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A Review on Optimum Substrate Surface Roughness to Create Better Wetting 评述如何优化基底表面粗糙度以提高润湿效果
Pub Date : 2024-02-20 DOI: 10.12688/materialsopenres.17683.1
Chiranth H.S., Pavan Kumar H.R., Sachin Rathod, Karnam Manojkuma Y, Satyanarayan, Basavaraj Kusammanavar
Surface roughness or texture is one of the key parameters for liquid fluids or the liquid metals to achieve good or poor wetting. In certain applications surface roughness of smooth surface [mirror finish] is treated as slippery surface for poor wettability however in few applications’ roughness surfaces is considered as better wetting especially for liquid metals. In this regard, to understand the optimum surface roughness of the substrates to achieve good wetting is essential. In the present review paper, an attempt has been made to find the better roughness value of the substrate for better wetting of liquid metals or alloys based on substrates and fluids.
表面粗糙度或纹理是液态流体或液态金属实现良好或不良润湿的关键参数之一。在某些应用中,光滑表面(镜面抛光)的表面粗糙度被认为是湿润性差的滑面,但在少数应用中,粗糙表面被认为具有更好的湿润性,尤其是对液态金属而言。因此,了解基底的最佳表面粗糙度以实现良好润湿至关重要。在本综述论文中,我们尝试找出基底的最佳粗糙度值,以便在基底和流体的基础上更好地润湿液态金属或合金。
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引用次数: 0
Eco-friendly approaches of modern antifouling coating fabrication 现代防污涂料制造的生态友好型方法
Pub Date : 2024-02-20 DOI: 10.12688/materialsopenres.17630.1
Nikolaos D. Papadopoulos, P. Vourna
Biofouling presents significant technological, scientific, and economic obstacles to diverse maritime industries. Marine boats, pipelines, and offshore structures are susceptible to biofouling caused by the colonization of marine organisms, including macroalgae, clams, and shells. Due to the health risks and probable genetic abnormalities the usage of traditional antifouling coatings has been restricted or prohibited. Consequently, researchers have directed their efforts towards identifying environmentally benign alternatives to effectively mitigate fouling. This paper provides a concise overview of the recent progress made in the field of environmentally sustainable marine antifouling coatings and discusses limitations and perspectives.
生物污损在技术、科学和经济方面给不同的海洋产业带来了重大障碍。海船、管道和近海结构物很容易受到海洋生物(包括大型藻类、蛤蜊和贝壳)定植造成的生物污损的影响。由于存在健康风险和可能的基因异常,传统防污涂料的使用已被限制或禁止。因此,研究人员开始努力寻找对环境无害的替代品,以有效缓解污垢问题。本文简要概述了环境可持续海洋防污涂料领域的最新进展,并讨论了局限性和前景。
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引用次数: 0
Synthesis and optimization of ceria variants via sol-gel combustion method for environmental remediation 通过溶胶-凝胶燃烧法合成和优化用于环境修复的铈变体
Pub Date : 2024-01-09 DOI: 10.12688/materialsopenres.17634.1
Triparna Chakraborty, Dharmveer Yadav, Amita Bedar, Manoj Kumar Pandey, S. Saxena, S. Shukla
The study delves into the comprehensive exploration of ceria nanoparticle synthesis, explicitly focusing on distinct variants: fuel-rich, fuel-deficient, and stoichiometric proportions. These ceria variants are meticulously investigated using the sol-gel combustion method to uncover their unique characteristics. The exceptional performance of stoichiometric ceria is particularly notable, as it exhibits a well-defined crystal structure and balanced elemental composition. Conversely, fuel-deficient and fuel-rich ceria variants display altered lattice structures due to variations in their oxygen-to-cerium ratios. The study extends to the incorporation of these variants of ceria nanoparticles into PVDF polymeric membranes by flat sheet membrane synthesis for water application. The different ceria variant’s surface charges and electronic vacancies play a significant role in water purification and emulsion separation. Capitalizing on their individual properties, ceria-modified membranes are systematically evaluated, for membrane performance in terms of flux, recovery ratio and reusability. Stoichiometric ceria-incorporated membranes emerge as superior performers with 1.7x oil-water separation efficiency and reusability compared to pristine membranes. Therefore, ceria nanoparticle incorporated membrane can be used for sustainable environmental remediation of pollutants from the water.
