Materials最新文献_第3页

Advanced Platelet-Rich Fibrin Plus Sealed Exclusively with Glass Ionomer Cement: Setting a New Standard for Healing, Aesthetics and Predictive Modelling in Regenerative Endodontics. 先进的富含血小板的纤维蛋白加密封完全与玻璃离子水泥：设置愈合，美学和再生牙髓学预测模型的新标准。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-22 DOI: 10.3390/ma18184421

Dubravka Turjanski, Dragutin Lisjak, Petra Bučević Sojčić, Jelena Valpotić, Tea Borojević Renić, Kristina Goršeta, Domagoj Glavina

{"title":"Advanced Platelet-Rich Fibrin Plus Sealed Exclusively with Glass Ionomer Cement: Setting a New Standard for Healing, Aesthetics and Predictive Modelling in Regenerative Endodontics.","authors":"Dubravka Turjanski, Dragutin Lisjak, Petra Bučević Sojčić, Jelena Valpotić, Tea Borojević Renić, Kristina Goršeta, Domagoj Glavina","doi":"10.3390/ma18184421","DOIUrl":"10.3390/ma18184421","url":null,"abstract":"Regenerative endodontic approaches for immature necrotic permanent teeth must balance biological efficacy, clinical practicality and long-term aesthetic outcomes. This study evaluates a novel regenerative protocol using autologous advanced platelet-rich fibrin plus (A-PRF+) scaffold sealed exclusively with glass ionomer cement (GIC) and compares it to conventional calcium hydroxide apexification used as the control. Twenty-eight patients were prospectively enrolled and followed for 12 months alongside a retrospectively selected historical control group. Outcomes were evaluated through standardised blinded clinical, radiographic and vitality assessments. The A-PRF+ protocol demonstrated significantly faster periapical healing, superior root lengthening, increased dentinal wall thickness and apical closure (p < 0.0001), with excellent aesthetic outcomes and no reported tooth discolouration. Pulpal blood flow measured by laser Doppler flowmetry indicated vitality restoration in 93% of cases. Preliminary linear regression identified treatment duration as a significant predictor of apical closure (p < 0.0001), with possible enhancement by additional patient-specific variables. These findings validate the A-PRF+ protocol as a highly effective, aesthetically favourable and predictable regenerative strategy, establishing a new benchmark for the management of immature necrotic teeth and laying the foundation for personalised predictive endodontic care. Future studies should include multicentre randomised controlled trials to confirm long-term clinical sustainability and generalisability.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471794/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145175865","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

Carbon-Induced Structural Evolution and Synergistic Enhancement of Wear and Corrosion Resistance in (AlFeCoNi)C High-Entropy Alloy Carbide Films. （AlFeCoNi）C高熵合金碳化物薄膜碳致结构演化及耐磨损和耐腐蚀协同增强

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-22 DOI: 10.3390/ma18184411

Duoli Chen, Yefeng Zhou, Xianting Yang, Mengyuan Guo, Jun Liang, Deming Huang, Yu Ni, Yurong Zhou, Yantao Li, Xin Jiang

{"title":"Carbon-Induced Structural Evolution and Synergistic Enhancement of Wear and Corrosion Resistance in (AlFeCoNi)C High-Entropy Alloy Carbide Films.","authors":"Duoli Chen, Yefeng Zhou, Xianting Yang, Mengyuan Guo, Jun Liang, Deming Huang, Yu Ni, Yurong Zhou, Yantao Li, Xin Jiang","doi":"10.3390/ma18184411","DOIUrl":"10.3390/ma18184411","url":null,"abstract":"The (AlFeCoNi)C high-entropy alloy carbide films (HECFs) with tunable carbon contents were fabricated by magnetron sputtering to investigate the carbon-driven structural evolution and its coupling effects on mechanical and chemical properties. With increasing carbon incorporation (0-47.6 at.%), the HECFs formed a composite structure of amorphous phase and BCC nanocrystalline phase, as evidenced by XRD and TEM. Atom probe tomography (APT) reveals Al segregation in the film. Remarkably, the wear rate decreases exponentially from 4.8 × 10-5 to 6.7 × 10-6 mm3/N·m, attributed to the amorphous carbon phase acting as solid lubricant. Simultaneously, the corrosion current density reduces by two orders of magnitude (7.2 × 10-8 A/cm2 in 3.5% NaCl), benefiting from the amorphous network inhibiting ion diffusion pathways. This work establishes a carbon-content-property correlation paradigm for designing multifunctional HEA films in extreme environments.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472169/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176299","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

