Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
4.5
2.7
Journals
Applied Sciences
Special Issues
Porous Materials and Structures
share announcement

Porous Materials and Structures

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

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 7853

Special Issue Editors

Dr. Weibin Wen

E-Mail Website
Guest Editor
Associate Professor, Civil Engineering College, Central South University, Changsha 410017, China
Interests: porous materials; metamaterials
Prof. Dr. Xin Ren

E-Mail Website
Guest Editor
College of Civil Engineering, Nanjing Tech University, Nanjing 211800, China
Interests: structural engineering; metamaterials; composites; auxetics; topology optimization
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-absorbing, 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.

This Special Issue aims to provide a platform for researchers around the world to focus on porous materials and structures. We warmly welcome original research papers demonstrating the most recent advances as well as comprehensive reviews addressing state-of-the-art aspects in the field of porous materials and structures. Topics of interest include, but are not limited to, the following themes:

  1. Innovative porous materials (inorganic, organic, and hybrids).
  2. Fabrication, characterization, functionalization, and use of porous materials in different applications.
  3. Advanced manufacturing approaches and processing, including additive manufacturing techniques of porous materials.
  4. Novel characterization methods and approaches, such as 3D imaging and reconstruction.
  5. Simulation/optimization properties of porous materials.
  6. Metamaterials and applications.

It is our pleasure to invite you to submit a manuscript for this Special Issue. Full papers, short communications, and reviews are all welcome.

Dr. Weibin Wen
Dr. Xin Ren
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. 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.

Published Papers (7 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

12 pages, 4380 KiB  
Article
Catalytic Evaluation of Hafnium Modified SiO2 for the Dehydration of Alcohols
by Heriberto Esteban Benito, Ricardo García Alamilla, Luz Arcelia García Serrano, Francisco Paraguay Delgado and Juan Antonio Carmona García
Appl. Sci. 2023, 13(14), 8541; https://doi.org/10.3390/app13148541 - 24 Jul 2023
Viewed by 732
Abstract
The influence of hafnium metal (Hf) and sulfate ions (SO42−) on the acidic properties of SiO2 mesopores synthesized by a non-hydrothermal method was studied using the following characterization techniques; TG-DTG, XRD, BET, SEM, TEM, EDS, FTIR, [...] Read more.
The influence of hafnium metal (Hf) and sulfate ions (SO42−) on the acidic properties of SiO2 mesopores synthesized by a non-hydrothermal method was studied using the following characterization techniques; TG-DTG, XRD, BET, SEM, TEM, EDS, FTIR, n-butylamine titration, FTIR-pyridine, and alcohol dehydration. The incorporation of 3.6% mol of Hf during the silicate synthesis step caused the characteristic structural arrangement of MCM-41 to collapse. However, an increase in the acid strength of the catalyst of up to 315 mV was observed, with Brönsted and Lewis-type acid sites being mostly present therein. Furthermore, the acidity of Hf- and (SO42−) -modified SiO2 in the dehydration of ethanol and methanol was evaluated, resulting in a selectivity towards ethylene and dimethyl ether, respectively. Acid solids have enormous potential to produce important compounds for the chemical industry using alternative routes other than petrochemical processes. They also represent a significant advance for biorefineries. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