该研究深入全面地探讨了铈纳米粒子的合成,明确侧重于不同的变体:富燃料、缺燃料和化学计量比例。采用溶胶-凝胶燃烧法对这些铈变体进行了细致的研究,以揭示它们的独特特性。化学计量铈的优异性能尤其引人注目,因为它具有明确的晶体结构和均衡的元素组成。相反,缺乏燃料和富含燃料的铈变体则因其氧铈比的变化而显示出不同的晶格结构。这项研究通过平板膜合成法,将这些变体的纳米铈颗粒加入到聚偏二氟乙烯(PVDF)聚合物膜中,用于水处理。不同铈变体的表面电荷和电子空位在水净化和乳液分离中发挥着重要作用。利用铈改性膜各自的特性,对其在通量、回收率和可重复使用性方面的性能进行了系统评估。与原始膜相比,化学合成铈掺杂膜的油水分离效率和可重复使用性是原始膜的 1.7 倍,表现出卓越的性能。因此,铈纳米粒子膜可用于水污染物的可持续环境修复。
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引用次数: 0
Establishing Interconnections and Predictive Modelling for CMT Cladding on 316L Stainless Steel 为 316L 不锈钢上的 CMT 包层建立互联和预测模型
Pub Date : 2023-12-15 DOI: 10.12688/materialsopenres.17617.1
Sachithananthan J, Raviram R, Mohandass M, Gurusamy V
Background Austenitic stainless-steel cladding is vital for corrosion resistance in industries such as petrochemicals, marine, and nuclear. Weld bead geometry and dilution, governed by process parameters, impact cladding quality. This study examines weld bead geometry with welding current, speed, and nozzle-to-plate distance, creating equations to predict dimensions and control geometry. Method This research explores Cold Metal Transfer (CMT) cladding, emphasizing its interaction with parameters using ANOVA and orthogonal arrays. It uncovers patterns and correlations, leading to a robust mathematical model derived from a Definitive Screen Design in Surface Methodology. Results Process parameter changes particularly affect internal shape (bead width, dilution, penetration area) compared to external shape (penetration, reinforcement) using mathematical model. And the validity of the model is defined. Penetration is primarily affected by welding current and nozzle-to-plate distance, with higher current and smaller distances leading to deeper penetration. Reinforcement is minimally impacted by welding current, speed, and error but decreases with a larger nozzle-to-plate distance. Bead width increases with higher welding current and larger nozzle-to-plate distances, while the effects of welding speed and error are relatively small. Dilution is reduced by higher welding current and larger distances, but error can significantly increase dilution. Welding speed has minimal impact on dilution. Conclusion This study enhances the understanding of CMT cladding. By analyzing parameter interactions, it predicts and controls weld dimensions. Statistical tools reveal patterns, aiding in a strong mathematical model. Significant for industrial applications, it emphasizes the impact of parameters on the quality and structure of cladding using austenitic stainless steel.
