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Metals
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Porous Metallic Materials: Properties, Applications and Latest Research Progress
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Porous Metallic Materials: Properties, Applications and Latest Research Progress

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metallic Functional Materials".

Deadline for manuscript submissions: 30 September 2025 | Viewed by 518

Special Issue Editor

Prof. Dr. Qingzhou Wang

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China
Interests: porous metal materials; high damping alloys; metal matrix composites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Porous metallic materials, with their elaborate porous networks, possess outstanding structural characteristics and excellent properties. Their porous structures, varying from foam-like to honeycomb forms, combine lightweight, high stiffness, high damping, and remarkable energy absorption abilities. These materials are widely used in military and industrial fields. In military applications, they are perfect for armor and impact-resistant parts due to their excellent shock absorption. In excel in industrial applications such as heat transfer, noise reduction, and catalysis. Moreover, in aerospace, they are used for manufacturing lightweight yet strong structural components like aircraft wings and for thermal protection systems. In electronic and electrical areas, they serve as electromagnetic shields for electronic devices and as electrode materials or heat dissipation components.

This Special Issue focuses on the latest research progress of porous metal materials. It covers aspects such as new process and equipment R&D, novel material preparation, the structure–property relationship, application research, and the multifunctional integration study of these materials.

Prof. Dr. Qingzhou Wang
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 metallic materials
  • preparation
  • structure–property relationship
  • application research
  • multifunctional integration

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Published Papers (2 papers)

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Research

11 pages, 4262 KiB  
Article
Formation of Lotus-Type Porous Iron by Zone Melting in a Nitrogen Atmosphere
by Yingjie Pan, Yuchong Chen and Qinglin Jin
Metals 2025, 15(4), 364; https://doi.org/10.3390/met15040364 - 26 Mar 2025
Viewed by 145
Abstract
Traditional lotus-type porous materials are typically fabricated under a hydrogen atmosphere, which poses safety risks. In contrast, using nitrogen enhances safety but often results in lower porosity and irregular pore shapes. This study investigates the fabrication of lotus-type porous iron using the zone [...] Read more.
Traditional lotus-type porous materials are typically fabricated under a hydrogen atmosphere, which poses safety risks. In contrast, using nitrogen enhances safety but often results in lower porosity and irregular pore shapes. This study investigates the fabrication of lotus-type porous iron using the zone melting technique under a nitrogen atmosphere, exploring the effects of nitrogen pressure and withdrawal rate on pore morphology. The results show that higher nitrogen pressure and a lower withdrawal rate lead to more regular and uniform pores. At 1.0 MPa nitrogen pressure and a 5 mm/min withdrawal rate, the most regular pore morphology was achieved, with porosity reaching 35%. Furthermore, as the nitrogen pressure increases, the nitrogen content and micro-Vickers hardness of the material increase significantly, exhibiting a pronounced solid solution strengthening effect. At 1.0 MPa, the nitrogen content reaches 0.077 wt.%, and the hardness increases from 136 HV for pure iron to 192 HV. Theoretical analysis suggests that stable pore growth is achieved when the product of nitrogen pressure and withdrawal rate is less than a constant. Increasing the nitrogen pressure promotes nitrogen dissolution in the molten zone, while a lower withdrawal rate facilitates adequate nitrogen diffusion, ensuring stable pore growth and higher porosity. This study provides a foundation for fabricating lotus-type porous materials using nitrogen as a safer alternative to hydrogen. Full article
(This article belongs to the Special Issue Porous Metallic Materials: Properties, Applications and Latest Research Progress)
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17 pages, 31445 KiB  
Article
Damping and Compressive Properties of SLM-Fabricated Rhombic Dodecahedron-Structured Ni–Ti Shape Memory Alloy Foams
by Di Guo, Qingzhou Wang, Li Liu, Shuo Liu, Hao Cao, Jingxia Xie and Fuxing Yin
Metals 2025, 15(3), 335; https://doi.org/10.3390/met15030335 - 19 Mar 2025
Viewed by 173
Abstract
Ni–Ti shape memory alloy (SMA) foams, capable of bringing revolutionary changes to crucial fields such as aerospace, energy engineering, and biomedical applications, are at the forefront of materials science research. With the aim of designing Ni–Ti SMA foams with complex structures, near-equiatomic Ni–Ti [...] Read more.
Ni–Ti shape memory alloy (SMA) foams, capable of bringing revolutionary changes to crucial fields such as aerospace, energy engineering, and biomedical applications, are at the forefront of materials science research. With the aim of designing Ni–Ti SMA foams with complex structures, near-equiatomic Ni–Ti SMA foams featuring a rhombic dodecahedron (RD) structure were fabricated using selective laser melting (SLM) technology. Damping, superelasticity, and quasi-static compressive mechanical tests were carried out on the resultant foams. The findings indicated that the smaller the unit structure of the RD or the larger the rod diameter, the higher the damping and compressive strength of the foams would be. Foams with a cell structure of 2 mm × 2 mm × 2 mm and a rod diameter of 0.6 mm exhibited the highest damping, reaching up to 0.049, along with the highest compressive strength, reaching up to 145 MPa. Furthermore, if the specimen underwent solution and aging heat treatments, its strength could be further enhanced. Meanwhile, the specimens also exhibited excellent superelasticity; even when the pre-strain was 6%, the elastic recovery could still reach 97%. Based on microstructure characterization and finite element simulation, the property mechanisms and deformation rules of the foams were revealed. Full article
(This article belongs to the Special Issue Porous Metallic Materials: Properties, Applications and Latest Research Progress)
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