Damage Localization and Sensor Layout Optimization for In-Service Reinforced Concrete Columns Using Deep Learning and Acoustic Emission. 基于深度学习和声发射的在役钢筋混凝土柱损伤定位与传感器布局优化。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184406

Tao Liu, Aiping Yu, Zhengkang Li, Menghan Dong, Xuelian Deng, Tianjiao Miao

{"title":"Damage Localization and Sensor Layout Optimization for In-Service Reinforced Concrete Columns Using Deep Learning and Acoustic Emission.","authors":"Tao Liu, Aiping Yu, Zhengkang Li, Menghan Dong, Xuelian Deng, Tianjiao Miao","doi":"10.3390/ma18184406","DOIUrl":"10.3390/ma18184406","url":null,"abstract":"As the main load-bearing components of engineering structures, regular health assessment of reinforced concrete (RC) columns is crucial for improving the service life and overall performance of the structures. This study focuses on the health detection problem of in-service RC columns. By combining deep learning algorithms and acoustic emission (AE) technology, the AE sources of in-service RC columns are located, and the optimal sensor layout form for the health monitoring of in-service RC columns is determined. The results show that the data cleaning method based on the k-means clustering algorithm and the voting selection concept can significantly improve the data quality. By comparing the localization performance of the Back Propagation (BP), Radial Basis Function (RBF) and Support Vector Regression (SVR) models, it is found that compared with the RBF and SVR models, the MAE of the BP model is reduced by 7.513 mm and 6.326 mm, the RMSE is reduced by 9.225 mm and 8.781 mm, and the R2 is increased by 0.059 and 0.056, respectively. The BP model has achieved good results in AE source localization of in-service RC columns. By comparing different sensor layout schemes, it is found that the linear arrangement scheme is more effective for the damage location of shallow concrete matrix, while the hybrid linear-volumetric arrangement scheme is better for the damage location of deep concrete matrix. The hybrid linear-volumetric arrangement scheme can simultaneously detect damage signals from both shallow and deep concrete matrix, which has certain application value for the health monitoring of in-service RC columns.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471890/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176366","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

Bacterial Tolerance and Bioleaching in the Presence of Chloride. 氯离子存在下的细菌耐受性和生物浸出。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184407

Narine Vardanyan, Anna Khachatryan, Zaruhi Melkonyan, Nelli Abrahamyan, Sona Barseghyan, Ruiyong Zhang, Arevik Vardanyan

{"title":"Bacterial Tolerance and Bioleaching in the Presence of Chloride.","authors":"Narine Vardanyan, Anna Khachatryan, Zaruhi Melkonyan, Nelli Abrahamyan, Sona Barseghyan, Ruiyong Zhang, Arevik Vardanyan","doi":"10.3390/ma18184407","DOIUrl":"10.3390/ma18184407","url":null,"abstract":"Chloride ions can enhance the bioleaching of copper minerals, yet most biomining microorganisms are highly sensitive to chloride and cannot survive or colonize mineral surfaces in saline environments. Chloride tolerance varies among acidophilic iron-oxidizing bacteria, but the concentrations at which they remain active are generally too low to permit the industrial use of seawater. Therefore, identifying highly chloride-tolerant leaching microorganisms and studying their bioleaching potential in chloride-containing systems is of utmost importance. This study investigated chloride tolerance and adaptability of bacteria from different genera, with a focus on Sulfobacillus thermosulfidooxidans subsp. asporogenes 41, a moderately thermophilic strain that can oxidize both Fe (II) and reduced inorganic sulfur compounds (RISCs). This dual activity makes it advantageous for bioleaching by facilitating sulfur removal, generating acidity, and preventing mineral passivation. Comparative experiments on the bioleaching of pyrite and chalcopyrite demonstrated that adaptation to 0.3 M NaCl enhanced the chloride tolerance of S. thermosulfidooxidans subsp. asporogenes 41. The adapted strain exhibited significantly improved copper extraction under saline conditions compared with the native culture. Maximum copper recovery was achieved at 0.4 M NaCl, highlighting the potential of chloride-adapted moderate thermophiles for biomining applications in saline environments. In contrast the minimal inhibitory concentration for Acidithiobacillud ferrooxidans Dr was 0.005 M (causing 41.2% inhibition), while Leptospirillum ferriphilum CC was unaffected by lower concentrations (0.01-0.02 M) and only showed severe inhibition (86.5%) at 0.1 M NaCl, defining its minimal inhibitory concentration (MIC) at 0.05 M.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471521/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176257","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