背景 奥氏体不锈钢堆焊对于石化、海洋和核能等行业的耐腐蚀性至关重要。由工艺参数决定的焊缝几何形状和稀释度会影响堆焊质量。本研究探讨了焊缝几何形状与焊接电流、速度和喷嘴到钢板距离的关系,并建立了预测尺寸和控制几何形状的方程式。方法 本研究采用方差分析和正交阵列法探讨冷金属转移 (CMT) 堆焊,强调其与参数之间的相互作用。它揭示了模式和相关性,并通过表面方法中的确定性筛选设计得出了一个稳健的数学模型。结果 利用数学模型,工艺参数的变化对内部形状(珠宽、稀释、穿透面积)和外部形状(穿透、加固)的影响尤为明显。并确定了模型的有效性。熔透主要受焊接电流和喷嘴到钢板距离的影响,电流越大、距离越小,熔透就越深。加强筋受焊接电流、速度和误差的影响很小,但随着喷嘴到钢板的距离增大而减小。焊缝宽度随焊接电流增大和喷嘴到钢板的距离增大而增加,而焊接速度和误差的影响相对较小。焊接电流越大、距离越远,稀释度越低,但误差会显著增加稀释度。焊接速度对稀释的影响很小。结论 本研究加深了对 CMT 堆焊的理解。通过分析参数之间的相互作用,它可以预测和控制焊接尺寸。统计工具揭示了模式,有助于建立强大的数学模型。它强调了参数对使用奥氏体不锈钢的堆焊质量和结构的影响,对工业应用具有重要意义。
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引用次数: 0
Electrospinning and nanofibre applications: fundamentals and recent status 静电纺丝和纳米纤维的应用:基本原理和最新状况
Pub Date : 2023-11-07 DOI: 10.12688/materialsopenres.17568.1
Archana Gadakh, Abhijeet Kulkarni
A field that is constantly growing is the bio fabrication of biomimetic materials for tissue engineering applications. Particularly intriguing are the mechanical and structural features that nano fibrous scales can emulate (e.g., collagen fibres). This review provides a broad overview of the production of nanofibers with a focus on the creation and use of electrospun nano fibrous scaffolds. Electrospinning allows for the creation of mats with precise fibre arrangements and structural integrity using a variety of biodegradable biopolymers. This review also lists some production process benefits and drawbacks. Also, the characteristics of the nanofibers that can be created using each process are illustrated together with the electrospinning techniques for producing nanofibers.
一个不断发展的领域是用于组织工程应用的仿生材料的生物制造。特别有趣的是纳米纤维鳞片可以模拟的机械和结构特征(例如,胶原纤维)。本文综述了纳米纤维的生产,重点介绍了静电纺纳米纤维支架的制造和使用。静电纺丝允许使用各种可生物降解的生物聚合物制造具有精确纤维排列和结构完整性的垫子。本文还列举了一些生产工艺的优点和缺点。此外,还说明了使用每种工艺所制备的纳米纤维的特性以及用于生产纳米纤维的静电纺丝技术。
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引用次数: 0
Machine learning guided prediction of the yield strength and hardness of multi-principal element alloys
Pub Date : 2023-10-09 DOI: 10.12688/materialsopenres.17476.1
Mohammad Fuad Nur Taufique, Osman Mamun, Ankit Roy, Hrishabh Khakurel, Ganesh Balasubramanian, Gaoyuan Ouyang, Jun Cui, Duane D. Johnson, Ram Devanathan
Background: Multi-Principal Element Alloys (MPEAs) have better properties, such as yield strength, hardness, and corrosion resistance compared to conventional alloys. Compositional optimization is a challenging task to obtain desired properties of MPEAs and machine learning is a potential tool to rapidly accelerate the search and design of new materials. Methods: We have implemented different machine learning models to predict the yield strength and Vickers hardness of MPEAs at room temperature and quantify the uncertainty of the predictions. Results: Our results suggest that valence electron concentration (VEC) is the key feature dominating the yield strength and hardness of MPEAs. Our predicted yield strength and hardness values for the experimental validation set show < 15 % error for most cases with respect to the experimental values. Conclusions: Our machine learning model can serve as a useful tool to screen half a trillion MPEAs and down select promising compositions for useful applications.