14 pages, 2638 KiB  
Article
Experimental Investigations on the Mechanical Performances of Auxetic Metal-Ceramic Hybrid Lattice under Quasi-Static Compression and Dynamic Ballistic Loading
by Rong Wang, Yongxiong Chen, Xiaonan Yan, Nan Cong, Delei Fang, Peipei Zhang, Xiubing Liang and Wenwang Wu
Appl. Sci. 2023, 13(13), 7564; https://doi.org/10.3390/app13137564 - 27 Jun 2023
Cited by 2 | Viewed by 1026
Abstract
In recent years, there have been increasing research interests in investigating the compression and ballistic responses of metal-ceramic hybrid structures, mainly making use of the synergistic effects of conventional metal honeycomb structures and infilled ceramic matrix materials. In this paper, a novel hybrid [...] Read more.
In recent years, there have been increasing research interests in investigating the compression and ballistic responses of metal-ceramic hybrid structures, mainly making use of the synergistic effects of conventional metal honeycomb structures and infilled ceramic matrix materials. In this paper, a novel hybrid auxetic re-entrant metal-ceramic lattice is designed and manufactured to overcome the intrinsic conflicts between the strength and toughness of architected mechanical metamaterials, synergistic effects of auxetic re-entrant metal honeycombs and infilled ceramic materials are experimentally and numerically studied, and auxetic deformation features and failure modes are characterized with the digital image correlation (DIC) technique as well. It was found that (1) the infilled ceramic matrix of conventional honeycomb frames only endure longitudinal compression or impact loading along the external loading direction, while auxetic metal re-entrant honeycomb components endure both longitudinal and transverse loading due to the negative Poisson′s ratio effect and (2) the collaborative effects of infilled auxetics and the constraint frames’ hybrid structure dramatically moderate the stress concentration state and improve the impact resistance of single-phase ceramic materials. Our results indicate that the auxetic hybrid design exhibits promising industrial application potentials for blast protection engineering. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

13 pages, 3284 KiB  
Article
Research Progress on Mechanical Behavior of Closed-Cell Al Foams Influenced by Different TiH2 and SiC Additions and Correlation Porosity-Mechanical Properties
by Manoharan Bhuvanesh, Girolamo Costanza and Maria Elisa Tata
Appl. Sci. 2023, 13(11), 6755; https://doi.org/10.3390/app13116755 - 01 Jun 2023
Viewed by 994
Abstract
Closed-cell aluminium foams with different compositions have been manufactured starting from powders and also characterized from a morphological point of view and by means of compressive tests in order to determine mechanical properties. Circularity, equivalent diameter, and average porosity area of such foams [...] Read more.
Closed-cell aluminium foams with different compositions have been manufactured starting from powders and also characterized from a morphological point of view and by means of compressive tests in order to determine mechanical properties. Circularity, equivalent diameter, and average porosity area of such foams have been calculated from the analysis of cross-sections as well specific energy absorption in compression tests. Samples with a higher amount of blowing agent (TiH2) have the highest energy absorption while samples with a higher amount of stabilizing agent (SiC) exhibit good foam properties overall (best compromise between morphology and energy absorption). The analysis of morphological properties, such as area, circularity, and equivalent diameter, can provide a better understanding of the foam’s structure and porosity––parameters which can be manipulated to enhance the foam’s properties for specific applications, both structural and functional. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

15 pages, 3385 KiB  
Article
Study of a Layered Plate Girder Element of Composite Materials and Its Applications
by Yanqun Han, Li Chen and Wenqi Hou
Appl. Sci. 2023, 13(11), 6545; https://doi.org/10.3390/app13116545 - 27 May 2023
Viewed by 825
Abstract
This study aims to provide an effective method to study the behavior of a steel–concrete composite deck. First, the structural characteristics of the composite deck and the challenges arising in the computational analysis of the structure using general software are described. Then, an [...] Read more.
This study aims to provide an effective method to study the behavior of a steel–concrete composite deck. First, the structural characteristics of the composite deck and the challenges arising in the computational analysis of the structure using general software are described. Then, an LPGE element that combines the plate element and the girder element into one element to conveniently construct the model with high computation efficiency is proposed. Based on the principle of multivariate field function, the constraint matrix for the plate and girder and the stiffness matrix for the LPGE are derived. The LPGE method is used to study the behavior of the composite deck through the computation of a steel truss arch bridge. The computation results are compared with the results obtained in ANSYS and the test results to verify the correctness and effectiveness of the LPGE method. The results of the paper offer references for the analysis of steel–concrete composite decks. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

