron Channeling for Crystal Orientation Mapping
title_full Stage-Rocked Electron Channeling for Crystal Orientation Mapping
title_fullStr Stage-Rocked Electron Channeling for Crystal Orientation Mapping
title_full_unstemmed Stage-Rocked Electron Channeling for Crystal Orientation Mapping
title_short Stage-Rocked Electron Channeling for Crystal Orientation Mapping
title_sort stage-rocked electron channeling for crystal orientation mapping
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5980099/
https://www.ncbi.nlm.nih.gov/pubmed/29581581
http://dx.doi.org/10.1038/s41598-018-23413-3
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