Materials最新文献_第10页

Experimental Study on Mechanical Properties of Thermally Conductive High-Strength Concrete.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-31 DOI: 10.3390/ma18030642

Xiaojun Li, Shenglei Jia, Longgang Chen, Rongjian Shen, Yang Liu, Ruifeng Mou

{"title":"Experimental Study on Mechanical Properties of Thermally Conductive High-Strength Concrete.","authors":"Xiaojun Li, Shenglei Jia, Longgang Chen, Rongjian Shen, Yang Liu, Ruifeng Mou","doi":"10.3390/ma18030642","DOIUrl":"10.3390/ma18030642","url":null,"abstract":"Ultra-high-performance concrete (UHPC) is considered one of the future building materials due to its excellent performance. UHPC with good thermal conductivity has potential high-value applications in large-scale bridges and nuclear facilities. As a by-product of the coal gasification process, coal gasification slag (CGS) can replace sand in traditional UHPC. In this paper, based on the preparation of UHPC by CGS, silicon carbide (SiC) was added to improve the thermal conductivity of specimens. The application of CGS and SiC as alternatives to quartz sand with varying mix ratios in UHPC was studied. The impact of the substitution ratios of CGS and SiC on fluidity, mechanical properties, and thermal performance was analyzed. The compressive strength and splitting tensile strength of five different kinds of specimens were tested at 7 d, 14 d, and 28 d. The compressive strength and mass loss rate of specimens with five different ratios were also determined under five different temperature conditions (110 °C, 200 °C, 300 °C, 400 °C, and 500 °C). The results show that the maximum compressive strength of 28 d can reach 159.5 MPa and the splitting strength is 15.30 MPa. The addition of SiC can improve the thermal conductivity and thermal stability of concrete. The compressive strength of all specimens is improved after high-temperature treatment. When substitution rate of SiC reaches 100%, the compressive strength of the specimens is up to 182.2 MPa. With the increase in temperature, the concrete burst phenomenon occurs above 300 °C. It is observed that the high-temperature burst resistance of the specimens with low strength is better than that of the specimens with high strength. Two specimens were scanned with Industrial Computerized Tomography (ICT) and the microstructures of the specimens were compared. It was found that the samples with higher SiC substitution rates had more minor total pore defects and larger pores.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11818937/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Valorising End-of-Life Mattress Waste into Sustainable Construction Insulation Materials.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-31 DOI: 10.3390/ma18030647

Lachlan Thompson, Md Morshed Alam, Fareed Tamaddoni Jahromi, Mostafa Nikzad

引用次数: 0

Evolution of Microstructure and Mechanical Properties of Ultra-High-Strength Heat-Resistant Bearing Steel During Long-Term Aging at 500 °C.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-31 DOI: 10.3390/ma18030639

Chuncheng Guo, Hongxiao Chi, Jian Zhou, Jinbo Gu, Dangshen Ma, Lili Dong

{"title":"Evolution of Microstructure and Mechanical Properties of Ultra-High-Strength Heat-Resistant Bearing Steel During Long-Term Aging at 500 °C.","authors":"Chuncheng Guo, Hongxiao Chi, Jian Zhou, Jinbo Gu, Dangshen Ma, Lili Dong","doi":"10.3390/ma18030639","DOIUrl":"10.3390/ma18030639","url":null,"abstract":"In this study, various testing methods, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Electron Backscatter Diffraction (EBSD), and high-resolution transmission electron microscopy (HRTEM), were utilized to examine the effects of aging time on the microstructure and mechanical properties of ultra-high-strength heat-resistant bearing steel. The findings revealed that as the aging time progressed, the tensile strength, yield strength, and elongation exhibited an initial increase followed by a decline. Specifically, after 50 h of aging, the tensile strength and yield strength peaked at 2133 MPa and 1874 MPa, respectively. Calculations indicated that precipitation strengthening was the primary contributor to the strength, accounting for 1311 MPa. During the aging process, the martensite laths underwent coarsening, broadening from 202 nm to 306.5 nm, while the residual austenite remained relatively stable. Additionally, dislocations underwent annihilation, resulting in a decrease in dislocation density to 4.84 × 1011/cm2 at 100 h. As the aging time continued to increase, both M6C and M2C phases gradually coarsened. Notably, the number of M2C phases increased, and they transformed from an acicular shape to a spherical shape at 100 h.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11818659/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Fatigue Analysis of Dissimilar Lap Joints Fabricated by Dimple Spot Welding for Automotive Application.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030627

Paolo Livieri, Michele Bortolan

引用次数: 0

Effect of Asphaltenes on the Stability of Water in Crude Oil Emulsions.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030630

Yan Peng, Xiangyu Zhang, Lihua Cheng, Hong Zhang, Jieyun Tang, Hong Chen, Qinzhen Fan, Xinping Ouyang