Formability and Electromagnetic Performance Comparison of Fe-P-Based SMC and Fe-5.0 wt.%Si Powders. fe - p基SMC与Fe-5.0 wt.%Si粉末成形性能及电磁性能比较。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184405

Seongsu Kang, Seonbong Lee

{"title":"Formability and Electromagnetic Performance Comparison of Fe-P-Based SMC and Fe-5.0 wt.%Si Powders.","authors":"Seongsu Kang, Seonbong Lee","doi":"10.3390/ma18184405","DOIUrl":"10.3390/ma18184405","url":null,"abstract":"This study investigates the comparative applicability of Somaloy 700HR 5P and Fe-5.0 wt.%Si powders for axial flux permanent magnet (AFPM) motor cores in low-speed electric vehicles. Optimal forming conditions were derived through Taguchi-based simulations, considering corner radius, forming temperature, and forming speed, followed by prototype fabrication and validation. Simulation and SEM-EDS analyses confirmed consistent density distribution trends, and XRD verified phase stability during forming. While Fe-5.0 wt.%Si exhibited ~10% ± 2 superior electromagnetic performance in the powder state, its motor dynamo performance decreased by 19-25% (n = 1) compared to Somaloy 700HR 5P. This discrepancy was attributed to its ~4% lower target density (7.19 ± 0.02 g/cm3 vs. 7.51 ± 0.01 g/cm3, n = 3), assembly-induced mechanical losses, and non-uniform insulation layer caused by residual H3PO4 and Mo segregation. Somaloy 700HR 5P, despite a higher relative density variation (0.084 ± 0.002 g/cm3 vs. 0.063 ± 0.003 g/cm3 for Fe-5.0 wt.%Si), achieved an average density close to 7.5 g/cm3 and delivered more stable motor performance. Overall, Somaloy 700HR 5P was identified as a more suitable candidate for AFPM motor cores in low-speed EV applications, balancing formability and electromagnetic performance.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472011/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176376","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

Characteristics of Acrylic Produced Additively by 3D Printing in Dentistry: Comparison of Mechanical and Surface Parameters-A Systematic Review with Meta-Analysis of Novel Reports. 牙科3D打印增材生产丙烯酸的特点：机械参数和表面参数的比较-对新报告的荟萃分析的系统回顾。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184409

Paweł Szymlet, Maciej Jedliński, Wojciech Frąckiewicz, Aleksandra Jankowska, Aleksandra Wdowiak-Szymanik, Ewa Sobolewska

{"title":"Characteristics of Acrylic Produced Additively by 3D Printing in Dentistry: Comparison of Mechanical and Surface Parameters-A Systematic Review with Meta-Analysis of Novel Reports.","authors":"Paweł Szymlet, Maciej Jedliński, Wojciech Frąckiewicz, Aleksandra Jankowska, Aleksandra Wdowiak-Szymanik, Ewa Sobolewska","doi":"10.3390/ma18184409","DOIUrl":"10.3390/ma18184409","url":null,"abstract":"Background/Objectives: This systematic review and meta-analysis aimed to compare the mechanical and surface properties of three-dimensional (3D) printed and conventionally polymerized acrylic resins. Methods: A comprehensive search of four electronic databases (PubMed, Embase, Scopus, and Web of Science) was conducted to identify in vitro studies evaluating impact strength, elastic modulus, surface hardness, and surface roughness. Study quality was assessed using design-specific evaluation tools. When sufficient homogeneous data were available, a meta-analysis was performed. Results: The initial search yielded 942 potentially relevant records. Fifteen studies met the criteria for qualitative synthesis, and 13 were included in the meta-analysis. All studies were in vitro and were rated as having moderate to high methodological quality. Conclusions: Although conventional acrylic resins currently demonstrate superior mechanical strength, 3D-printed materials exhibit comparable surface properties and continue to evolve rapidly. Additive manufacturing technologies show promise as a viable and effective alternative for future prosthodontic applications.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472056/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176362","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

