Results in Materials最新文献

{"title":"Effect of curing procedure on mechanical properties and pore structure characteristics of three different concrete types","authors":"Dina A. Emarah,&nbsp;Mostafa A. Mostafa,&nbsp;M. Anwar","doi":"10.1016/j.rinma.2025.100732","DOIUrl":"10.1016/j.rinma.2025.100732","url":null,"abstract":"<div><div>This study investigates the influence of curing methods on the mechanical properties and pore structure characteristics of concretes including Sulphate-Resisting Cement (SRC), Ordinary Portland Cement (OPC), and Blast-Furnace Slag Cement (BFSC). Two curing regimes were applied: water immersion (Method I) and controlled humidity (Method II) at 22 °C and 80 % RH, with twice-daily water sprinkled for 7 days. Concrete mixtures with a 0.4 water-to-cement ratio and 400 kg/m³ cement content were assessed in terms of fresh properties, including slump, air content, and unit weight. The hardened properties were evaluated through compressive, flexural, and tensile strength tests, in addition to pulse velocity and dynamic elastic modulus measurements. To examine the impact of curing conditions on porosity, Mercury Intrusion Porosimetry (MIP) was used to quantify cumulative intrusion volume, porosity, pore surface area, and average pore diameter. Unlike previous studies that primarily focus on compressive strength, this research uniquely investigates mechanical performance with pore structure variations induced by curing conditions, filling a critical gap in the existing literature. The findings confirm that Method I significantly improves mechanical properties, particularly for SRC, which achieved the highest compressive strength of 741 kg/cm² at 180 days. OPC exhibited the highest flexural strength (86.0 kg/cm² at 28 days), whereas SRC outperformed in tensile strength under Method I. MIP analysis revealed that water immersion curing reduced the average pore diameter of SRC to 0.0266 μm, resulting in denser concrete, making it ideal for aggressive Sulphate-rich and chloride-laden environments. The study further validates nondestructive testing methods, as pulse velocity and dynamic elastic modulus correlated well with compressive strength results, reinforcing their reliability in assessing concrete quality without destructive testing. Additionally, this research provides a practical comparison between standard curing and field-applicable curing methods, addressing real-world construction constraints where continuous water immersion is often impractical. These findings contribute to global research by offering practical insights into curing efficiency, particularly for Sulphate-resistant and blended cementitious systems. Future research should explore extended durability assessments beyond 180 days, alternative curing techniques, and machine learning-based predictive modeling to enhance curing optimization for high-performance concrete in harsh environmental conditions.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"27 ","pages":"Article 100732"},"PeriodicalIF":0.0,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"General prediction of transport and thermodynamic properties of deep eutectic solvents based on choline chloride using machine learning","authors":"Farshid Zargari,&nbsp;Alireza Nowroozi","doi":"10.1016/j.rinma.2025.100730","DOIUrl":"10.1016/j.rinma.2025.100730","url":null,"abstract":"<div><div>This study delves into the potential of machine learning (ML) to predict the properties of choline chloride-based deep eutectic solvents (DESs), focusing on density, viscosity, and ionic conductivity. Utilizing a dataset derived from an extensive review of scientific literature, we applied a variety of ML models, including tree-based algorithms and neural networks, to establish correlations between DES features and their physical properties. Our findings demonstrate that models like Random Forest, XGBoost, LightGBM, and Stacked Models excel in predictive accuracy, particularly for density and viscosity, as evidenced by high R2 and Pearson correlation values. Our exploration into ionic conductivity revealed that despite initial assumptions, the size of the dataset did not limit the predictive capability. Learning curve analysis illustrated that models like LightGBM performed consistently well across varying dataset sizes, maintaining accuracy in their predictions. Notably, the Stacked Models emerged as the most effective, suggesting the benefit of combining different ML approaches for such predictions. The study also employed SHAP analysis to discern the impact of specific molecular features on the predictive outcomes, providing deeper insights into DES behavior. In essence, our results confirm that ML can be a powerful tool in the predictive modeling of DES properties, which has significant implications for the design and optimization of these solvents in various industrial applications.