Materials最新文献_第9页

Geometric Accuracy and Mechanical Property Enhancement of Fe-Based Alloy Layers in Wide-Beam Laser Direct Energy Deposition. 宽光束激光直接能量沉积铁基合金层几何精度和力学性能的提高。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184350

Bin Hu, Junhua Wang, Junfei Xu, Qingyang Wang, Li Zhang

{"title":"Geometric Accuracy and Mechanical Property Enhancement of Fe-Based Alloy Layers in Wide-Beam Laser Direct Energy Deposition.","authors":"Bin Hu, Junhua Wang, Junfei Xu, Qingyang Wang, Li Zhang","doi":"10.3390/ma18184350","DOIUrl":"10.3390/ma18184350","url":null,"abstract":"Laser direct energy deposition (LDED) has been widely employed in surface modification and remanufacturing. Achieving high-precision geometries and superior mechanical properties in cladding layers remains a persistent research focus. In this study, an Fe-based alloy was deposited on an AISI 1045 substrate via a wide-beam laser cladding system. Single-track multi-layer samples were prepared with varying z-increment (Zd), interlayer dwell time (TI) and laser scanning speed (V) values. The geometry, microstructure, microhardness and wear resistance of the samples were analyzed. Experimental results showed that an estimated Zd can ensure a constant standoff distance of the laser head and resulting geometric accuracy improvement. Planar grains form at the layer-substrate bonding interface and transition to columnar grains adjacently, while dendrites and equiaxed grains are distributed in the middle and top regions of the layer. The coating layer exhibits much better wear resistance and friction properties than the substrate. The cooling rate can be substantially increased by either raising V or prolonging TI, resulting in refined grain structures and enhanced microhardness. Real-time monitoring and controlling the mean cooling rate have been demonstrated to be effective strategies for enhancing cladding layer performance.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471669/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176463","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

Synthesis and Characterization of Curcumin-Polycaprolactone Block Copolymers for Biomedical Applications. 姜黄素-聚己内酯嵌段共聚物的合成与表征。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184348

Qianqian Wei, Adam Junka, Bartlomiej Dudek, Houman Alimoradi, Julia Simińska-Stanny, Lei Nie, Oseweuba Valentine Okoro, Armin Shavandi

{"title":"Synthesis and Characterization of Curcumin-Polycaprolactone Block Copolymers for Biomedical Applications.","authors":"Qianqian Wei, Adam Junka, Bartlomiej Dudek, Houman Alimoradi, Julia Simińska-Stanny, Lei Nie, Oseweuba Valentine Okoro, Armin Shavandi","doi":"10.3390/ma18184348","DOIUrl":"10.3390/ma18184348","url":null,"abstract":"Polycaprolactone (PCL) is widely utilized in biomedical applications such as tissue engineering and drug delivery; however, its limited bioactivity remains a key challenge. In this study, bioactive curcumin-polycaprolactone block copolymers (MCP) were synthesized via ring-opening polymerization of ε-caprolactone and maleic anhydride modified curcumin. The resulting MCP was characterized using FTIR, 1H NMR, UV-Vis spectroscopy, and differential scanning calorimetry (DSC). It demonstrated enhanced antioxidant activity, UV-blocking capacity, and electro spinnability compared to PCL. Electrospun MCP films exhibited improved biocompatibility and promoted fibroblast migration. Furthermore, composite films incorporating MCP into a PVA matrix with and without copper or iron were evaluated for in vivo toxicity and antimicrobial activity. These formulations showed no systemic or contact toxicity in the Galleria mellonella model, confirming their biocompatibility. Films containing copper or iron exhibited selective anti-Pseudomonas aeruginosa activity and low but reproducible antioxidant capacity. This study highlights the multifunctionality and biomedical potential of MCP and its composites as tunable platforms for regenerative and antimicrobial applications.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471959/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176354","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

Towards a New Plastination Technique for Moisture Management of Western Red Cedar Without Loss of Strength and with Enhanced Stability. 一种既不损失强度又提高稳定性的西部红杉水分管理塑化新技术研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184353