Reduction Study of Carbon-Bearing Briquettes in the System of Multiple Reductants. 多还原剂体系中含碳型煤的还原研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184408

Xiaojun Ning, Zheng Ren, Nan Zhang, Guangwei Wang, Xueting Zhang, Junyi Wu, Jiangbin Liu, Andrey Karasev, Chuan Wang

{"title":"Reduction Study of Carbon-Bearing Briquettes in the System of Multiple Reductants.","authors":"Xiaojun Ning, Zheng Ren, Nan Zhang, Guangwei Wang, Xueting Zhang, Junyi Wu, Jiangbin Liu, Andrey Karasev, Chuan Wang","doi":"10.3390/ma18184408","DOIUrl":"10.3390/ma18184408","url":null,"abstract":"Against the backdrop of escalating global carbon emissions, the steel industry urgently requires a transition toward green and low-carbon practices. As a conditionally carbon-neutral renewable energy source, biochar holds potential for replacing traditional fossil-based reducing agents. This study aims to investigate the mechanism and performance differences between biochar (wood char, bamboo char) and conventional reducing agents (semi-coke, coke powder, anthracite) in the direct reduction process of carbon-bearing briquettes. Through reduction experiments simulating rotary kiln conditions, combined with analysis of reducing agent gasification characteristics, carbon-to-oxygen (C/O) molar ratio control, X-ray diffraction (XRD), and microstructural examination, the high-temperature behavior of different reducing agents was systematically evaluated. Results indicate that biochar exhibits superior gasification reactivity due to its high specific surface area and developed pore structure: wood char and bamboo char show significantly enhanced reaction rates above 1073 K, approaching complete conversion at 1173 K. In contrast, anthracite and coke powder, characterized by dense structures and low specific surface areas, failed to achieve complete gasification even at 1273 K. Pellets containing bamboo char achieved the highest metallization rate (90.16%) after calcination at 1373 K. The compressive strength of the pellets first decreased and then increased with rising temperature, consistent with the trend in metallization rate. The mechanism analysis indicates that the high reactivity and porous structure of biochar promote rapid CO diffusion and synergistic gas-solid reactions, significantly accelerating the reduction of iron oxides and the formation of metallic iron.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471544/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176396","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

Corrosion Behaviors of ZrSi Coating by Laser Cladding on Zr-4 Alloy in High-Temperature Steam. Zr-4合金激光熔覆ZrSi涂层在高温蒸汽中的腐蚀行为

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184402

Dongliang Jin, Changda Zhu, Xiqiang Ma, Zhengxian Di, Shizhong Wei

{"title":"Corrosion Behaviors of ZrSi Coating by Laser Cladding on Zr-4 Alloy in High-Temperature Steam.","authors":"Dongliang Jin, Changda Zhu, Xiqiang Ma, Zhengxian Di, Shizhong Wei","doi":"10.3390/ma18184402","DOIUrl":"10.3390/ma18184402","url":null,"abstract":"Si powder was deposited onto the surface of Zr-4 alloy via laser cladding to enhance its high-temperature oxidation resistance. The high-power laser radiation and rapid solidification lead to a reaction between Si and Zr, resulting in the formation of a microstructure consisting of lath-like ZrSi2 and Si-rich phases. The oxidation behavior of the laser-cladding ZrSi coating was evaluated at 1100-1300 °C in water steam. The weight gain follows a parabolic law, and the oxidation activation energy of the ZrSi coating is 182.7 kJ mol-1. The oxides produced by ZrSi2 oxidation are mainly ZrSiO4, ZrO2, and SiO2, and, under high-temperature conditions, the relative content of ZrSiO4 in the oxide decreases with increasing temperature. The oxidation of the ZrSi2 phase induces significant growth stresses, which are susceptible to causing cracks in the oxide, facilitating accelerated oxygen diffusion into the coating. However, the amorphous SiO2 formed at 1300 °C, which may be softened and fluidized to enable a self-healing effect, can heal the cracks to diminish oxygen permeation into the coating, improving its oxidation resistance. The oxidation resistance of the laser cladding ZrSi coating is better than that of the Zr-4 alloy.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471415/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176356","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