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"27 ","pages":"Article 100730"},"PeriodicalIF":0.0,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructure, phase composition, and oxidation resistance of alloys of Nb-Ti-Al system produced by electron beam melting and zone melting","authors":"Iryna Trosnikova ,&nbsp;Anatolii Minitskyi ,&nbsp;Ievgen Byba ,&nbsp;Dmytro Vedel ,&nbsp;Мaksym Barabash","doi":"10.1016/j.rinma.2025.100729","DOIUrl":"10.1016/j.rinma.2025.100729","url":null,"abstract":"<div><div>Titanium aluminides and alloys based on them are promising heat-resistant materials. These alloys are promising for using in equipment working under severe conditions, in particular in aircraft construction, mechanical engineering and space technology. The main techniques of providing the necessary complex of mechanical properties of intermetallic alloys are electron beam melting or zone melting. The work demonstrates that ternary alloys of the Nb-Ti-Al system can be used to optimize the parameters of electron beam melting and zone melting to provide enhanced properties of titanium alloys. The heat resistance of alloys based on the Nb-Ti-Al system is determined. The oxidation behavior of these alloys during high-temperature annealing at 1200^оС for 120 min is studied.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"27 ","pages":"Article 100729"},"PeriodicalIF":0.0,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of 3D printing parameters for carbon fiber reinforced polymer (CFRP) material: Impact and hardness analysis using Taguchi method","authors":"Wahyu Dwi Lestari ,&nbsp;Abdi Satryo Mukti ,&nbsp;Ndaru Adyono ,&nbsp;I Gede Susrama Mas Diyasa ,&nbsp;Ni Ketut Sari ,&nbsp;Wahyu Caesarendra ,&nbsp;Chatarina Sari ,&nbsp;Nur Rachmat ,&nbsp;Iwan Budiwan","doi":"10.1016/j.rinma.2025.100727","DOIUrl":"10.1016/j.rinma.2025.100727","url":null,"abstract":"<div><div>Carbon fiber-reinforced polymers (CFRP) have gained significant attention due to their excellent mechanical properties. However, optimizing 3D printing parameters remains a challenge in achieving enhanced material performance. In this study, a commercial CFRP filament with a polymeric matrix composed of polylactic acid (PLA) was used. The main objective was to analyze the impact strength and hardness of printed samples using the Taguchi method. The factors utilized were nozzle temperature, infill density, printing speed, layer thickness, infill pattern, and orientation. Confirmation tests were conducted to confirm the optimal parameter setting by comparing the experimental result with calculated values. The confirmation test validated that the optimal parameters yielded a Shore D hardness value of 74.8132 and impact strength of 1.261 J. ANOVA results indicated that the layer thickness (38.23 %) and infill density (25.01 %) significantly affected the hardness, whereas infill density (65.57 %) and layer thickness (18.31 %) were the predominant factors affecting impact strength. The findings confirm that Taguchi technique effectively optimizes 3D printing parameters of CFRP materials for improved mechanical properties and manufacturing efficiency. Future research should be directed towards hybrid post-processing techniques, fatigue and wear resistance tests, internal structure optimization, and environmental tests for further performance improvement of CFRP in industries.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"27 ","pages":"Article 100727"},"PeriodicalIF":0.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study the effect of processing parameters on friction stir welding of AA5083 aluminum alloy reinforced with Al-SiC matrix","authors":"Noha M. abdeltawab ,&nbsp;Mohamed Elshazly ,&nbsp;Ahmed Y. Shash ,&nbsp;M. El-Sherbiny","doi":"10.1016/j.rinma.2025.100731","DOIUrl":"10.1016/j.rinma.2025.100731","url":null,"abstract":"<div><div>Improving the friction stir welding of AA5083 has been documented in recent applications in corrosive mediums like shipbuilding and chemical storage vessels. This article studies the effect of reinforcing the AA5083 friction stir welding joint with aluminum-silicon carbide matrix particles synthesized by ball milling with different silicon carbide weight ratios. As well as the effect of welding process parameters (transverse speed and rotational speed) on the tensile strength, hardness, and corrosion properties of the reinforced joint was investigated. Results show that as the silicon carbide weight ratio in the reinforcement matrix increases the joint strength and corrosion resistance increase, while corrosion weight loss decreases with an increase in transverse speed. Microstructure and hardness investigation show that the rotational speed of 800 rpm was the most efficient in mixing reinforcement in the joint so it has the higher strength and lower corrosion weight loss at fixing the other parameters, it shows also the transverse speed of 40 mm/min give the welding the adequate amount of heat input to maintain the interconnection between grains that have the highest strength in fixing the other parameters.