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Modern Materials with Amorphous and Nanocrystalline Structure

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

Deadline for manuscript submissions: closed (20 September 2022) | Viewed by 1514

Special Issue Editor

Department of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, 42-200 Czestochowa, Poland
Interests: methods of producing amorphous materials; bulk metallic glasses; amorphous materials; soft magnetic materials; nanomaterials; X-ray diffraction; Mössbauer spectroscopy; spectrophotometry; synthesis of carbon quantum dots, polymers, and composites
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Special Issue Information

Dear Colleagues,

In recent years, various industries have been looking for new materials, the use of which would significantly affect indicators such as the production costs, competitiveness, labor productivity, operation, ecology, and innovation. One of the very interesting, relatively new groups of materials are materials with an amorphous and nanocrystaline structure. The first of these are single-phase materials and are characterized by the presence of short-range interactions between atoms and the lack of periodicity in their spatial arrangement. The latter are two-phase materials consisting of an amorphous and a crystalline part. The mixture of these two phases may be the cause of a significant improvement in the functional properties of the tested alloy in relation to the properties of an amorphous or crystalline alloy of the same chemical composition.

Materials with an amorphous and nanocrystaline structure are one of the newer groups of modern materials with significantly better properties than the corresponding crystalline materials of the same composition. Particularly interesting, for functional reasons, are amorphous ferromagnetic alloys showing the so-called soft magnetic properties. These materials, compared to the commercially used FeSi transformer sheets, show significantly lower losses during re-magnetization, reducing this undesirable effect by as much as 80%. Therefore, in-depth knowledge of the methodology of their production and a detailed analysis of the magnetic properties with the simultaneous study of their structure may contribute to significant technological progress.

Another group of modern materials are geopolymers. The term includes modern inorganic, amorphous, synthetic polymers aluminum silicates with a specific composition and unique properties.

This Special Issue covers all aspects of the synthesis, characterization, and application of modern amorphous and nanocrystaline materials. I am inviting you to publish the results of your research related to the subject of this Issue.

Dr. Paweł Pietrusiewicz
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

  • amorphosu and nanocrystalline materials
  • soft magnetic materials
  • polymers geopolimers
  • rapid solidification
  • injection and suction method casting
  • melt spinning method
  • structural relaxation

Published Papers (1 paper)

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Research

10 pages, 6004 KiB  
Article
Influence of the Electron Beam and the Choice of Heating Membrane on the Evolution of Si Nanowires’ Morphology in In Situ TEM
by Ya Shen, Xuechun Zhao, Ruiling Gong, Eric Ngo, Jean-Luc Maurice, Pere Roca i Cabarrocas and Wanghua Chen
Materials 2022, 15(15), 5244; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15155244 - 29 Jul 2022
Cited by 1 | Viewed by 1088
Abstract
We used in situ transmission electron microscopy (TEM) to observe the dynamic changes of Si nanowires under electron beam irradiation. We found evidence of structural evolutions under TEM observation due to a combination of electron beam and thermal effects. Two types of heating [...] Read more.
We used in situ transmission electron microscopy (TEM) to observe the dynamic changes of Si nanowires under electron beam irradiation. We found evidence of structural evolutions under TEM observation due to a combination of electron beam and thermal effects. Two types of heating holders were used: a carbon membrane, and a silicon nitride membrane. Different evolution of Si nanowires on these membranes was observed. Regarding the heating of Si nanowires on a C membrane at 800 °C and above, a serious degradation dependent on the diameter of the Si nanowire was observed under the electron beam, with the formation of Si carbide. When the membrane was changed to Si nitride, a reversible sectioning and welding of the Si nanowire was observed. Full article
(This article belongs to the Special Issue Modern Materials with Amorphous and Nanocrystalline Structure)
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