Materials Science Forum最新文献_第8页

New Approaches to 3D Non-Crimp Fabric Manufacturing 三维无皱织物制造新方法

Materials Science Forum Pub Date : 2024-03-19 DOI: 10.4028/p-0jh5hc

L. Hahn, Paul Penzel, Danny Friese, Marina Stümpel, Harald Michler, B. Beckmann, M. Curbach, C. Cherif

{"title":"New Approaches to 3D Non-Crimp Fabric Manufacturing","authors":"L. Hahn, Paul Penzel, Danny Friese, Marina Stümpel, Harald Michler, B. Beckmann, M. Curbach, C. Cherif","doi":"10.4028/p-0jh5hc","DOIUrl":"https://doi.org/10.4028/p-0jh5hc","url":null,"abstract":"Textile reinforcements have outstanding load-bearing capabilities due to the excellent tensile properties of high performance multifilament yarns (e.g. carbon fibers). However, in order to take full advantage of their high potential, it is necessary to ensure that the filaments run in a straight line. In order to guarantee this straight filament course, the highly efficient multiaxial warp knitting process is used for the production of 2D non-crimp fabrics (NCF) as textile preforms. In various industrial applications, most structures have complex 3D geometries. Therefore, the 2D textile needs to be shaped for reinforcement, which often results in a rearrangement of the filament orientation. Consequently, the 3D shaping process has to be taken into account during the textile production or in the shaping process itself in order to guarantee the highest mechanical properties. Using the example of lattice girders for concrete reinforcement, a new approach for the fabrication of 3D textile lattice girders in a continous shaping process is presented. The results of the production tests of the developed technology approach show no apparent filament damage and exact roving orientation with no inadvertent deflection, compression or bulging, indicating a precise and gentle shaping process. The developed technology contributes to the future reduction of the production costs of 3D textile reinforcements.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"7 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140229714","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

Comfort Properties and Antimicrobial Activity of Cotton and Nylon/PU Knits Treated with Microcapsules Containing Sea Buckthorn Oil 经含沙棘油微胶囊处理的棉和尼龙/聚氨酯针织品的舒适性和抗菌活性

Materials Science Forum Pub Date : 2024-03-19 DOI: 10.4028/p-nsfrj7

Badmaanyambuu Sarmandakh, E. Yi

{"title":"Comfort Properties and Antimicrobial Activity of Cotton and Nylon/PU Knits Treated with Microcapsules Containing Sea Buckthorn Oil","authors":"Badmaanyambuu Sarmandakh, E. Yi","doi":"10.4028/p-nsfrj7","DOIUrl":"https://doi.org/10.4028/p-nsfrj7","url":null,"abstract":"This study was performed to investigate comfort properties and antimicrobial activity of cotton and nylon knits treated with microcapsules containing sea buckthorn fruit oil reported as having antimicrobial efficacy depending on concentration of microcapsules and treatment types. Chitosan-arabic gum microcapsules containing sea buckthorn fruit oil were prepared and they were treated on cotton and nylon/PU knit respectively by an experimental design of 2 different treatment types (bath immersion method and screen printing method) Χ 5 different concentration levels of microcapsules (20, 30, 40, 50, and 60% on the weight of fabric). As comfort properties, stiffness, water-vapor permeability, and air permeability were measured objectively. Antimicrobial activity was evaluated by calculating the percentage reduction of the bacterium. As results, stiffness values of the treated knits were slightly higher than those of untreated ones, which was thought not to affect touch in wear. The values of water-vapor permeability and air permeability of both cotton and nylon after the treatment were not significantly decreased. These results means that microcapsules loaded on the knits might not worsen their wear comfort. As for antimicrobial activity, more than 90% of bacterial reduction rates against S. Aureus were shown in cotton jersey by screen printing even after repeated laundry while those was found in nylon/PU tricot by bath immersion. From these results, it was concluded that chitosan-arabic gum microcapsule containing sea buckthorn fruit oil could be utilized for textiles to provide antimicrobial activity.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"44 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140229139","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

Tensile Properties of Different Yarn Structures Based on Recycled Carbon Fibre for Sustainable Thermoset Composites 可持续热固性复合材料中基于回收碳纤维的不同纱线结构的拉伸性能

