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Metals
Special Issues
Preparation, Properties and Applications of Porous Metal
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Preparation, Properties and Applications of Porous Metal

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

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 5742

Special Issue Editor

Dr. Bin Han

E-Mail Website1 Website2 Website3
Guest Editor
School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: lightweight functional materials; additive manufacturing; fiber-reinforced composites; smart metamaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the rapid development of industrial technology, the demand for lightweight, energy absorption, and multi-functionalities is increasing in many fields, such as automobile manufacturing, transportation, energy, and aerospace. Porous structural-functional materials, such as metal foams and lattice structures, have entered the field of vision due to their light weight, high specific strength, high stiffness, and large specific surface area. Graded porous metals in particular exhibit immense potential in applications for impact resistance, toxicant filtering, medical implants, etc. However, limited due to their preparation efficiency, performance, and cost controllability, porous structural materials have not been widely applied in the industry. Therefore, this issue focuses on the development and application of lightweight porous metals, with particular attention to preparation technology and properties of graded metal foams and lattices.

In this Special Issue, we invite articles on metal foams, lattices, and other newly developed lightweight porous metals with respect to preparation processes and properties. This is a fantastic opportunity for materials scientists and engineers around the world to publish their latest work on all aspects of lightweight porous metals. Lightweight metal structures/materials for new research methods on preparing processes, optimization schemes, X-ray scanning, and simulation approaches based on model reconstruction, as well as applications in aerospace and transportation, are welcome. Therefore, this Special Issue will cover (but not be limited to) the following topics:

  • Lightweight design;
  • Graded porous metals;
  • Metallic foam;
  • Lattice structure;
  • Structural application;
  • Additive manufacturing;
  • X-ray computed tomography;
  • Finite element modeling.

Dr. Bin Han
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

  • lightweight design
  • graded porous metals
  • metallic foam
  • lattice structure
  • structural application
  • additive manufacturing
  • X-ray computed tomography
  • finite element modeling

Published Papers (4 papers)