Olivia H Margoto, Madisyn M Szypula, Grant R Bogyo, Victor Yang, Abbas S Milani

{"title":"Towards a New Plastination Technique for Moisture Management of Western Red Cedar Without Loss of Strength and with Enhanced Stability.","authors":"Olivia H Margoto, Madisyn M Szypula, Grant R Bogyo, Victor Yang, Abbas S Milani","doi":"10.3390/ma18184353","DOIUrl":"10.3390/ma18184353","url":null,"abstract":"Amidst environmental concerns regarding the use of petroleum-based materials, wood and wood-based products are among the key players in the pursuit of green construction practices. However, environmental degradation of these materials remains a concern during structural design, particularly for outdoor applications. Borrowed from anatomy to preserve human body parts, this study applies and assesses a technique called 'plastination' as a new means for moisture management of Western Red Cedar (WRC). Specifically, the proposed technique includes acetone dehydration of WRC, followed by SS-151 silicone vacuum-assisted impregnation and silicone curing. To evaluate the method's effectiveness, Micro X-ray Computed Tomography (μCT), Fourier Transform Infrared (FTIR) Spectroscopy, Thermogravimetric Analysis (TGA), and static water contact angle measurements were employed. Tensile testing was also performed to quantify the treatment's effect on WRC's mechanical properties under moisture conditioning. μCT confirmed an impregnation depth of 21.5%, while FTIR and TGA results showed reduced moisture retention (3.6 wt%) in plastinated WRC due to the absence of hydroxyl groups. Mechanical testing revealed enhanced deformability in treated samples without compromising tensile strength. Upon moisture conditioning, plastinated WRC retained its tensile properties and showed 59% lower moisture absorption and 15% lower weight as compared to conditioned virgin samples.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471767/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176359","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

Studying How Calcium Silicate and Radiopacifier Proportions Affect the Physicochemical Properties of Endodontic Calcium Silicate-Based Sealers. 硅酸钙与放射性不透光剂配比对根管硅酸钙基密封剂理化性能影响的研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184340

Raimundo Sales de Oliveira Neto, Guilherme Ferreira da Silva, Tany Carvalho Moreira da Veiga, Stefani Jovedi Rosa, Brenda Stefhany Wilchenski de Souza, Rodrigo Ricci Vivan, Murilo Priori Alcalde, Marco Antonio Hungaro Duarte

{"title":"Studying How Calcium Silicate and Radiopacifier Proportions Affect the Physicochemical Properties of Endodontic Calcium Silicate-Based Sealers.","authors":"Raimundo Sales de Oliveira Neto, Guilherme Ferreira da Silva, Tany Carvalho Moreira da Veiga, Stefani Jovedi Rosa, Brenda Stefhany Wilchenski de Souza, Rodrigo Ricci Vivan, Murilo Priori Alcalde, Marco Antonio Hungaro Duarte","doi":"10.3390/ma18184340","DOIUrl":"10.3390/ma18184340","url":null,"abstract":"This study evaluated how varying calcium silicate (30-50%) and radiopacifier (45-65%) ratios affected the physicochemical properties of experimental sealers (P1-P3) compared to Bio-C Sealer, AH Plus Bioceramic, and AH Plus Jet. Properties such as flowability, solubility, and radiopacity were assessed per ISO 6876/2012, and setting time followed ASTM C266-2008. pH and volumetric changes were measured in acrylic teeth (n = 10) filled with each sealer, with pH evaluated at 3, 24, 72, and 168 h, and volume changes assessed via micro-CT at baseline and after 7 days. P1 showed setting time similar to AH Plus Bioceramic (p > 0.05). All calcium silicate-based sealers had greater solubility than AH Plus Jet (p < 0.05), with only P3 meeting ISO standards. P1 and AH Plus Jet exhibited higher radiopacity (p < 0.05). Bio-C Sealer and AH Plus Bioceramic had more volume change than P2 (p < 0.05). All experimental sealers showed stable volume and increasing alkalinity, peaking at 72h. Bio-C Sealer showed a consistent pH rise, except between 24 and 168 h (p > 0.05). Sealer properties were strongly influenced by the composition. P1 (30% calcium silicate/65% radiopacifier) had superior flowability and radiopacity, while P3 (50% calcium silicate/45% radiopacifier) was the only one to meet solubility standards.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472052/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176305","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