背景:与传统合金相比,多主元素合金具有更好的性能,如屈服强度、硬度和耐腐蚀性。为了获得理想的mpea性能,组分优化是一项具有挑战性的任务,而机器学习是快速加速新材料搜索和设计的潜在工具。方法:我们实现了不同的机器学习模型来预测mpea在室温下的屈服强度和维氏硬度,并量化预测的不确定性。结果:价电子浓度(VEC)是决定mpea屈服强度和硬度的关键因素。我们对实验验证集的屈服强度和硬度预测值显示<大多数情况下与实验值有15%的误差。结论:我们的机器学习模型可以作为一个有用的工具来筛选5000亿个mpea,并为有用的应用选择有前途的组合物。
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引用次数: 0
Early age strength of ambient-cured geopolymer mortars from waste concrete and bricks with different alkaline activators. 不同碱性活化剂对废混凝土和废砖环境固化地聚合物砂浆早期强度的影响。
Pub Date : 2023-08-31 DOI: 10.12688/materialsopenres.17592.1
R. Kogbara, Abdelrahman Al-Zubi, E. Masad
Background: The dataset in this work emanates from preliminary studies comparing early-age compressive strengths of geopolymer mortars produced from construction and demolition wastes (CDW) commonly found in Qatar using different alkaline activators.  Methods: Waste concrete, waste bricks and steel slag - an industrial waste produced in large quantities in the country - were used as aluminosilicate sources. Waste concrete was used as fine aggregate (75 μm to 4 mm), while solid or hollow red clay bricks were used together with steel slag as aluminosilicate powders. Solid red clay brick (75 μm to 1.4 mm) was also used as fine aggregate in some mixes. Different alkaline activators including solid powder or ground pellet forms of Ca(OH)2, CaO, and Ca(OH)2-NaOH, NaOH-CaCO3 and Na2SiO3-Na2CO3-Ca(OH)2 mixtures were employed by just adding water. A few mixes included both solid powder Ca(OH)2 and viscous solutions of NaOH and NaOH-Na2SiO3 as alkaline activators. The geopolymer mortars also included small amounts of some other additives such as gypsum, microsilica and aluminium sulfate to enhance the geopolymerization and hydration process. Random proportions of the materials were considered in the range-finding experiments, and the mortars produced were tested for compressive strength. Results: The data show the 7-day compressive strengths and densities of the 40 mixtures considered with mostly ambient temperature (20°C) curing. It also shows such data for mixtures in which variables such as curing at 40°C, mixing with hot water at 50 - 60°C temperature, grading of waste concrete aggregates, and collective grinding of the powdered materials were considered. Conclusions: The dataset shows possible early-age compressive strengths of different geopolymer mortar mixture designs and the materials and mixture design methods that can be used to achieve desired early-age strengths from waste concrete and bricks.
背景:这项工作中的数据集来源于对卡塔尔常见的使用不同碱性活化剂的建筑和拆除废物(CDW)生产的地质聚合物砂浆的早期抗压强度进行比较的初步研究。方法:利用废弃混凝土、废弃砖块和钢渣——一种在该国大量产生的工业废物——作为铝硅酸盐来源。废弃混凝土用作细骨料(75μm至4 mm),而实心或空心红粘土砖与钢渣一起用作铝硅酸盐粉末。固体红粘土砖(75μm至1.4 mm)也用作某些混合料中的细骨料。通过仅加水使用不同的碱性活化剂,包括Ca(OH)2、CaO和Ca(OH)2-NaOH、NaOH-CaCO3和Na2SiO3-Na2CO3-Ca(OH)2-混合物的固体粉末或研磨颗粒形式。一些混合物包括固体粉末Ca(OH)2和作为碱性活化剂的NaOH和NaOH-Na2SiO3的粘性溶液。地质聚合物砂浆还包括少量其他添加剂,如石膏、二氧化硅和硫酸铝,以增强地质聚合物化和水化过程。测距实验中考虑了材料的随机比例,并对生产的砂浆进行了抗压强度测试。结果:数据显示了40种混合物的7天抗压强度和密度,主要考虑环境温度(20°C)固化。它还显示了混合物的此类数据,其中考虑了40°C下的养护、50-60°C下与热水混合、废弃混凝土骨料的分级和粉末材料的集体研磨等变量。结论:数据集显示了不同地质聚合物砂浆混合物设计的可能早期抗压强度,以及可用于从废弃混凝土和砖块中获得所需早期强度的材料和混合物设计方法。
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引用次数: 0
Influence of input parameters to determine the shape of weld bead in cladding on 316L stainless steel using the Taguchi method 输入参数对用田口法确定316L不锈钢熔覆焊缝形状的影响
Pub Date : 2023-08-30 DOI: 10.12688/materialsopenres.17569.1
