Advances in Materials Science最新文献_第5页

Electrical Characteristics of Dry Cement – Based Composites Modified with Coconut Husk Ash Nanomaterial 椰壳灰纳米改性干水泥基复合材料的电学特性

IF 1.3

Advances in Materials Science Pub Date : 2022-06-01 DOI: 10.2478/adms-2022-0008

U. Robert, S. Etuk, S. Ekong, O. Agbasi, Nsikak Ekpenyong, Samuel Sunday Akpan, Eme Aniefiok Umana

{"title":"Electrical Characteristics of Dry Cement – Based Composites Modified with Coconut Husk Ash Nanomaterial","authors":"U. Robert, S. Etuk, S. Ekong, O. Agbasi, Nsikak Ekpenyong, Samuel Sunday Akpan, Eme Aniefiok Umana","doi":"10.2478/adms-2022-0008","DOIUrl":"https://doi.org/10.2478/adms-2022-0008","url":null,"abstract":"Abstract Coconut husk is generated yearly as waste in large quantities but majorly under-utilized. Also, as a result of high embodied carbon, cement production is one of the largest contributors to construction sector carbon footprint. Since accumulation of unmanaged agro-waste like coconut husk has an increased environmental concern due to its pollution effect, recycling it into sustainable construction materials is a viable solution for future generation. In this study, experiments were performed to investigate the influence of coconut husk ash nanomaterial (CHAN) inclusion on electrical characteristics of plain cement paste (BCP) and mortar (CSM) samples at curing ages of 7 and 28 days. The results showed increase in electrical resistivity, thermal constant, and activation energy with curing duration for heating and cooling cycles of BCP and CSM. With inclusion of CHAN, the developed cement paste (CAP) and mortar (CASM) possessed lower values in all cases compared to their counterparts. Also, during heating at 28 days, both the CAP and CASM exhibited decrease in thermal constant. Though electrical resistance of all the samples varied inversely with temperature, CAP and CASM were found to possess greater potentials to make building structures intrinsically smart. Hence, in addition to solving disposal problems, utilization of coconut husks as described herein could enhance development of safe, inexpensive, and sustainable buildings that have large temperature sensing volume.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87153946","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: 1

Effect of Shop-Primer Coating on S235JR Steel on MAG Weldability S235JR钢车间底漆涂层对MAG可焊性的影响

IF 1.3

Advances in Materials Science Pub Date : 2022-06-01 DOI: 10.2478/adms-2022-0007

Cemil Çetinkaya, Ali Akay, U. Arabaci, U. Özdemir

{"title":"Effect of Shop-Primer Coating on S235JR Steel on MAG Weldability","authors":"Cemil Çetinkaya, Ali Akay, U. Arabaci, U. Özdemir","doi":"10.2478/adms-2022-0007","DOIUrl":"https://doi.org/10.2478/adms-2022-0007","url":null,"abstract":"Abstract In this study, S235JR structural steel samples in uncoated condition and coated (shop-primer) in different thicknesses were welded by MAG (Metal Active Gas) welding method, and the effects of these applications on the mechanical and microstructure properties of the material were investigated. In the experimental studies, the first specimen group were used without any sandblasting and coating application, the second group specimens were sandblasted at Sa 2 ½ degree, and 25 µm, 50 µm, and 75 µm coatings were applied to the specimens in the other group. Surface conditions and coating thicknesses were selected as the variable parameters. With the examination of the radiography films, it was observed that the surface conditions affected the welded joint. As a result of the study, it was observed that altered coating thicknesses caused defects in the welding zone. It was determined that the coating thickness partially affected the mechanical properties, and the highest hardness values occurred in the weld zone in all samples. Relatively low values were obtained in tensile, bending and Charpy impact tests performed on sample groups with 75 µm coating thickness. The results were verified by the surface fracture, SEM, and EDS studies.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80130302","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: 3