Materials Science Forum Pub Date : 2024-03-19 DOI: 10.4028/p-xrj5ka

Mmb Hasan, A. Abdkader, Tobias Georg Lang, T. Gereke, C. Cherif

{"title":"Tensile Properties of Different Yarn Structures Based on Recycled Carbon Fibre for Sustainable Thermoset Composites","authors":"Mmb Hasan, A. Abdkader, Tobias Georg Lang, T. Gereke, C. Cherif","doi":"10.4028/p-xrj5ka","DOIUrl":"https://doi.org/10.4028/p-xrj5ka","url":null,"abstract":"The development of different hybrid yarn structures from recycled carbon fibre (rCF) (rCF content approx. 50% by weight) and thermoplastic fibres for thermoplastic composites has been reported earlier. However, manufacturing of yarns with high rCF content (>90%) required for thermoset composites is still not realizable due to high shortening (≥ 70%) in fibre length of rCF, which occurs during different processing steps of spinning. The reason lies in low shear strength, smooth fibre surface, small diameter and high brittleness of rCF. In addition to this, lack of crimp in rCF leads to drafting error during drawing and spinning process. Therefore, there is a high demand on rCF yarns for thermoset composites, as around 70% of composites are produced based on thermoset matrix. In this paper, yarns consisting of staple rCF with high rCF content (>90 weight%) are developed on DREF-friction spinning and wrap spinning technologies. For the production of yarns, slivers with different rCF content are produced using carding and drawing machine. The effect of different spinning parameters suction air pressure for DREF friction spun yarns and yarn twist for wrap spun yarns is investigated and their effect on tensile properties of yarn is analysed. The results show that the tensile properties of yarns can be adjusted to a wide range varying the yarn structure and spinning parameters.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"58 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140231031","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

Corrosion Resistance and Thermal Stability Enhancement of Green Layered Clay/Epoxy Coating 增强绿色层状粘土/环氧树脂涂层的耐腐蚀性和热稳定性

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-efeh4q

S. M. Kabeb, Azman Hassan, Farah Hanani Zulkifli, Farasuraya Che Zakaria, Atif Ur Rahman

{"title":"Corrosion Resistance and Thermal Stability Enhancement of Green Layered Clay/Epoxy Coating","authors":"S. M. Kabeb, Azman Hassan, Farah Hanani Zulkifli, Farasuraya Che Zakaria, Atif Ur Rahman","doi":"10.4028/p-efeh4q","DOIUrl":"https://doi.org/10.4028/p-efeh4q","url":null,"abstract":"A layered clay/epoxy coating was fabricated to investigate the effects of montmorillonite (MMT) and halloysite nanotube (HNT) loading at 0.5, 1.5, and 2.5 parts per hundred resin (phr) on the corrosion resistance and thermal stability of coated mild steel plates. The corrosion study was carried out by Electrochemical Impedance Spectroscopy (EIS) and Tafel polarization. The |Z|0.1Hz value, Rct, and Rp of the layered/clay epoxy coatings containing 1.5 phr of HNT and MMT exhibited the best anticorrosion performance compared to other clay content levels. The |Z|0.1Hz value for the epoxy coating filled with 1.5 phr of MMT (M1.5) is 2.132 × 109 Ω·cm², while it is slightly higher for H1.5 coatings, i.e., 2.629 × 109 Ω·cm². Water absorption trends were consistent with EIS and Tafel polarization studies. The presence of highly compatible nanocontainers clay reduced the total free volume and promoted cross-linking, enhancing anticorrosion performance. Thermal Gravimetry Analysis (TGA) showed that a 1.5 phr loading of MMT in layered/clay epoxy coating demonstrated better thermal stability than a coating embedded with HNT. This improvement can be attributed to the barrier effect of MMT, which retards the diffusion of oxygen molecules into the coating.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"128 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079036","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

Process Optimization of Spark Plasma Sintered Parameters for Ti-Al-Cr-Nb-Ni-Cu-Co High Entropy Alloy by Response Surface Methodology 响应面法优化 Ti-Al-Cr-Nb-Ni-Cu-Co 高熵合金的火花等离子烧结参数工艺

