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Metals
Special Issues
Recent Developments in Porous Metals and Metallic Foams
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Recent Developments in Porous Metals and Metallic Foams

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 7306

Special Issue Editor

Prof. Dr. Masanori Shiomi

E-Mail Website
Guest Editor
Department of Mechanical Science and Engineering, Kogakuin University, Tokyo, Japan
Interests: porous and cellular materials; metal foams; manufacturing; forming of porous metals; computational simulation; finite element analysis

Special Issue Information

Dear Colleagues,

The characteristic features of porous metals and metallic foams have interested scientists and industries for the past several decades. The cellular structure, with plenty of pores, causes unique properties, such as lightweight, impact energy absorption, acoustic damping, and low thermal conductivity. Many manufacturing processes have been developed since metallic foams appeared on the market in the mid-1950s. Fabrication techniques based on foaming, sintering or casting have made open or closed cell structures from solid, liquid or vapor metals. Although structural and functional applications, such as shock absorbers, filters, heat exchangers, and battery, are well known, commercial applications in the biomedical, architectural, and even artwork fields have emerged. Porous metals and metallic foams are expected to be useful materials for global issues, such as environmental preservation, energy problems, and aging societies. This Special Issue welcomes articles and reviews for the recent progress of research works on the science and technology of porous metals and metallic foams.

Prof. Dr. Masanori Shiomi
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. 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

  • Porous metal
  • Metallic foams
  • Manufacturing
  • Properties
  • Modeling and simulation
  • Nanoporous structure
  • Application

Published Papers (3 papers)

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Research

7 pages, 1675 KiB  
Communication
Fabrication of Two-Layered Aluminum Foam with Closed-Cell and Open-Cell Structures and Shaping of Closed-Cell Layer by Press Forming Immediately after Foaming
by Yoshihiko Hangai, Mizuki Ando, Masataka Ohashi and Kenji Amagai
Metals 2021, 11(1), 140; https://doi.org/10.3390/met11010140 - 12 Jan 2021
Cited by 3 | Viewed by 1736
Abstract
Two-layered aluminum foam consisting of both closed and open cells is expected to improve the functionality of aluminum foam, because the cells have different morphologies and characteristics. In this study, press forming of the closed-cell layer of the two-layered aluminum foam immediately after [...] Read more.
Two-layered aluminum foam consisting of both closed and open cells is expected to improve the functionality of aluminum foam, because the cells have different morphologies and characteristics. In this study, press forming of the closed-cell layer of the two-layered aluminum foam immediately after foaming was performed to shape the closed-cell layer. By measuring the temperatures of the two layers during foaming, we found that it is necessary to use aluminum alloy with a higher melting point for the open-cell layer than that for the closed-cell layer to foam the closed-cell layer. In the press forming experiments, the closed-cell layer could be shaped by press forming while the shape of the open-cell layer was maintained. Full article
(This article belongs to the Special Issue Recent Developments in Porous Metals and Metallic Foams)
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15 pages, 3002 KiB  
Article
Influence of the Compaction Pressure and Sintering Temperature on the Mechanical Properties of Porous Titanium for Biomedical Applications
by Sandra M. Castillo, Sergio Muñoz, Paloma Trueba, Eduardo Díaz and Yadir Torres
Metals 2019, 9(12), 1249; https://doi.org/10.3390/met9121249 - 22 Nov 2019
Cited by 12 | Viewed by 2716
Abstract
In the present work, the use of porous titanium is proposed as a solution to the difference in stiffness between the implant and bone tissue, avoiding the bone resorption. Conventional powder metallurgical technique is an industrially established route for fabrication of this type [...] Read more.
In the present work, the use of porous titanium is proposed as a solution to the difference in stiffness between the implant and bone tissue, avoiding the bone resorption. Conventional powder metallurgical technique is an industrially established route for fabrication of this type of material. The results are discussed in terms of the influence of compaction pressure and sintering temperature on the porosity (volumetric fraction, size, and morphology) and the quality of the sintering necks. A very good agreement between the predicted values obtained using a simple 2D finite element model, the experimental uniaxial compression behavior, and the analytical model proposed by Nielsen, has been found for both the Young’s modulus and the yield strength. The porous samples obtained by the loose sintering technique and using temperatures between 1000 °C −1100 °C (about 40% of total porosity) are recommended for achieving a suitable biomechanical behavior for cortical bone partial replacement. Full article
(This article belongs to the Special Issue Recent Developments in Porous Metals and Metallic Foams)
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7 pages, 2495 KiB  
Article
Shaping of Aluminum Foam during Foaming of Precursor Using Steel Mesh with Various Opening Ratios
by Yoshihiko Hangai, Ryohei Nagahiro, Masataka Ohashi, Kenji Amagai, Takao Utsunomiya and Nobuhiro Yoshikawa
Metals 2019, 9(2), 223; https://doi.org/10.3390/met9020223 - 13 Feb 2019
Cited by 7 | Viewed by 2289
Abstract
In this study, steel meshes with various opening ratios φ were used to shape aluminum foams during precursor foaming. The effect of φ on the heating rate and shape of the obtained aluminum foams was investigated. It was found that steel meshes with [...] Read more.
In this study, steel meshes with various opening ratios φ were used to shape aluminum foams during precursor foaming. The effect of φ on the heating rate and shape of the obtained aluminum foams was investigated. It was found that steel meshes with various opening ratios can be used to shape aluminum foam. There is no significant effect on the pore structures of the obtained aluminum foams when upward expansion is restricted during foaming, regardless of the value of φ. The meshes with higher φ clearly transfer the mesh pattern onto the surface of the aluminum foam but require a shorter foaming time. In contrast, the lower-φ meshes produce aluminum foams with a smoother surface but a longer foaming time is required. Full article
(This article belongs to the Special Issue Recent Developments in Porous Metals and Metallic Foams)
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