Influence of Porosity Gradient Distribution on Mechanical and Biological Properties of Gyroid-Based Zn-2Mg Scaffolds for Bone Tissue Engineering. 孔隙梯度分布对Zn-2Mg基骨组织工程支架力学和生物学性能的影响

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184399

Shuxin Chen, Kai Liao, Youwen Yang, Huiming Chen, Renkai Huang

{"title":"Influence of Porosity Gradient Distribution on Mechanical and Biological Properties of Gyroid-Based Zn-2Mg Scaffolds for Bone Tissue Engineering.","authors":"Shuxin Chen, Kai Liao, Youwen Yang, Huiming Chen, Renkai Huang","doi":"10.3390/ma18184399","DOIUrl":"10.3390/ma18184399","url":null,"abstract":"To address the insufficient matching between high strength and low elastic modulus in traditional metal bone scaffolds and the issue of secondary surgical removal, this study used degradable zinc magnesium alloy as the material to study the relationship between porosity gradient distribution and mechanical and biological properties of Gyroid porous bone scaffolds. We established three groups of scaffolds with different porosity gradient distribution, including uniform, axial gradient, and radial gradient. Numerical simulation experiments were conducted for axial compression. The simulation results show that compared to uniform and axial gradients, radial gradient scaffolds have the highest Young's modulus and exhibit exceptional load-bearing capacity. The results of sample compression experiments show that under the same (average) porosity, the elastic modulus of uniform porous scaffolds and radial gradient porous scaffolds was not significantly different, but reverse radial gradient scaffolds exhibited superior yield strength relative to uniform porous scaffolds. Moreover, forward radial gradient scaffold extracts showed lower toxicity on the in vitro proliferation of mouse calvarial pre-osteoblast cells. By designing a forward radial gradient Gyroid porous bone scaffold, it is expected to obtain a biodegradable Zn-2Mg porous bone scaffold with excellent mechanical and biological properties.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471331/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176502","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

Mechanisms for Migration of Alkali in Dolomitic Limestones. 白云质灰岩中碱运移机理研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-21 DOI: 10.3390/ma18184404

Xinyu Zhang, Wei Li, Xiaojun Huang, Zhixin Wang, Min Deng

{"title":"Mechanisms for Migration of Alkali in Dolomitic Limestones.","authors":"Xinyu Zhang, Wei Li, Xiaojun Huang, Zhixin Wang, Min Deng","doi":"10.3390/ma18184404","DOIUrl":"10.3390/ma18184404","url":null,"abstract":"The alkali-dolomite reaction (ADR) describes the interaction between alkalis in concrete and dolomite which results in dedolomitization, leading to cracking and deterioration of the concrete. A large number of research has explored the chemical products associated with the ADR, mechanisms of expansion, and methods of identification, but our understanding of the occurrence and progression of the ADR chemical reaction is substantially limited. Key factors controlling the ADR chemical reaction are generally not understood. This paper investigates the migration process of alkali ions in dolomitic limestone and reaction process with dolomite crystals and alkali. Dolomitic limestone samples were selected for experimentation. The amount of Sodium (Na+) was measured as a means of assessing alkali ion migration. We measured the degree of dedolomitization using X-ray diffraction (XRD). Microstructure was evaluated using field emission scanning electron microscopy (FESEM). This research provides new insights into dedolomitization. The pore network provides the physical pathway for alkali ion migration. Concentration gradients drive the migration of alkali ions, and their interactions control the efficiency of alkali ion migration.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 18","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12471505/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176024","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