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"27 ","pages":"Article 100731"},"PeriodicalIF":0.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile preparation of nickel phosphide/multi-walled carbon nanotube films for high-performance Li–O2 batteries","authors":"Younggwon Cho,&nbsp;Kichang Hong,&nbsp;Inhan Kang,&nbsp;Jungwon Kang","doi":"10.1016/j.rinma.2025.100726","DOIUrl":"10.1016/j.rinma.2025.100726","url":null,"abstract":"<div><div>Lithium–air batteries have been attracting attention as post energy storage systems in the last 10 years due to the advantage of having 10 times higher energy density than lithium–ion batteries. Developing proper catalysts is one of the major current challenge to overcome their high overpotential and long life cycle span. Here, we demonstrated facile preparation of Ni₂P/multi-walled carbon nanotube (MWCNT) films through vacuum filration. The free-standing flims shows that Ni₂P particles well bounded within the MWCNT framework without any deformation, confirmed by scanning electron microscopy (SEM) images and X-ray diffraction (XRD) patterns. The Li–O₂ cell employing Nickel Phosphide/MWCNT films as a cathode material shows and initial ∼6 % increase in energy efficiency and a subsequent 10 cycle retention.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"26 ","pages":"Article 100726"},"PeriodicalIF":0.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of tobermorite 11 Å during the formation of autoclaved aerated concrete with the addition of diatomite","authors":"I. Alejandra Corro-Escorcia ,&nbsp;Juan Hernández-Ávila ,&nbsp;Eduardo Cerecedo-Sáenz ,&nbsp;F.R. Barrientos-Hernández ,&nbsp;Montserrat Cruz-Hernández ,&nbsp;Norman Toro ,&nbsp;Edelmira Gálvez ,&nbsp;M.P. Gutiérrez-Amador ,&nbsp;Eleazar Salinas-Rodríguez","doi":"10.1016/j.rinma.2025.100725","DOIUrl":"10.1016/j.rinma.2025.100725","url":null,"abstract":"<div><div>The fundamental structure of an autoclaved aerated concrete, is closely linked with the formation of tobermorite, which is called the heart of concrete and directly affects its mechanical properties. However the presence of only tobermorite 11 Å (instead that of 9 or 14 Å), is more desirable. For this reason, it is important to study what are the conditions during the synthesis of concrete, that can favor the formation of this phase. In this paper, the effect of natural diatomite addition in conjunction with the evaluation of two different calcium-silicon oxides ratio during the synthesis of an autoclaved aerated concrete, were studied. The main objective was to promote the tobermorite 11 Å formation, which can improve the compressive strength of that concrete. The synthesis was carried out testing two CaO/SiO₂ ratios (0.5 and 0.8) with different percentages of diatomite (0, 0.5, 0.10, 0.15, 0.20 and 0.25 %). It was found that with an oxide ratio of 0.5 and 0.15 % of diatomite, the presence of tobermorite 9 Å increased from 29 to 33 % and the concrete reached a maximum value compressive strength of 4.66 MPa. On the other hand, for an oxide ratio of 0.8 and 0.20 % of diatomite, it was found the presence of only tobermorite 11 Å (which corresponds to 38 %), getting so a maximum value of 4.73 MPa. In both previous cases, it was found an increase of 16.5 and 18.25 % respectively, in comparison with the 4 MPa necessary for this type of materials, to be considered for structural applications. According to the above, the oxide ratio of 0.8, in conjunction with addition of diatomite, can promote the formation of tobermorite 11 Å mainly, which also improved the compressive strength values.