{"title":"Effect of Asphaltenes on the Stability of Water in Crude Oil Emulsions.","authors":"Yan Peng, Xiangyu Zhang, Lihua Cheng, Hong Zhang, Jieyun Tang, Hong Chen, Qinzhen Fan, Xinping Ouyang","doi":"10.3390/ma18030630","DOIUrl":"10.3390/ma18030630","url":null,"abstract":"The presence of asphaltene, especially in heavy crude oil, causes difficulties in the de-watering/desalting process, which is the initial step of crude oil pretreatment. This study investigates the effect of asphaltenes on the stability of crude oil emulsions using a simulated oil system composed of toluene and n-heptane. It was found that asphaltenes behave like conventional surfactants, adsorbing at the oil-water interface and reducing interfacial tension. The critical aggregation concentration (CAC) of W/O emulsions formed from a toluene and n-heptane mixture (7:3 volume ratio) was found to be 0.05 g/L. When the asphaltene concentration was greater than CAC, the asphaltene aggregated into clusters, forming a viscoelastic interface film that enhanced the strength of the emulsion droplets. At an asphaltene concentration of 0.01 g/L, the storage modulus (G') and loss modulus (G″) were 1.12 Pa·s and 8.94 Pa·s, respectively. The storage modulus G' was less than the loss modulus G″, indicating that the viscoelastic nature of the emulsion, and both the G' and G″ of the emulsions increased with the increasing asphaltene concentration. When the concentration reached 11 g/L, G' and G″ were 1033 Pa·s and 416 Pa·s, respectively, with G' exceeding G″, indicating that the emulsion became more stable. Moreover, increasing the solvent aromaticity led to a rise in the CAC of asphaltene, which was favorable for breaking emulsions. The findings imply that reducing the asphaltene content at the interfaces of oil-water by adding an aromatic solvent or blending with light crude oil is a feasible way to break the emulsion and further dewater and desalt.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11818801/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of Biopowders as Adsorbents of Potentially Toxic Elements Present in Aqueous Solutions.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030625

Vanesa Santás-Miguel, Vanesa Lalín-Pousa, Manuel Conde-Cid, Andrés Rodríguez-Seijo, Paula Pérez-Rodríguez

{"title":"Use of Biopowders as Adsorbents of Potentially Toxic Elements Present in Aqueous Solutions.","authors":"Vanesa Santás-Miguel, Vanesa Lalín-Pousa, Manuel Conde-Cid, Andrés Rodríguez-Seijo, Paula Pérez-Rodríguez","doi":"10.3390/ma18030625","DOIUrl":"10.3390/ma18030625","url":null,"abstract":"This study examines the adsorption and desorption behaviors of phosphorus (P), arsenic (As), fluoride (F), and chromium (Cr) in aqueous solutions on green materials such as cork bark (CB) and pine bark (PB). These materials are characterized by active functional groups and net negative charges on their surfaces and porous structures. The evaluation considers variations in contaminant concentrations (0.01-10 mM) and pH (3.5-12). Cork bark exhibited higher adsorption capacity for As and F, while PB was more effective for P and Cr. Adsorption isotherms followed the Freundlich and Langmuir models, indicating surface heterogeneity and multilayer adsorption for most potentially toxic elements (PTEs). Desorption tests demonstrated low rates, with CB retaining up to 99% of F and 85% of As, and PB achieving up to 86% retention for Cr and 70% for P. The influence of pH was minimal for As, P, and F, but acidic conditions significantly enhanced Cr adsorption, showing similar behavior for both biopowders. These findings suggest that CB and PB biopowders are promising, environmentally friendly biosorbents for the removal of PTEs from aqueous solutions. Their effectiveness varies depending on the specific contaminant. This study highlights the potential of these natural materials for sustainable applications in water treatment and soil remediation.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11819779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143409083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Influence of Basil and Cinnamon Essential Oils on Bioactive Sponge Composites of Collagen Reinforced with Hydroxyapatite.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030626

Alina Robu, Madalina Georgiana Albu Kaya, Aurora Antoniac, Durmuș Alpaslan Kaya, Alina Elena Coman, Maria-Minodora Marin, Robert Ciocoiu, Rodica Roxana Constantinescu, Iulian Antoniac