Raviram R, Sachithananthan J, Mohandass M, Gurusamy V
Background:  The Cold Metal Transfer (CMT) process, with its low heat input, is selected for cladding carbon steel in demanding industries such as mining, oil, gas, offshore, steel, and metal. Limited research exists on the utilization of Taguchi's technique in welding and cladding processes. The main objective of the present research is to employ the Taguchi approach for determining the impact of CMT parameters on the cladding geometry of 316L stainless steel. Methods: The influence of process parameters on the weld bead was examined using both Signal-to-Noise (S/N) ratio and Analysis of Variance (ANOVA) by implementing an orthogonal array. A structural steel substrate was coated with nickel-based metal inert gas (MIG) welding wire using the CMT process while being shielded by a 99.9 percent pure argon gas. To attain the desired quality of weld bead, the CMT input parameters and geometry of the bead are separately and collectively optimized. Results: When the welding current (Iw) is set at 130A, welding speed (V) at 200 mm/min, and the distance between the nozzle and plate (X) at 5 mm, the Taguchi method indicates that the desired outcome is obtained with the following parameters: a penetration (P) of 1.115 mm, a reinforcement (R) of 1.51 mm, a bead width (W) of 4.265 mm, and a percentage of dilution (D) of 21.145%. Conclusions: The research findings indicate, under certain limitations, the techniques of the Taguchi method be utilized to efficiently manage the CMT cladding process parameters.
背景:在采矿、石油、天然气、海上、钢铁和金属等要求苛刻的行业中,选择热输入低的冷金属转移(CMT)工艺来包覆碳钢。关于田口技术在焊接和覆层工艺中的应用研究有限。本研究的主要目的是采用田口方法来确定CMT参数对316L不锈钢覆层几何形状的影响。方法:采用信噪比(S/N)和方差分析(ANOVA)两种方法,通过实施正交阵列,研究工艺参数对焊缝的影响。使用CMT工艺用镍基金属惰性气体(MIG)焊丝涂覆结构钢基底,同时用99.9%纯氩气进行保护。为了获得所需的焊道质量,CMT输入参数和焊道的几何形状被单独地和集体地优化。结果:当焊接电流(Iw)设置为130A,焊接速度(V)设置为200mm/min,喷嘴和板之间的距离(X)设置为5mm时,田口方法表明,通过以下参数获得了期望的结果:熔深(P)为1.115mm,补强(R)为1.51mm,焊道宽度(W)为4.265mm,和21.145%的稀释百分比(D)。结论:研究结果表明,在一定的限制下,田口方法的技术可以有效地管理CMT包壳工艺参数。
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引用次数: 0
Equation of states at extreme compression ranges: Pressure and Bulk modulus as an example 极限压缩范围的状态方程:以压力和体积模量为例
Pub Date : 2023-08-25 DOI: 10.1142/s2811086223500073
Shivam Srivastava, Prachi Singh, A. Pandey, C. K. Dixit, K. Pandey, Shipra Tripathi
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引用次数: 3
Multifunctional Properties of Ocimumsanctum Linn Leaves Mediated Synthesis of Nanoceria 紫花苜蓿叶片介导纳米粒合成的多功能特性研究
Pub Date : 2023-08-11 DOI: 10.1142/s2811086223500061
R. Munirathnam, Y. Vidya, H. C. Manjunatha, S. Manjunatha, K. Sridhar, L. Seenappa, S. Veera Rethina Murugan, V. Thirunavukkarasu, G. Pavithra, B. Sadashivamurthy
{"title":"Multifunctional Properties of Ocimumsanctum Linn Leaves Mediated Synthesis of Nanoceria","authors":"R. Munirathnam, Y. Vidya, H. C. Manjunatha, S. Manjunatha, K. Sridhar, L. Seenappa, S. Veera Rethina Murugan, V. Thirunavukkarasu, G. Pavithra, B. Sadashivamurthy","doi":"10.1142/s2811086223500061","DOIUrl":"https://doi.org/10.1142/s2811086223500061","url":null,"abstract":"","PeriodicalId":29806,"journal":{"name":"Materials Open Research","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81560357","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}
引用次数: 0
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