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Applied Sciences
Special Issues
Mechanical and Electrical Properties of Composite Materials
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Mechanical and Electrical Properties of Composite Materials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 20 September 2024 | Viewed by 830

Special Issue Editor

Dr. Monika Gwoździk

E-Mail Website
Guest Editor
Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Armii Krajowej 19 Av., 42-201 Czestochowa, Poland
Interests: biomaterials; surface engineering; power engineering; composites; metals

Special Issue Information

Dear Colleagues,

The world is constantly striving to create new design solutions with increasingly better use of engineering materials, especially composite materials. Composite materials are manufactured primarily to provide better properties compared to individual components. These materials are produced, among other reasons, to ensure appropriate mechanical and electrical properties. The properties of composite materials can be designed to achieve various types of purposes. Most often, the appropriate selection of reinforcement is used to shape the properties. It also seems important to take into account the geometric features (orientation) of the reinforcing phase. The topics that will be covered in this Special Issue will focus mainly on testing methods, manufacturing technologies, and testing of the properties (electrical and mechanical) of composite materials.

This Special Issue will publish original research articles focusing on the mechanical and electrical properties of composite materials. The Special Issue will cover the following aspects:

  • Composite materials;
  • Fibers reinforcing composite materials;
  • Manufacture of composites;
  • Nanocomposites;
  • Modeling of composites;
  • Processing, manufacturing, and properties of composites.

Dr. Monika Gwoździk
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. Applied Sciences 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 2400 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

  • composites
  • reinforcing phases
  • mechanical and electrical properties

Published Papers (2 papers)

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Research

18 pages, 17506 KiB  
Article
The Use of Ashes in Surface Metal Matrix Composites Produced by Friction Stir Processing
by Józef Iwaszko, Krzysztof Kudła and Marcin Sajdak
Appl. Sci. 2024, 14(9), 3544; https://doi.org/10.3390/app14093544 - 23 Apr 2024
Viewed by 234
Abstract
The article presents an assessment of the possibility of using ashes from the combustion of coal and biomass as a reinforcing phase in metal matrix composites. The composite surface layer was produced by means of the FSP (friction stir processing) method, using an [...] Read more.
The article presents an assessment of the possibility of using ashes from the combustion of coal and biomass as a reinforcing phase in metal matrix composites. The composite surface layer was produced by means of the FSP (friction stir processing) method, using an original hole solution with a shifted working zone of the pin. The composite matrix was AA7075 alloy. The obtained composite was subjected to microscopic observations, tribological tests, and hardness measurements. The microscopic examinations revealed favorable changes in the microstructure, in particular, strong refinement of the grains, uniform distribution of the reinforcing phase, and good bonding of the particles of this phase with the matrix material. Changes in the microstructure resulted in a significant increase in the hardness (from 36 to 41% depending on the type of reinforcing phase) and wear resistance (from 24.1 to 32.9%), despite partial dissolution of the intermetallic phases. It was found that the effect of strengthening the matrix and the uniformity of the distribution of the reinforcing phase depend on the physicochemical properties of the used powders, especially on the shape and size of the particles. The research shows that the use of ashes as a reinforcing phase in composites is fully justified. Full article
(This article belongs to the Special Issue Mechanical and Electrical Properties of Composite Materials)
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15 pages, 7962 KiB  
Article
Silver Alloy Surface Modification for Mechanical Property Enhancement in Aviation and Transportation
by Krzysztof Labisz and Jarosław Konieczny
Appl. Sci. 2024, 14(5), 1702; https://doi.org/10.3390/app14051702 - 20 Feb 2024
Viewed by 388
Abstract
Silver alloys are often used for electrical switches in railway transportation. However, a well-known issue with these switches is their relatively short application period due to certain disadvantages of silver alloys, mainly their low hardness and low resistance to abrasive wear, in contrast [...] Read more.
Silver alloys are often used for electrical switches in railway transportation. However, a well-known issue with these switches is their relatively short application period due to certain disadvantages of silver alloys, mainly their low hardness and low resistance to abrasive wear, in contrast to their excellent electrical conductivity. Therefore, the main goal of this study was to increase or maintain the hardness of the surface layer in order to extend the life of worn parts without compromising their electrical properties. Instead of ceramic particles, as in other studies, metallic powders were used, which could increase the electrical and/or thermal properties of silver alloys. The following work presents the use of laser processing as a relatively new technique for metal and metal alloy surface processing technology. In particular, a process based on the melting of silver (Ag) with metallic powders, such as chromium (Cr) and nickel (Ni) particles, is presented. The aim was for these powders to create intermetallic phases with a silver matrix in the obtained surface layer, significantly improving the mechanical properties based on the formation of the phases coherent or semi-coherent with the silver matrix. Regarding the original practical implications of this work, it was important to investigate the possibility of applying fibre laser for surface property enhancement. The scientific aim was to describe the changes in microstructure and compounds that occurred in the laser-remelted surface silver layer after Ni and Cr particles were fed into the basic silver material. It was concluded that the surface layer obtained after chromium application was without cracks and defects and had a higher hardness than the untreated material. A three-zone structure was also found in the obtained surface layer: (1) the remelted zone, (2) the heat-affected zone, and (3) the matrix material. The remelting zone revealed a higher hardness compared to the untreated material, reaching 92 HV0.3, which is more than twice the initial hardness value. Full article
(This article belongs to the Special Issue Mechanical and Electrical Properties of Composite Materials)
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