Corrosion of Transparent Electrodes Study 透明电极的腐蚀研究

IF 1.3

Advances in Materials Science Pub Date : 2022-06-01 DOI: 10.2478/adms-2022-0005

A. Maged, L. A. M. Nada

引用次数: 1

Effects of B Addition on the Microstructure and Microhardness of Melt-Spun Al-7075 Alloy 添加B对Al-7075熔纺合金组织和显微硬度的影响

IF 1.3

Advances in Materials Science Pub Date : 2022-06-01 DOI: 10.2478/adms-2022-0004

M. F. Kılıçaslan, Saad Ibrahim Elburni, Yasin Yilmaz, M. Akkaş

引用次数: 1

Rubber Influence on the Performance of Thermal Insulating Quarry Sand Mortars-A Statistical Analysis 橡胶对采石砂保温砂浆性能影响的统计分析

IF 1.3

Advances in Materials Science Pub Date : 2022-03-01 DOI: 10.2478/adms-2022-0002

Smain Benyamina, Y. Abadou

{"title":"Rubber Influence on the Performance of Thermal Insulating Quarry Sand Mortars-A Statistical Analysis","authors":"Smain Benyamina, Y. Abadou","doi":"10.2478/adms-2022-0002","DOIUrl":"https://doi.org/10.2478/adms-2022-0002","url":null,"abstract":"Abstract The purpose of this paper is to develop a framework for managing wastes resulting from the tire rubber valorization waste of quarry sand mortar. A research methodology was developed to achieve the abovementioned main objective. To create a framework for use of crumb rubber in the production of quarry sand mortars, with adequate physical and mechanical properties to be used in a variety of construction applications. Testing included strength and thermal conductivity properties of the various mixture composition subjected to varying by 5%. 10%. 15% and 20% by quarry sand substitution. The internal microstructure, and phase composition of all mixture mortars, were investigated using scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDS). The results show that increasing incorporation rate of additives significantly improves thermophysical properties of based materials, the hardened properties of the various mortars made are analyzed and compared, the experimental results revealed that; the addition of crumb rubber waste in the quarry sand mortar is beneficial for physical properties (Mv) mass loss, The results of mechanics strength of the rubber based quarry mortar studied are also significantly reduced.The addition of 5% to 20% rubber crumb in matrix and the replacement of sand by 20% of rubber in quarry mortar record the low thermal conductivity properties including that appropriate QS and CR levels may change the pattern of quarry sand mortar. witch explain by a Larger pore and higher porosity produce a less rigid and uniform matrix, meaning that the sonic pulses must travel through longer and more miscellaneous paths which improvement of insulation. The good performance of new materials encourages us to integrate them into the building envelope.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73192996","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: 1

Mathematical Model for Friction Stir Lap Welded AA5052 and SS304 Joints and Process Parameters Optimization for High Joint Strength AA5052与SS304搅拌摩擦搭接接头数学模型及高强度接头工艺参数优化

IF 1.3

Advances in Materials Science Pub Date : 2022-03-01 DOI: 10.2478/adms-2022-0001

Veerendra Chitturi, S. R. Pedapati, M. Awang

{"title":"Mathematical Model for Friction Stir Lap Welded AA5052 and SS304 Joints and Process Parameters Optimization for High Joint Strength","authors":"Veerendra Chitturi, S. R. Pedapati, M. Awang","doi":"10.2478/adms-2022-0001","DOIUrl":"https://doi.org/10.2478/adms-2022-0001","url":null,"abstract":"Abstract Due to the numerous challenges faced during the dissimilar welding, choosing the right process parameters and their optimization yields better results. In this context, the current investigation is focused on the optimization of process parameters. Taguchi’s L9 orthogonal array was selected to carry out the experimental investigations. The welded samples were tested for shear strength, and the results were analysed using Taguchi’s S/N ratio analysis with “larger the better” criteria. Log-linear regression analysis was applied to formulate an empirical correlation between the process parameters and shear strength. According to S/N ratio analysis, the tool rotational speed of 800 rpm, welding speed of 20 mm/min and a penetration depth of 4.1 mm are the optimized parameters that achieve high joint strength. The achieved joint strength was 3.46 kN that is 70% of the base aluminium metal. It was noticed from the Analysis of variance of the regression model that penetration depth and tool rotational speed are the significant contributors with p-values less than 0.5. Confirmation tests show that the error between the predicted and calculated shear strength is 2.06% which is considered acceptable. R2 and adjusted R2 values of the model with a standard error of 0.076 show that the developed model is statistically significant.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85643057","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: 3