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-0bsg8t

U. Anamu, E. Olorundaisi, O. Ayodele, B. Babalola, P.I. Odetola, A. Ogunmefun, K. Ukoba, T.-C. Jen, P. Olubambi

{"title":"Process Optimization of Spark Plasma Sintered Parameters for Ti-Al-Cr-Nb-Ni-Cu-Co High Entropy Alloy by Response Surface Methodology","authors":"U. Anamu, E. Olorundaisi, O. Ayodele, B. Babalola, P.I. Odetola, A. Ogunmefun, K. Ukoba, T.-C. Jen, P. Olubambi","doi":"10.4028/p-0bsg8t","DOIUrl":"https://doi.org/10.4028/p-0bsg8t","url":null,"abstract":"In this study, the influence of operating parameters on the relative density and microhardness property of a septenary equiatomic Ti-Al-Cr-Nb-Ni-Cu-Co high entropy alloy developed via spark plasma sintering (SPS) process was investigated at constant heating rate (100 °C/min), dwell time (5 min), pressure (50 MPa). Using response surface methodology (RSM) on the sintering temperature (ST) and milling time (MT) as the process variable parameters, a predictive model was established. The design of experiment approach was employed to minimize numbers of runs of experiment, which invariably eliminates trial by error associated with traditional experimental methods. MT and ST were taken as the variables towards the development of the design model. The optimum operating parameters were predicted using the user-defined design (UDD) under RSM and the result was validated through experiments. Observation from the results shows that MT and ST play a significant role in achieving high densification, which translates to high hardness. At 900 °C ST and MT of 10 hours, the highest hardness value of 580.1 HV, densification of 99.98%, and percentage porosity of 0.02% were recorded.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140263932","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

Investigation into Stress Relaxation and Creep Rate of C47200 Copper Alloy C47200 铜合金的应力松弛和蠕变率研究

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-yyjr2w

S. Akande, Tuoyo Ikomi, T. Azeez, O. Ikumapayi

{"title":"Investigation into Stress Relaxation and Creep Rate of C47200 Copper Alloy","authors":"S. Akande, Tuoyo Ikomi, T. Azeez, O. Ikumapayi","doi":"10.4028/p-yyjr2w","DOIUrl":"https://doi.org/10.4028/p-yyjr2w","url":null,"abstract":"Copper alloys have high thermal conductivity, relatively high mechanical strength, and toughness over a wide range of temperature; hence they are highly sorted for complex structural applications that required extreme heat flux under load. Creep of materials is classically associated with time-dependent plasticity under a constant stress/load at an elevated temperature, often greater than the absolute melting temperature. This research is aimed to study the evaluation of stress and creep rate in copper, identifying the mechanisms at which copper can easily be exposed to stress and creep deformations in structures. A 12 mm diameter copper rod with the composition of 52.05 % CuO and 30.26 % SnO2 was procured locally. Samples from the procured rod were heat treated to 650°C for 30 minutes and cooled in the still air as well as inside the furnace. Creep test was carried out at 760uC with a constant load corresponding to an initial stress (between 1.5 MPa and 350 MPa) and stress relation was carried out on a 98 kN capacity stress relaxation frame (from 350 MPa to 300 MPa). Rockwell hardness test and metallographic analysis (at 200 mm) were also conducted on the heat treated and unheated control samples. It was established that heat treatment reduced the hardness property of stress relaxed copper, accelerated the stress relaxation process up to 60 %, speed up both primary creep rate and the tertiary creep rate as well altered the linear creep pattern and behaviour.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"51 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140264858","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

Identification of Waste Potential from Maritime Activity - Incorporating Polyethylene Cables into Building Construction 确定海事活动产生废物的可能性 - 将聚乙烯电缆纳入建筑施工中

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-h5jgdw

R. Barboza, Harish Daruari, Antonieta Rocha, Miguel A. Carvalho, Paulo Mendonça

{"title":"Identification of Waste Potential from Maritime Activity - Incorporating Polyethylene Cables into Building Construction","authors":"R. Barboza, Harish Daruari, Antonieta Rocha, Miguel A. Carvalho, Paulo Mendonça","doi":"10.4028/p-h5jgdw","DOIUrl":"https://doi.org/10.4028/p-h5jgdw","url":null,"abstract":"Currently, the Azores face a significant problem due to the existence of a large quantity of marine debris derived from fishing activities and gear. This issue represents a threat to the social and environmental aspects of the region. The lack of adequate disposal of this waste produced by the fishing industries is leading to a disruption of the ecosystem. A broad study within the scope of the Azores Ecoblue project in partnership with the Regional Government of the Azores aims to quantify/parameterize and qualify waste from fishing gear. Focused on analyzing the possibility and opportunity of creating a source of revenue for the Region from these raw materials used by the stakeholders identified by a research project called Azores Ecoblue. This survey is being carried out with the aim of identifying adversities related to materials, resulting in the proposal of solutions, involving the recycling and transformation of the polymer, Polyethylene, typically used in mooring cables on fishing vessels. It is essential to raise awareness of the need to reconsider the collection of waste with sustainable potential and relevance in the social and economic context of the region. Polymer identification and characterization was performed in an attempt to address the problem at the source. In addition to identifying the material, this research focuses on characterizing its thermal properties. The development of a construction system composed of reused cables, to be included in a demonstrative prototype, was developed and is presented in this article, emphasizing the importance of implementing sustainable solutions to address the issue of marine litter on the Azorean coast and promote the circular economy.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"108 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079400","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