Geometric Analysis and Experimental Studies of Hexachiral Structures. 六手体结构的几何分析与实验研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184344

Julian Plewa, Małgorzata Płońska, Kamil Feliksik, Grzegorz Junak

{"title":"Geometric Analysis and Experimental Studies of Hexachiral Structures.","authors":"Julian Plewa, Małgorzata Płońska, Kamil Feliksik, Grzegorz Junak","doi":"10.3390/ma18184344","DOIUrl":"10.3390/ma18184344","url":null,"abstract":"Chiral metamaterial structures exhibit auxetic properties-when subjected to stress, they either contract or expand in the given direction, while maintaining an asymmetric geometric effect-they cannot overlap with their mirror image. The unit cells of hexachiral structures take the form of cylindrical nodes with ligaments attached to them. Under the action of external compressive forces, the ligaments bend and coil around the nodes. This is accompanied by a negative Poisson's ratio approaching minus one. In this case, it has been demonstrated both theoretically and experimentally that this value is independent of the degree of compression. In the course of geometric analysis, the value of Poisson's ratio has been shown to depend on the number of unit cells in the structure, and with a large number of unit cells, it reaches the theoretical value of minus one. The experiments were conducted on structures assembled from printed nodes and ligaments. It has been demonstrated that, as a result of uniaxial compression, various parts of the structure undergo distinct deformations. However, structures subjected to multi-directional compression-as elastic energy reservoirs-also exhibited negative Poisson's ratio values close to minus one, with their magnitude dependent on the degree of compression.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471461/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176384","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

Experimental and Numerical Studies of Two- and Three-Layer Corrugated Boards in Bending Test. 两层和三层瓦楞纸板弯曲试验与数值研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184351

Gabriela Kmita-Fudalej, Leszek Czechowski

引用次数: 0

Effect of Water Film Induced by Wet Shot Peening on Dimple Size and Residual Stress Distribution. 湿喷丸强化水膜对韧窝尺寸和残余应力分布的影响。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184347

Chao Fang, Zhongjin Wang

引用次数: 0

Finite Element Simulation and Experiment for Electromagnetic Flanging Forming of Aluminum Alloy Sheet. 铝合金板材电磁翻边成形有限元模拟与试验。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184345

Zhengrong Zhang, Jingchao Yao, Fei Wu, Jun Zhang, Chaojun Chen, Chun Huang

{"title":"Finite Element Simulation and Experiment for Electromagnetic Flanging Forming of Aluminum Alloy Sheet.","authors":"Zhengrong Zhang, Jingchao Yao, Fei Wu, Jun Zhang, Chaojun Chen, Chun Huang","doi":"10.3390/ma18184345","DOIUrl":"10.3390/ma18184345","url":null,"abstract":"In order to address the problem of the large gap in the film on the straight edge of the electromagnetic flanging forming by the flat coil affecting the quality of the flanging part, a multi-layer variable-turn stepped coil is proposed. Numerical simulation analysis and experimental research were conducted on the electromagnetic flanging forming process of flat coil and stepped coil. Research shows that in the early stage of forming, the electromagnetic force of the flat coil is uniformly distributed at the edge of the hole and the middle of the deformation zone of the sheet metal, causing the upper surface of the middle of the deformation zone of the sheet metal to present radial compressive stress and tangential compressive stress, and the upper surface of the sheet metal at the fillet of the die to present radial tensile strain, tangential compressive strain and thickness direction compressive strain. The electromagnetic force of the step coil is mainly concentrated at the hole edge of the sheet metal, causing the upper surface in the middle of the deformation zone of the sheet metal to present radial tensile stress and tangential tensile stress, as well as radial tensile strain, tangential and thickness direction compressive strain. Under the flat coil, the sheet material mainly undergoes plastic deformation under the action of axial electromagnetic force and can only be bent into a curved edge. Under the stepped coil, the sheet metal undergoes plastic deformation simultaneously under the combined action of axial and radial electromagnetic forces and can be flipped into a vertical edge. The feasibility of the electromagnetic flanging forming of the stepped coil was verified through experiments, and the experimental results were basically consistent with the simulation results.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472023/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176317","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

