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Advanced Materials Insights: An Electron Microscopy Approach

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (10 July 2022) | Viewed by 2070

Special Issue Editor


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Guest Editor
National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
Interests: electron microscopy; micromagnetic; crystallography; tomography; microcontrollers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electron Microscopy (EM) is regarded as a standard investigation technique in materials science. The need for exhaustive scientific information with good spatial localization (down to Angstrom scale) is transforming traditional EM into a dynamic environment accommodating techniques for morphological, chemical and structural characterizations. For example, state of the art transmission EM experiments allow material characterization at the atomic scale resolution in a controlled environment (vacuum, gas, liquid), under external excitation (heat, current, pressure). Moreover, most of the EM related techniques are able to also provide 3D information regarding the investigated material.

This Special Issue aims to provide a selection of contributions which reflect the advancements in the electron microscopy field.

The following topics are encouraged:

  • electron tomography;
  • novel methods for EM data acquisition and processing;
  • in situ EM studies (gas, liquid);
  • EM study of materials under external excitation (temperature, electrical currents);
  • sample preparation by focused ion beam;
  • rotation electron diffraction;
  • crystallographic mapping (phases, orientations);
  • strain mapping in thin films.

Dr. Andrei Cristian Kuncser
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electron tomography
  • in situ
  • sample preparation
  • rotation electron diffraction
  • crystallographic mappings

Published Papers (1 paper)

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Research

30 pages, 3492 KiB  
Article
Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM
by Larbi Boukezzi, Sébastien Rondot, Omar Jbara, Sherif S. M. Ghoneim, Ahmed Boubakeur and Saad A. Mohamed Abdelwahab
Materials 2022, 15(5), 1918; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15051918 - 04 Mar 2022
Cited by 3 | Viewed by 1706
Abstract
The effect of isothermal conditions on the trapping/detrapping process of charges in e-beam irradiated thermally aged XLPE insulation in scanning electron microscopy (SEM) has been investigated. Different isothermal conditions ranging from room temperature to 120 °C are applied on both unaged and aged [...] Read more.
The effect of isothermal conditions on the trapping/detrapping process of charges in e-beam irradiated thermally aged XLPE insulation in scanning electron microscopy (SEM) has been investigated. Different isothermal conditions ranging from room temperature to 120 °C are applied on both unaged and aged XLPE samples (2 mm thick) by a suitable arrangement associated with SEM. For each applied test temperature, leakage, and influence currents have been measured simultaneously during and after e-beam irradiation. Experimental results show a big difference between the fresh and aged material regarding trapping and detrapping behavior. It has been pointed out that in the unaged material deep traps govern the process, whereas the shallow traps take part in the aged one. Almost all obtained results reveal that the trapped charge decreases and then increases as the temperature increases for the unaged sample. A deflection temperature corresponding to a minimum is observed at 50 °C. However, for the aged material, the maximum trapped charge decreases continuously with increasing temperature, and the material seems to trap fewer charges under e-beam irradiation at high temperature. Furthermore, thermal aging leads to the occurrence of detrapping process at high temperatures even under e-beam irradiation, which explains the decrease with time evolution of trapped charge during this period. The recorded leakage current increases with increasing temperature for both cases with pronounced values for aged material. The effect of temperature and thermal aging on electrostatic influence factor (K) and total secondary electron emission yield (σ) were also studied. Full article
(This article belongs to the Special Issue Advanced Materials Insights: An Electron Microscopy Approach)
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