Investigation of the Behavior of Surface Roughness Suppression Orientation on the Inner Surface of Metal Microtubes Using Crystal Plasticity Finite Element Method 利用晶体塑性有限元法研究金属微管内表面粗糙度抑制方向的行为

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-loh9kf

Hayate Sakaguchi, Takuma Kishimoto, Takayuki Hama, K. Tashima, Shinsuke Suzuki

引用次数: 0

Durability Studies of Conventional Cement Concrete and Geopolymer Concrete 传统水泥混凝土和土工聚合物混凝土的耐久性研究

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-o39dkm

Lakshmi Vara Prasad Meesaraganda, E. Mazumder, L. R. Reddy

{"title":"Durability Studies of Conventional Cement Concrete and Geopolymer Concrete","authors":"Lakshmi Vara Prasad Meesaraganda, E. Mazumder, L. R. Reddy","doi":"10.4028/p-o39dkm","DOIUrl":"https://doi.org/10.4028/p-o39dkm","url":null,"abstract":"The service life of structural members is significantly impacted by the durability of the concrete and that they are made of. The embedded reinforcing steel in durable concrete is protected from corrosion, and the possibility of concrete spalling in the concrete as a result of chemical attack is reduced. This study investigates the effectiveness of geopolymer concretes prepared using fly ash or a mixture of fly ash and slag (SLG). The performance of OPC concrete is likewise evaluated for comparing the durability of geopolymer concretes. This is done in order to compare the two types of concrete. All of the prepared specimens were submerged in theee types of distinct solutions up to 9 months. Four different types of solutions are (i) sodium chloride with 5% concentration, (ii) sodium sulphate 5% concentration, (iii) combination of magnesium sulphate with sodium sulphate with 5% concentration both, and sulphuric acid 3% concentration. The variation in properties were evaluated throughout the duration of the exposure period. According to the findings, it has been demonstrated that Na2SO4 (sodium sulphate) has the most significant effect on the geopolymer concretes, whereas sulphuric acid has the greatest potential to break down OPC concrete. With the effect of sulfuric acid, the strength reduction was 26.57% for OPC concrete and where as for flyash & SLG concretes it is 10.87% & 7.26% respectively. According to the findings, the durability performance of geopolymer concrete is, in general, better to that of cement concrete.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"131 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140078740","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

Silica Fume-Red Mud Based Geopolymer Stabilized Organic Soil 硅灰红泥土基土工聚合物稳定有机土壤

Materials Science Forum Pub Date : 2024-03-05 DOI: 10.4028/p-vdler9

Rezaul Islam Choudhury, Monowar Hussain

{"title":"Silica Fume-Red Mud Based Geopolymer Stabilized Organic Soil","authors":"Rezaul Islam Choudhury, Monowar Hussain","doi":"10.4028/p-vdler9","DOIUrl":"https://doi.org/10.4028/p-vdler9","url":null,"abstract":"Organic soil presents significant challenges for construction due to its unsuitability as a soil type, often necessitating stabilization using conventional agents like cement. The Silica Fume (SF)-Red Mud (RM) binder mix emerges as a promising alternative stabilizer due to its low carbon footprint coupled with its superior strength-enhancing properties. In this study,we explore the feasibility of employing SF-RM based geopolymer to stabilize organic soil. To activate the collected samples, a solution of sodium hydroxide (NaOH) with molarity (M) of 6, 9, and 12 were utilized, as well as binder (SF + RM) proportions of 10%, 20%, 30%, and 40% relative to dried organic soil and alkali-to-binder (A/B) proportions of 0.5, 0.7, and 0.9, respectively. The experimental results reveal that a variety of factors, including NaOH molarity, A/B proportions, pH, and curing duration, have an effect on the unconfined compressive strength (UCS) of treated organic soil. The best combination was obtained with a binder concentration of 30%, a NaOH molarity of 9M, and an A/B proportion of 0.7. After 28 days of curing, the UCS of the treated organic soil (1714 kPa) was found to be 168 times that of the untreated organic soil (10.2kPa). Further, the production of compounds such as aluminium silicate, sodium aluminosilicate, and potassium aluminosilicate, which have been found by X-ray diffraction (XRD) research, can be ascribed to the increase in strength. Furthermore, when subjected to analysis through Field Emission Scanning Electron Microscopy (FESEM), it becomes evident that these items play a pivotal role in filling the voids within the soil-binder composite. As a consequence, they facilitate the creation of a more smoother, compact and denser structure.","PeriodicalId":18262,"journal":{"name":"Materials Science Forum","volume":"114 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079161","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