NiO/CuO/TiO2 Ternary Composites: Development, Physicochemical Characterization and Photocatalytic Degradation Study Over Reactive Orange 30 Solutions Under Solar Light Irradiation NiO/CuO/TiO2三元复合材料的制备、物理化学表征及太阳光照下活性橙30溶液的光催化降解研究

IF 1.3

Advances in Materials Science Pub Date : 2022-03-01 DOI: 10.2478/adms-2022-0003

A. Muthamilarasu, S. Sivakumar, G. Divya, M. Sivakumar, D. Sakthi

{"title":"NiO/CuO/TiO2 Ternary Composites: Development, Physicochemical Characterization and Photocatalytic Degradation Study Over Reactive Orange 30 Solutions Under Solar Light Irradiation","authors":"A. Muthamilarasu, S. Sivakumar, G. Divya, M. Sivakumar, D. Sakthi","doi":"10.2478/adms-2022-0003","DOIUrl":"https://doi.org/10.2478/adms-2022-0003","url":null,"abstract":"Abstract The photocatalytic degradation and mineralization of Reactive Orange 30 on NiO/CuO/TiO2 ternary composites have been studied using solar light irradiation. The NiO/CuO/TiO2 ternary composites were prepared by producing ethanolic dispersions containing varied amounts of NiO and CuO/TiO2 (3wt% to 15wt.%), followed by annealing at 300 °C. SEM, UV- Vis DRS, PL, XRD and FTIR analysis have been used to characterize the unary (parent photocatalysts), binary and ternary composites. Under solar light irradiation, NiO/CuO/TiO2 ternary composites exhibited an excellent photocatalytic activity in degradation of reactive orange 30 in aqueous solution, whereas the NiO/TiO2, CuO/TiO2 and bare photocatalyst such as NiO, CuO, TiO2 showed lower activities. It was deduced that the remarkable visible-light absorption phenomenon and band gap reduction of the NiO/CuO/TiO2 ternary composites taking place. It paves way for the photogenerated electron transfer between CB of the NiO, CuO, TiO2 semiconductors and also holes shifting between VB of above mentioned materials. The NiO/CuO/TiO2 ternary composite shows good photostability and the photocatalyst retains 94% of its initial activity in the seventh cycle, respectively.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72449667","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

Research Progress of Composite Materials of NiTi SMA and Stainless Steel NiTi SMA与不锈钢复合材料的研究进展

IF 1.3

Advances in Materials Science Pub Date : 2022-01-01 DOI: 10.11648/j.am.20221101.12

H. Zeng, Jianping Zhou, Yan Zhang

引用次数: 1

Studies on Synthesis and Electrochemical Properties of Lithium Ferrous Silicate Cathode Materials 硅酸亚铁锂正极材料的合成及电化学性能研究

IF 1.3

Advances in Materials Science Pub Date : 2022-01-01 DOI: 10.11648/j.am.20221101.13

W. Qingsheng, P. Novikov, Anadoli Popovich, Yang Zhelong, Yu-hong Yao, Okonov Leonid

引用次数: 0

Mechanical, Thermal and Hydric Behavior of the Bio-sourced Compressed Earth Block (B-CEB) Added to Peanut Shells Powder 花生壳粉中添加生物源压缩土块(B-CEB)的力学、热、水行为

IF 1.3

Advances in Materials Science Pub Date : 2022-01-01 DOI: 10.11648/j.am.20221101.11

Nassio Sory, Moussa Ouedraogo, A. Messan, Issiaka Sanou, Moustapha Sawadogo, Kouka Jeremy Ouedraogo, Halidou Bamogo, Ouanmini Bobet, L. Zerbo, M. Seynou

引用次数: 2