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World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering最新文献

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EVALUATION OF A REFRIGERATION SYSTEM BASED ON NANO-REFRIGERANTS AND NANO LUBRICANT 基于纳米制冷剂和纳米润滑剂的制冷系统评价
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2021-10-20 DOI: 10.17654/mt020020093
H. S. Mohamed, U. Camdali
{"title":"EVALUATION OF A REFRIGERATION SYSTEM BASED ON NANO-REFRIGERANTS AND NANO LUBRICANT","authors":"H. S. Mohamed, U. Camdali","doi":"10.17654/mt020020093","DOIUrl":"https://doi.org/10.17654/mt020020093","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79450616","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
MERCERIZED URENA LOBATA FIBER EPOXY COMPOSITES: FIBER LOADING, ASPECT RATIO AND MECHANICAL PROPERTIES 丝光环氧脲纤维复合材料:纤维负荷、长径比和力学性能
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2021-10-20 DOI: 10.17654/mt020020073
Uzondu Francis Nnamuzie
{"title":"MERCERIZED URENA LOBATA FIBER EPOXY COMPOSITES: FIBER LOADING, ASPECT RATIO AND MECHANICAL PROPERTIES","authors":"Uzondu Francis Nnamuzie","doi":"10.17654/mt020020073","DOIUrl":"https://doi.org/10.17654/mt020020073","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77760714","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
TEMPERATURE DEPENDENCE OF THE THERMALLY COUPLED LEVELS IN Er3+-DOPED BaY2F8 CRYSTAL TEMPERATURE SENSOR 掺Er3+ BaY2F8晶体温度传感器中热耦合能级的温度依赖性
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2021-10-10 DOI: 10.17654/mt020010001
Shuai Wang, Y. Ruan, Pengfei Wang
{"title":"TEMPERATURE DEPENDENCE OF THE THERMALLY COUPLED LEVELS IN Er3+-DOPED BaY2F8 CRYSTAL TEMPERATURE SENSOR","authors":"Shuai Wang, Y. Ruan, Pengfei Wang","doi":"10.17654/mt020010001","DOIUrl":"https://doi.org/10.17654/mt020010001","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76013584","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
NUMERICAL ANALYSIS OF CAVITATION FLOW IN A RECTANGULAR CROSS SECTION VENTURI NOZZLE 矩形截面文丘里喷嘴内空化流动的数值分析
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2020-06-20 DOI: 10.17654/mt019010035
José Bismark de Medeiros, Gustavo Pacheco, Edna Santiago Benta, Luiz Mariano Pereira
{"title":"NUMERICAL ANALYSIS OF CAVITATION FLOW IN A RECTANGULAR CROSS SECTION VENTURI NOZZLE","authors":"José Bismark de Medeiros, Gustavo Pacheco, Edna Santiago Benta, Luiz Mariano Pereira","doi":"10.17654/mt019010035","DOIUrl":"https://doi.org/10.17654/mt019010035","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78693165","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
Study of the Hardness and Microstructure of Quenched ABNT 1045 Steel Bars and Their Relationship to the Lumped Thermal Systems ABNT 1045淬火钢的硬度、显微组织及其与集总热系统关系的研究
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2019-08-01 DOI: 10.5923/J.IJMEE.20190701.01
L. G. Barbosa, Luciano Goetems, Carlos Alexandre Rech, Fábio Luis Knewitz
{"title":"Study of the Hardness and Microstructure of Quenched ABNT 1045 Steel Bars and Their Relationship to the Lumped Thermal Systems","authors":"L. G. Barbosa, Luciano Goetems, Carlos Alexandre Rech, Fábio Luis Knewitz","doi":"10.5923/J.IJMEE.20190701.01","DOIUrl":"https://doi.org/10.5923/J.IJMEE.20190701.01","url":null,"abstract":"Lumped thermal systems are characterized by uniform interior temperature during heat transfer processes, having as only important factor the time. Thus, the present research has proposed to investigate one of these systems in order to determine a maximum radius along which the microstructure and hardness are homogeneous after performing a quenching heat treatment. Cylindrical samples with diameters equal to 12.7, 14.0, 15.0, 16.0, 16.5, 17.0, 18.0 and 19.0 mm of ABNT 1045 steel were produced with ratios of 20:1 between the length and radius. Afterwards, they were heated in a kiln to 845°C, where they remained between 30 minutes (smaller diameter) and 45 minutes (larger diameter), for complete austenitization. Thereafter, they were rapidly cooled in water to room temperature. With the samples already sectioned, the hardness values were measured and the microstructures along the radius were verified by metallography. The results indicated that for the samples of 12.7, 14.0 and 15.0 mm, the hardness measurements were the same in the center, in the middle of the radius and near the surface, characterizing martensitic microstructures that were corroborated by the metallographies. For the samples of 16.0, 16.5, 17.0, 18.0 and 19.0 mm, the results were not homogeneous along the radius. In this way, it has been found that the maximum diameter at which ABNT 1045 steel cylindrical bars behave as lumped thermal systems is 15.0 mm.","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"122 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79061312","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
MAPb1-xInxBr3 PEROVSKITE CRYSTALS DEPOSITION AND GROWTH ON FLUORINE DOPED TIN OXIDE COATED GLASS SUBSTRATES (FTO) BY SPIN COATING PROCESS FOR SOLAR CELLS 用自旋镀膜法在氟掺杂氧化锡玻璃衬底上沉积和生长MAPb1-xInxBr3钙钛矿晶体
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2019-06-30 DOI: 10.17654/MT018010041
D. Soro, Y. Doumbia, M. Sidibé, B. Marí, S. Touré, M. Baneto
{"title":"MAPb1-xInxBr3 PEROVSKITE CRYSTALS DEPOSITION AND GROWTH ON FLUORINE DOPED TIN OXIDE COATED GLASS SUBSTRATES (FTO) BY SPIN COATING PROCESS FOR SOLAR CELLS","authors":"D. Soro, Y. Doumbia, M. Sidibé, B. Marí, S. Touré, M. Baneto","doi":"10.17654/MT018010041","DOIUrl":"https://doi.org/10.17654/MT018010041","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83778834","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