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Research

17 pages, 17229 KiB  
Article
Heat Dissipation of Open-Cell-Type Aluminum Foams Manufactured by Replication-Casting Process
by Jongmin Kim, Taekyu Ha, Youngki Lee, Byungil Kang and Youngjig Kim
Metals 2024, 14(2), 206; https://doi.org/10.3390/met14020206 - 7 Feb 2024
Viewed by 795
Abstract
Open-cell-type aluminum foam demonstrates excellent heat dissipation owing to interconnected pores. In this study, open-cell-type aluminum foams with various pore sizes and porosities were fabricated using the replication-casting process, which is a relatively simple process. The porosity of the manufactured foams ranged from [...] Read more.
Open-cell-type aluminum foam demonstrates excellent heat dissipation owing to interconnected pores. In this study, open-cell-type aluminum foams with various pore sizes and porosities were fabricated using the replication-casting process, which is a relatively simple process. The porosity of the manufactured foams ranged from approximately 55% to 62%. To assess the heat dissipation of the manufactured foams, an air-cooling system was designed. The device could pass a controlled amount of air through the connected pores, simultaneously measuring pressure drop ∆P and temperature changes. It was confirmed that the open-cell-type aluminum foams exhibited a very high cooling rate in the initial cooling phase, and the thermal behavior is influenced by structural characteristics. At a porosity of 62%, the initial maximum cooling rate was measured to be 1.41 ℃/s for a pore size of 0.7~1.0 mm, and it was observed to significantly increase to 3.82 ℃/s for a pore size of 2.8~3.4 mm. Furthermore, for the same pore size, an increase in porosity resulted in an increase in the initial cooling rate. Lager pore sizes and higher porosities led to lower pressure drop ∆P and improved airflow, enhancing the cooling efficiency of open-cell-type aluminum foams. Full article
(This article belongs to the Special Issue Preparation, Properties and Applications of Porous Metal)
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15 pages, 6456 KiB  
Article
Phase Field Simulations of Microstructures in Porous Ferromagnetic Shape Memory Alloy Ni2MnGa
by Cailian Xu, Yu Huang, Yongfeng Liang and Pingping Wu
Metals 2023, 13(9), 1572; https://doi.org/10.3390/met13091572 - 8 Sep 2023
Viewed by 883
Abstract
The magnetic domain structures and martensite microstructures of porous Ni2MnGa Heusler alloys with various circle-shaped and ellipse-shaped pores were systematically studied by the phase field method. The magnetization curves and magnetic field-induced strains (MFIS) at the external field were determined. A [...] Read more.
The magnetic domain structures and martensite microstructures of porous Ni2MnGa Heusler alloys with various circle-shaped and ellipse-shaped pores were systematically studied by the phase field method. The magnetization curves and magnetic field-induced strains (MFIS) at the external field were determined. A mesoscopic mechanism was proposed for simulation to reveal the influence of the pores on the microstructures and the MFIS of porous magnetic shape memory alloy. The stress concentration effect and the recovery strain of the porous alloy are studied. The results indicate the MFIS value increases when ellipse-shaped pores elongate along the twin boundary. The effects of porosity and pore size on MFIS for porous Ni-Mn-Ga alloys with randomly distributed pores were also explored. The present study is of guiding significance for understanding the role played by pores on the MFIS and may provide a possible way to adjust the functional properties of ferromagnetic shape memory alloys. Full article
(This article belongs to the Special Issue Preparation, Properties and Applications of Porous Metal)
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12 pages, 4916 KiB  
Article
Multifunctional Open-Cell Copper Foam with Sphere Pores by a Modified Sintering–Dissolution Process
by Changxing Li, Yao Wang, Zhipeng Liu, Peiyuan Zheng, Qi Zhang and Bin Han
Metals 2023, 13(4), 791; https://doi.org/10.3390/met13040791 - 17 Apr 2023
Cited by 4 | Viewed by 1174
Abstract
In this study, open-cell copper foam with completely interconnected sphere pores was prepared by a modified sintering–dissolution process using a preformed calcium chloride template skeleton as space holder. Compared with the traditional foaming process method, the open-cell copper foam prepared by this method [...] Read more.
In this study, open-cell copper foam with completely interconnected sphere pores was prepared by a modified sintering–dissolution process using a preformed calcium chloride template skeleton as space holder. Compared with the traditional foaming process method, the open-cell copper foam prepared by this method has fewer impurities and better surface morphology. In addition, the pore distribution can be controlled by adjusting the distribution of calcium chloride particles in the skeleton. The compression performance, airflow resistance, and filtration performance of the prepared open-cell copper foam were studied. The results show that with the increase in porosity, the bearing capacity of open-cell copper foam decreases, but the width of the stress platform increases. The prepared open-cell copper foam exhibits excellent energy absorption efficiency, reaching nearly 90% at a porosity of 85%. When the porosity is 85%, the static airflow resistance of the structure is as high as 9 KPa·s·m−2. Moreover, the structure has a filtration efficiency of more than 90% as the filtration thickness exceeds 20 mm, which demonstrates the excellent filtration ability. Such open-cell copper foam shows multi-functional potential as an impact damper, sound absorber, and impurity filter. Full article
(This article belongs to the Special Issue Preparation, Properties and Applications of Porous Metal)
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13 pages, 9500 KiB  
Article
Dependence of Particle Size and Geometry of Copper Powder on the Porosity and Capillary Performance of Sintered Porous Copper Wicks for Heat Pipes
by Trinh Minh Hoan, Nguyen Van Toan, Nguyen Phu Hung, Pham Van Trinh, Tran Bao Trung and Doan Dinh Phuong
Metals 2022, 12(10), 1716; https://doi.org/10.3390/met12101716 - 13 Oct 2022
Cited by 2 | Viewed by 2125
Abstract
Permeability and capillary performance are the most important parameters relating to the thermal performance of heat pipes. These parameters are deeply linked to pore structure, which has been influenced by the starting powder utilized. In this paper, the effect of particle size and [...] Read more.
Permeability and capillary performance are the most important parameters relating to the thermal performance of heat pipes. These parameters are deeply linked to pore structure, which has been influenced by the starting powder utilized. In this paper, the effect of particle size and geometry of copper powder on the porosity and capillary performance of porous wicks were systematically studied. Sintered porous wicks were made from different-sized spherical (58 μm, 89 μm, 125 μm) and dendritic (59 μm, 86 μm, 130 μm) Cu powders. The results demonstrated that the porosity and capillary performance of both types of copper powder increase with particle size due to an increase in the connectivity between internal pores. In comparison to the spherical powder, the dendritic powder demonstrated superior capillary efficiency as well as greater porosity. Additionally, a model was proposed for the capillary performance and permeability of sintered porous copper. The predicted results were quite comparable to the experimental data, demonstrating the effect of the starting powder. These findings suggest that porosity and capillary performance of porous wicks are strongly related to powder geometry as well as particle size. Full article
(This article belongs to the Special Issue Preparation, Properties and Applications of Porous Metal)
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