Metals

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Special Issue Editors

Dr. Rezgar Hasanzadeh

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Guest Editor

Department of Mechanical Engineering, Urmia University, Urmia, Iran
Interests: polymers; polymeric foams; composites and biocomposites; nanocomposites; porous materials; polymer processing; 3D printing; injection molding; extrusion; mechanical properties; insulation properties; structural properties; plastic waste; plastic waste treatment; gasification; optimization techniques
Special Issues, Collections and Topics in MDPI journals

Dr. Milad Moradian

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Guest Editor

Mechanical Engineering Department, Urmia University, Urmia, Iran
Interests: foams; porous materials; polymers; mechanical properties; dielectric properties

Special Issue Information

Dear Colleagues,

Metallic foams have a combination of properties that make them attractive in different engineering applications. These foams are now among the highly reputable technological developments in automotive, aerospace, and any other weight-related industries. Various methods are used to form metallic foams; however, the main issue in their process is the placement of air cells or any other gaseous pockets within the metal structure. Due to these gaseous regions, the weight of the foamed components is drastically lower compared to components made by traditional processing methods such as casting. The foaming technique can also provide innovative aspects to more complex methods for manufacturing parts with space inclusions. Additionally, besides low weight, these space inclusions can lead to different thermal, electrical, and mechanical properties in metallic foams.

In this Special Issue, we welcome articles on the subject of metallic foams. The focus can be on the processing stage, the morphological structure, the final properties of metallic foams, the applications of these materials, or a combination of these aspects.

Dr. Rezgar Hasanzadeh
Dr. Milad Moradian
Guest Editors

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. Metals is an international peer-reviewed open access monthly 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

foams
porous materials
metallic foams
porous metals
mechanical properties
structural properties
heat transfer
electrical properties
simulation

Published Papers (2 papers)

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Editorial

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2 pages, 147 KiB

Open AccessEditorial

Recent Developments in Research on Porous Metals and Foamed Metals

by Rezgar Hasanzadeh and Milad Moradian

Metals 2022, 12(9), 1486; https://doi.org/10.3390/met12091486 - 8 Sep 2022

Cited by 1 | Viewed by 1075

Abstract

The new open Special Issue of Metals, “Recent Developments in Research on Porous Metals and Foamed Metals”, aims to highlight original and review papers on new scientific and applied research and provide outstanding contributions to the community’s understanding of metal foams and [...] Read more.

(This article belongs to the Special Issue Recent Developments in Research on Porous Metals and Foamed Metals)

Research

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11 pages, 5798 KiB

Open AccessArticle

Porous Fabrication of White Metal Using Ultrasonically Generated Microbubbles

by Yuta Saito, Hitoshi Nozawa, Wenjing Xing and Toshinori Makuta

Metals 2023, 13(10), 1648; https://doi.org/10.3390/met13101648 - 26 Sep 2023

Viewed by 624

Abstract

Conventional methods for producing porous metals involve the use of chemicals such as thickeners and foaming agents under high temperatures and pressures. However, these methods are costly and pose a risk of dust explosion. Thus, the objective of this research is to achieve the cost-effective and safe production of porous metals by introducing microbubbles generated by ultrasonic oscillation into the molten metal. One end of an ultrasonic horn was inserted into three different molten metals—white metal, Pb-free solder, and zinc—and microbubbles were generated at the horn end by the strong ultrasonic oscillation in the molten metals. The microbubbles that contained molten metal changed phase to porous metal through solidification, and the diameter, porosity, and stress–strain curve of the generated porous metals were measured. The results indicate that the porosity of white metal, Pb-free solder, and zinc foams reached 54%, 76%, and 48%, respectively, and these porous metals had many micropores less than 1 mm in diameter. It was also observed that the higher the melting point, the larger the pore diameter and the lower the porosity. Furthermore, in the case of white metal, a plateau region of large deformation at constant stress was observed in the stress–strain curve. Full article

(This article belongs to the Special Issue Recent Developments in Research on Porous Metals and Foamed Metals)

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