13 pages, 8014 KiB  
Article
Synthesis and Properties of Octet NiCr Alloy Lattices Obtained by the Pack Cementation Process
by Peng Zhao, Deqing Huang, Hongmei Zhang, Weiwei Chen and Yongfu Zhang
Appl. Sci. 2023, 13(3), 1684; https://doi.org/10.3390/app13031684 - 28 Jan 2023
Viewed by 1004
Abstract
NiCr alloys with different components were obtained by pack chromation and homogenization heat treatment of octet Ni lattice. The microstructure, alloy composition, microhardness and quasi-static compression properties of the NiCr lattice were tested. The results showed that after homogenization heat treatment, the NiCr [...] Read more.
NiCr alloys with different components were obtained by pack chromation and homogenization heat treatment of octet Ni lattice. The microstructure, alloy composition, microhardness and quasi-static compression properties of the NiCr lattice were tested. The results showed that after homogenization heat treatment, the NiCr alloy lattice had an austenitic structure with uniform composition. Compared with the pure nickel lattice, the microhardness, compressive strength, elastic modulus and energy absorption of the NiCr lattice increased with the increase of chromium content. The microhardness, specific strength, specific modulus and specific energy absorption of the Ni-45Cr alloy were 363 HV, 11.1 MP/(g/cm3), 1169.1 MP/(g/cm3) and 10 J/g, respectively, which were attributed to the solid solution strengthening provided by chromium and the increase in density. NiCr alloy lattices have high strength and toughness and may have potential applications in high-temperature filters or heat exchangers. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

18 pages, 3262 KiB  
Article
Effect of Randomness of Parameters on Amplification of Ground Motion in Saturated Sedimentary Valley
by Ying He, Xu Liu, Zhongxian Liu, Xueling Chen and Benchi Yin
Appl. Sci. 2023, 13(2), 1147; https://doi.org/10.3390/app13021147 - 14 Jan 2023
Viewed by 932
Abstract
Based on Biot’s theory and the indirect boundary element method (IBEM), the Monte Carlo method is utilized to generate random samples to calculate the displacement response of a saturated sedimentary valley under SV wave incidence. The purpose of this paper is to explore [...] Read more.
Based on Biot’s theory and the indirect boundary element method (IBEM), the Monte Carlo method is utilized to generate random samples to calculate the displacement response of a saturated sedimentary valley under SV wave incidence. The purpose of this paper is to explore the effects of randomness of porosity, permeability coefficient, and geometric shape on the seismic amplification effect of saturated complex sites. It is shown that the change of media porosity in the saturated site with defined boundary has relatively little influence on the ground motion, and the influence of the permeability coefficient is slightly larger. While in the site with a random boundary, the influence of both the porosity and permeability coefficient are significant, which cannot be ignored. The conclusion plays an important guiding role in earthquake disaster prevention and mitigation, such as seismic risk analysis and earthquake microzonation in saturated sedimentary valleys. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

18 pages, 19543 KiB  
Article
Space Node Topology Optimization Design Considering Anisotropy of Additive Manufacturing
by Xianjie Wang, Fan Zhang, Zhenjiang Weng, Xinyu Jiang, Rushuang Wang, Hao Ren and Feiyun Zheng
Appl. Sci. 2022, 12(18), 9396; https://doi.org/10.3390/app12189396 - 19 Sep 2022
Cited by 2 | Viewed by 1609
Abstract
At present, a large number of scholars have conducted related research on topology optimization for additive manufacturing (AM). However, there are few relevant research reports on the impact of different directions of additive manufacturing on the optimal design and manufacturing results. In this [...] Read more.
At present, a large number of scholars have conducted related research on topology optimization for additive manufacturing (AM). However, there are few relevant research reports on the impact of different directions of additive manufacturing on the optimal design and manufacturing results. In this paper, using the bidirectional evolutionary optimization (BESO) method, anisotropic optimization analysis was carried out on space nodes that are currently popular in the field of additive manufacturing and topology optimization. The elastic constants in different directions were used as anisotropic material properties for optimization research in this paper through tensile testing, which was carried out on 316L stainless-steel specimens fabricated using Selective Laser Melting (SLM) technology. In addition, SEM analyses were performed to explore the microscopic appearance of the material. The study found that additive manufacturing is affected by the printing direction in terms of both macroscopic mechanical properties and microscopic material structure; the deformation obtained by anisotropic optimization was about 1.1–2.3% smaller than that obtained by isotropic optimization. Full article
(This article belongs to the Special Issue Porous Materials and Structures)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-7
Back to TopTop