{"title":"The Influence of Basil and Cinnamon Essential Oils on Bioactive Sponge Composites of Collagen Reinforced with Hydroxyapatite.","authors":"Alina Robu, Madalina Georgiana Albu Kaya, Aurora Antoniac, Durmuș Alpaslan Kaya, Alina Elena Coman, Maria-Minodora Marin, Robert Ciocoiu, Rodica Roxana Constantinescu, Iulian Antoniac","doi":"10.3390/ma18030626","DOIUrl":"10.3390/ma18030626","url":null,"abstract":"The increasing prevalence of acute traumas, surgical wounds, and chronic skin wounds poses significant therapeutic challenges for wound treatment. One of the main concerns in wound care is the danger of infection, which is a significant barrier to healing and a cause of higher morbidity and mortality rates. The emergence of drug-resistant bacterial species is becoming more frequent every day. Antimicrobial dressings have become a viable strategy for wound healing and hospital expense savings. Several factors, such as the wound's localization and state, microbial load, and cost, must be considered when choosing an appropriate antimicrobial dressing. One of the key goals of wound care is infection avoidance. This study addresses the therapeutic challenges of acute traumas, surgical wounds, and chronic skin wounds, focusing on infection prevention and combating drug-resistant bacterial strains. The research explores the development of novel composite wound dressings incorporating hydroxyapatite, known for its osteoconductive properties, and essential oils from basil and cinnamon, recognized for their antimicrobial activity. The study evaluates the impact of these additives on key properties such as surface morphology, water absorption, enzymatic degradation, and mechanical performance. Antimicrobial tests showed that two experimental samples (A1S and A1BS) exhibited significant activity against Escherichia coli but not on Staphylococcus aureus. The results highlight the dressings' enhanced antimicrobial properties, mechanical strength, and controlled degradation, making them promising candidates for advanced wound healing. Tailored applications were identified, with each dressing composition offering unique benefits for specific wound-healing scenarios based on the balance between flexibility, structural support, and bioactivity.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11818753/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Study of Physicochemical and Adsorption Properties of Alginate Composites.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030629

Małgorzata Wasilewska, Sylwia Gubernat, Paulina Gil-Kulik

{"title":"Preparation and Study of Physicochemical and Adsorption Properties of Alginate Composites.","authors":"Małgorzata Wasilewska, Sylwia Gubernat, Paulina Gil-Kulik","doi":"10.3390/ma18030629","DOIUrl":"10.3390/ma18030629","url":null,"abstract":"This paper presents the preparation and study of the properties of alginate materials, which were obtained on the basis of sodium alginate, activated carbon, cellulose, and calcium chloride. Alginate-carbon (AlgCa + C) and alginate-cellulose (AlgCa + Cel) composites, as well as pure calcium alginate (AlgCa) for comparative purposes, were obtained. Their textural (nitrogen adsorption/desorption isotherms), morphological (scanning electron microscopy), thermal (thermal analysis), and acid-base (pH drift method) properties, as well as the swelling index, were investigated. Additionally, to determine the adsorption properties, comprehensive equilibrium and kinetic studies of the adsorption of sodium salts of ibuprofen (IBP), diclofenac (D), and naproxen (NPX) from aqueous solutions on biocomposities were carried out. Adsorption isotherms were fitted using the Marczewski-Jaroniec isotherm equation (R2 = 0.941-0.988). Data on the adsorption rate were analyzed using simple kinetic equations, of which the best quality of fit was obtained using the multi-exponential equation (R2 - 1 = (3.9 × 10-4)-(6.9 × 10-4)). The highest obtained adsorption values were reached in systems with alginate-carbon composite and were 1.23 mmol/g for NPX, 0.81 mmol/g for D, and 0.43 mmol/g for IBP. The AlgCa + C material was characterized by a large specific surface area (1151 m2/g), a high degree of swelling (300%) and high resistance to high temperatures.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11818849/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface Structure Effects on H and O Adsorption on Gold, Nickel and Platinum Nanoparticles.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030631

Nadezhda V Dokhlikova, Andrey K Gatin, Sergey Y Sarvadii, Dinara Tastaibek, Vladislav G Slutskii, Maxim V Grishin

引用次数: 0

Surface Quality and Compressive Properties of Mortise and Tenon Lattice Structures Fabricated by Fused Deposition Modeling.

IF 3.1 3区材料科学

Materials Pub Date : 2025-01-30 DOI: 10.3390/ma18030628

Bin Li, Byung-Won Min, Hai Gu, Jie Jiang, Jie Zhang, Hao Zhang

{"title":"Surface Quality and Compressive Properties of Mortise and Tenon Lattice Structures Fabricated by Fused Deposition Modeling.","authors":"Bin Li, Byung-Won Min, Hai Gu, Jie Jiang, Jie Zhang, Hao Zhang","doi":"10.3390/ma18030628","DOIUrl":"10.3390/ma18030628","url":null,"abstract":"To address the anisotropy of mechanical properties and the challenge of removing support materials in lattice structures fabricated using fused deposition modeling (FDM), this study is inspired by traditional woodworking mortise and tenon joints. A hexagonal interlocking mortise lattice structure was designed, and mortise and tenon lattice structures (MTLSs) with various parameters were fabricated. Compared with the traditional integrated forming lattice structure (IFLS), the MTLS exhibits maximum reductions in side surface roughness (Ra), printing time, and material consumption of 74.87%, 25.55%, and 52.21%, respectively. In addition to enhancing surface quality and printing efficiency, the MTLS also exhibited superior mechanical properties. The uniaxial compression test results show that the specific strength, energy absorption (EA), and specific energy absorption (SEA) of the MTLS exhibit maximum increases of 51.22%, 894.59%, and 888.39%, respectively, compared with the IFLS. Moreover, the effects of strut angle and thickness on the lattice structure were analyzed. Smaller strut angles and larger strut thicknesses endowed greater strength, while smaller angles contributed to higher energy absorption. This study proposes a novel approach for designing lattice structures in additive manufacturing.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11818364/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143408431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0