EXPERIMENTAL STUDY OF A PARABOLIC SOLAR CONCENTRATOR WITH OPTIMIZED BACK AXIAL DISTANCE OF THE FOCAL POINT 抛物型聚光器焦点后轴距优化实验研究
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2019-06-30 DOI: 10.17654/MT018010017
S. Modibo, T. Siaka, D. Soro, D. Idrissa, B. Marí
{"title":"EXPERIMENTAL STUDY OF A PARABOLIC SOLAR CONCENTRATOR WITH OPTIMIZED BACK AXIAL DISTANCE OF THE FOCAL POINT","authors":"S. Modibo, T. Siaka, D. Soro, D. Idrissa, B. Marí","doi":"10.17654/MT018010017","DOIUrl":"https://doi.org/10.17654/MT018010017","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79516013","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: 4
Reinforcing Effects of Natural Micro-Particles on the Dynamic Impact Behaviour of Hybrid Bio-Composites Made of Short Kevlar Fibers Reinforced Thermoplastic Composite Armor 天然微粒对短凯夫拉纤维增强热塑性复合装甲混杂生物复合材料动态冲击性能的增强作用
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2019-06-01 DOI: 10.5281/ZENODO.3300548
Edison E. Haro, A. Odeshi, J. Szpunar
{"title":"Reinforcing Effects of Natural Micro-Particles on the Dynamic Impact Behaviour of Hybrid Bio-Composites Made of Short Kevlar Fibers Reinforced Thermoplastic Composite Armor","authors":"Edison E. Haro, A. Odeshi, J. Szpunar","doi":"10.5281/ZENODO.3300548","DOIUrl":"https://doi.org/10.5281/ZENODO.3300548","url":null,"abstract":" Abstract — Hybrid bio-composites are developed for use in protective armor through positive hybridization offered by reinforcement of high-density polyethylene (HDPE) with Kevlar short fibers and palm wood micro-fillers. The manufacturing process involved a combination of extrusion and compression molding techniques. The mechanical behavior of Kevlar fiber reinforced HDPE with and without palm wood filler additions are compared. The effect of the weight fraction of the added palm wood micro-fillers is also determined. The Young modulus was found to increase as the weight fraction of organic micro-particles increased. However, the flexural strength decreased with increasing weight fraction of added micro-fillers. The interfacial interactions between the components were investigated using scanning electron microscopy. The influence of the size, random alignment and distribution of the natural micro-particles was evaluated. Ballistic impact and dynamic shock loading tests were performed to determine the optimum proportion of Kevlar short fibers and organic micro-fillers needed to improve impact strength of the HDPE. These results indicate a positive hybridization by deposition of organic micro-fillers on the surface of short Kevlar fibers used in reinforcing the thermoplastic matrix leading to enhancement of the mechanical strength and dynamic impact behavior of these materials. Therefore, these hybrid bio-composites can be promising materials for different applications against high velocity impacts.","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"77 1","pages":"359-369"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90507591","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
EXPERIMENTAL CHARACTERIZATION OF GRAPHENE-BASED POLYMER MATRIX COMPOSITES FOR AN UNMANNED AERIAL VEHICLE 无人机用石墨烯基聚合物基复合材料的实验表征
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2019-04-20 DOI: 10.17654/MT018010001
R. Vijayakumar, S. Maharana
{"title":"EXPERIMENTAL CHARACTERIZATION OF GRAPHENE-BASED POLYMER MATRIX COMPOSITES FOR AN UNMANNED AERIAL VEHICLE","authors":"R. Vijayakumar, S. Maharana","doi":"10.17654/MT018010001","DOIUrl":"https://doi.org/10.17654/MT018010001","url":null,"abstract":"","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80853842","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
Microstructure, Mechanical Properties and Wear Behaviour of Semisolid Stir Casting SiC Reinforced Zn-40Al Based Composites 半固态搅拌铸造SiC增强Zn-40Al基复合材料的组织、力学性能和磨损性能
World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-12-15 DOI: 10.15344/2455-2372/2018/145
G. Geng, D. X. Wang, P. Xue, F. Dong
{"title":"Microstructure, Mechanical Properties and Wear Behaviour of Semisolid Stir Casting SiC Reinforced Zn-40Al Based Composites","authors":"G. Geng, D. X. Wang, P. Xue, F. Dong","doi":"10.15344/2455-2372/2018/145","DOIUrl":"https://doi.org/10.15344/2455-2372/2018/145","url":null,"abstract":"The Zn-40Al composites with various contents of SiC were fabricated by the semi-solid stir casting process. The influence of the SiC on the microstructure, mechanical properties and wear behavior of the composites were investigated. Microstructure analysis shows that the microstructures of as-cast Zn-Al alloys are refined by the addition of SiC. However, with the increase of SiC content, a number of shrinkage porosity occur. The hardness of the composites increases with the increase content of SiC. The tensile strength of the composites declines significantly with the increase content of SiC. The most effective strengthening achieves in Zn-40Al/0.5wt.% SiC, with a maximum increment of 20% in tensile strength compared to non-SiC addition alloy. The overall results reveal that the composites possess similar friction coefficients but the abrasion loss is reduced to less than a tenth after adding 0.5% SiC.","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75231993","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
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