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"26 ","pages":"Article 100725"},"PeriodicalIF":0.0,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the correlation between sand particle size and ultrasonic properties of mortar: A comprehensive analysis using ultrasonic techniques","authors":"Hicham Mesbah ,&nbsp;Hicham Lotfi ,&nbsp;Mounir Tafkirte ,&nbsp;Hicham Banouni ,&nbsp;Mohamed Ettahiri ,&nbsp;Bouazza Faiz","doi":"10.1016/j.rinma.2025.100717","DOIUrl":"10.1016/j.rinma.2025.100717","url":null,"abstract":"<div><div>The accurate characterization of construction materials is crucial for ensuring their durability and performance in the construction industry. This study focuses on the non-destructive characterization of mortar using ultrasonic techniques to investigate the impact of sand grain size on ultrasonic properties. Using 1 MHz transducers, we observed significant non-linear variations in ultrasonic velocity, with a decrease to 3100 m/s at a particle size of 0.3 mm, followed by an increase to 3700 m/s as the grain size approached 0.7 mm. These results demonstrate a strong correlation between sand grain size and the ultrasonic properties of mortar, highlighting the influence of particle size on parameters such as transmission coefficient and acoustic impedance. By selecting appropriate sand grain sizes, the risk of cracking and degradation in mortar can be minimized, leading to improved durability and structural integrity. This study contributes actionable insights for optimizing mortar compositions, paving the way for enhanced construction materials.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"26 ","pages":"Article 100717"},"PeriodicalIF":0.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determining the quality of imprinted polymers using diverse feature selections methods, Ada Boost and Gradient boosting algorithms","authors":"Bita Yarahmadi ,&nbsp;Seyed Majid Hashemianzadeh","doi":"10.1016/j.rinma.2025.100722","DOIUrl":"10.1016/j.rinma.2025.100722","url":null,"abstract":"<div><div>The use of polymer informatics is an appropriate solution to overcome the problems of optimizing the synthesis conditions of polymers, which has attracted the attention of many researchers. The aim of this study is to develop a comprehensive model to predict the imprinting factor (IF) value for different template molecules. Therefore, molecularly imprinted polymers (MIPs) were synthesized for various template molecules, their IF values were calculated, and then a data set table was prepared. By utilizing the Ada Boost algorithm, Gradient boosting algorithm and various feature selection methods such as forward selection, mutual information, correlation statistics, chi-square and Recursive Feature Elimination (RFE), an accurate model was created to predict IF. The results showed that using the Ada Boost algorithm and the RFE feature selection method, improved modeling accuracy achieving a maximum R² score (R² = 0.937, Adjusted R² = 0.936) and minimum errors (MAE = 0.915, MSE = 7.052). The accuracy of the models obtained using the gradient boosting algorithm was lower compared to the Ada Boost algorithm, and the maximum accuracy of the model was obtained using the mutual information method. This paper provides specific quantitative insights into how each feature selection method affected prediction performance, supported by relevant metrics.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"27 ","pages":"Article 100722"},"PeriodicalIF":0.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterizations of nickel-rich NMC lithium-ion battery cathode with varying transition metal ratios synthesized via hydroxide co-precipitation","authors":"Handi Muhtadi ,&nbsp;S. Suwarno ,&nbsp;Achmad Subhan","doi":"10.1016/j.rinma.2025.100724","DOIUrl":"10.1016/j.rinma.2025.100724","url":null,"abstract":"<div><div>Cobalt content in Li-ion battery cathodes has become a major concern due to its price volatility and the limited availability of sources. Low-cobalt, Ni-rich active materials are promising candidates for next-generation cathodes because of their high capacities, and many proposed processing methods for these materials can further reduce both cost and environmental impact. However, the resulting lattice changes can lead to structural degradation and capacity fading. In this study, we report the effects of cobalt content on the crystal structure and morphology of nickel-rich Li[NixCoyMnz]O₂ (where x ≥ 0.8; x + y + z = 1) cathode materials synthesized using the hydroxide-route co-precipitation method. The synthesized cathodes were characterized through Particle Size Distribution (PSD), scanning electron microscope-energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD). Their electrochemical properties were examined using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry. Results indicate that slight variations in cobalt content did affect the synthesized cathode slightly, highlighting the potential for low-cobalt electrodes.</div></div>","PeriodicalId":101087,"journal":{"name":"Results in Materials","volume":"26 ","pages":"Article 100724"},"PeriodicalIF":0.0,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}