Sustainable Design and Environmental Effects of π-Conjugated Thiophene Surfactants for Optoelectronic Applications. 光电应用中π共轭噻吩表面活性剂的可持续设计及其环境效应。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184349

Catalina Stoica, Hisham Idriss, Justin Z Lian, Julie-Lisa Malaval, Anca-Maria Patrascu, Alina Roxana Banciu, Stefano Cucurachi, Sébastien Richeter, Sébastien Clément, Mihai Nita-Lazar

{"title":"Sustainable Design and Environmental Effects of π-Conjugated Thiophene Surfactants for Optoelectronic Applications.","authors":"Catalina Stoica, Hisham Idriss, Justin Z Lian, Julie-Lisa Malaval, Anca-Maria Patrascu, Alina Roxana Banciu, Stefano Cucurachi, Sébastien Richeter, Sébastien Clément, Mihai Nita-Lazar","doi":"10.3390/ma18184349","DOIUrl":"10.3390/ma18184349","url":null,"abstract":"Electronic waste is becoming a growing global pollution issue due to short device lifespans and insufficient safe disposal methods. Hazardous metals like arsenic and mercury from electronic waste harm both the environment and human health. Recycling processes remain underdeveloped, requiring new eco-friendly solutions. This paper reports on the synthesis and properties of the cationic surfactants ammonium terthiophene (CTT) and 3,4-propylene-dioxythiophene (C-ProDOT), which may have potential use in organic electronics. Ecotoxicological tests showed no significant long-term toxicity and medium-to-high biodegradability, which are keys for environmental protection. These surfactants also displayed selective bacterial adhesion, making them candidates for bionic devices. Life cycle assessment revealed higher energy use and ecotoxicity for C-ProDOT than CTT, underscoring the need for sustainable chemical design.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471932/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176329","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

Temperature-Dependent Microstructure and Tribological Performance of Boride Layers Formed on 40 Kh Steel Using Boric Acid-Based Boriding. 硼酸基渗硼在40kh钢上形成的硼化物层的温度相关组织和摩擦学性能。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-17 DOI: 10.3390/ma18184342

Laila Sulyubayeva, Daryn Baizhan, Nurbol Berdimuratov, Dastan Buitkenov, Balym Alibekova

{"title":"Temperature-Dependent Microstructure and Tribological Performance of Boride Layers Formed on 40 Kh Steel Using Boric Acid-Based Boriding.","authors":"Laila Sulyubayeva, Daryn Baizhan, Nurbol Berdimuratov, Dastan Buitkenov, Balym Alibekova","doi":"10.3390/ma18184342","DOIUrl":"10.3390/ma18184342","url":null,"abstract":"Boriding is widely used in various industries due to the unique combination of high mechanical, corrosion, and tribological properties of boride layers formed on the surface of steel components. In this work, the powder boriding of 40 Kh steel was investigated in a closed capsule using a specially prepared powder mixture containing boric acid as the boron source. Boriding was carried out in a furnace at 850, 900, and 950 °C for 10 h. The resulting boride layers were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD), which confirmed that all three coatings consist exclusively of the Fe2B phase. It was found that with increasing temperature, the thickness of the boride layer increased from 68 μm to 160 μm. The tribological properties were evaluated using the pin-on-disk method, followed by analysis of the wear surfaces using optical profilometry and SEM. The most significant reduction in wear rate was observed at 850 °C, where the wear decreased by a factor of 4.2-from 8.471 × 10-5 to 1.999 × 10-5 mm3·N-1·m-1. In addition, the hardness increased fivefold compared to the untreated material. These results demonstrate the high potential of diffusion boriding for enhancing the operational performance of parts subjected to severe wear conditions.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471642/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176368","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