Journal of materials science & engineering最新文献

{"title":"Microstructured Optical Fibers Made of Chalcogenide Glass for the Generation of Optical Functions","authors":"M. Ndiaye, N. M. Ndiaye, B. Ngom","doi":"10.12691/AJMSE-9-1-4","DOIUrl":"https://doi.org/10.12691/AJMSE-9-1-4","url":null,"abstract":"This work reports on the fabrication and optical characterization of microstructured optical fibers (MOF) made of chalcogenide glass AS2S3. For the fabrication, the Stack and Draw method was used and for the characterization, a simulation software (OptiSystem) was also used. The results of this study are as follows: the refractive index of the microstructured chalcogenide glass fibre is 1.1.10-18 m2/w much higher than that of standard silica fibre, which is 2.6 10-20 m2/w. The non-linear refractive index of these chalcogenide fibers provided to be 100 times higher than that of the standard fiber. The characterization of the Brillouin and Raman diffusion effects also gave excellent results, with respective gain values of 8.10-10 W-1 Km-1 and 1.8.10-10 W-1 Km-1, thus validating an exacerbation of the non-linear effects within this type of fiber. These results were then used to generate optical functions.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84281363","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":"Investigation of Striations of Tellurium Inclusion in (Cd,Zn)Te Crystals Grown by Travelling Heater Method","authors":"Jiao Zou, A. Fauler, A. Senchenkov, N. Kolesnikov, M. Fiederle","doi":"10.17265/2161-6213/2021.1-3.001","DOIUrl":"https://doi.org/10.17265/2161-6213/2021.1-3.001","url":null,"abstract":"","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81183102","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":"Modeling and Simulation of ΔH in Solid State Synthesis of Nanocomposites Al-Cu-Zr","authors":"A. Alomari, M. Aboelsoud","doi":"10.17265/2161-6213/2021.1-3.003","DOIUrl":"https://doi.org/10.17265/2161-6213/2021.1-3.003","url":null,"abstract":"","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85187935","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":"Effect of Universal Primers on the Tensile Bond Strength between Zirconia and Resin Composites","authors":"Akinori Ohno, M. Nagata, H. Kobayashi, Hiroaki Yamaguchi, Katsura Ohashi, Kaori Aoki, T. Nihei, K. Kimoto","doi":"10.17265/2161-6221/2021.1-3.001","DOIUrl":"https://doi.org/10.17265/2161-6221/2021.1-3.001","url":null,"abstract":"This study aimed to evaluate the effects of universal primers on the tensile bond strength between zirconia and resin composites. Zirconia specimens were divided into five groups based on the surface treatment with the following primers: MP (Monobond Plus), SU (ScotchBond Universal), AZ (AZ Primer), BM (Beauty bond Multi), and BL (Bondmer Lightless). After priming, stainless steel rods were bonded to the zirconia specimens with composite resin. The tensile bond strength test was performed: stored at room temperature for 1 day; stored in distilled water at 37 °C for 7 days; and underwent thermal cycling. The BL group demonstrated a significantly higher tensile bond strength than other groups when stored at room temperature for 1 day (p < 0.05). The primer that acted via chemical polymerization appeared to be most effective in improving the bond strength between the two materials in this study.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90722912","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":"Creative Economy and Materials Science & Engineering","authors":"Diego Santos Vieira de Jesus","doi":"10.17265/2161-6221/2021.1-3.003","DOIUrl":"https://doi.org/10.17265/2161-6221/2021.1-3.003","url":null,"abstract":"New materials are fundamental to the growth, security, and quality of life of human being sand open doors to technologies in civil, chemical, nuclear, aeronautical, mechanical, biomedical, and electrical engineering. Creative companies use multiple materials in the development of their activities, such as solid stone, fiber glass, concrete, and glass reinforced concrete, for example. Based on bibliographic research, the article examines the synergy between materials science & engineering and creative economy. The main argument indicates that this synergy creates solutions and functionalities that add value to existing products and allow the development of new products with competitive advantages. It may also contribute to the preservation of cultural values and promote sustainability.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74955054","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":"Modeling of Deformations of Fine Clayey Soils Stabilized Using Sugar Cane Molasses: Extension of the Ferber Model","authors":"Nice Ngouallat Mfoutou, N. Malanda, Jarlon Brunel Makela, P. Louzolo-Kimbémbé","doi":"10.12691/AJMSE-9-1-2","DOIUrl":"https://doi.org/10.12691/AJMSE-9-1-2","url":null,"abstract":"This work presents a theoretical study based on the instability of fine soils stabilized with sugar cane molasses. Indeed, this stabilization is only effective during the dry season in the town of Nkayi due to the scarcity or non-existence of rainfall. This being the case, let us suppose that humidification influences the intrinsic parameters of the earth materials (suction, porosity) and even the stabilization capacity of the molasses, we can try to understand the instability phenomenon that occurs within the structural matrix of the material when it is solicited during periods of heavy rainfall. The current models which study the deformation of the proposed fine soils, relate the inter-aggregate voids, the intra-aggregate voids, the stability index, the suction of the soil material and the relative humidity of the environment. Also, the theoretical study of these models shows that the inter-aggregate voids increase with relative humidity, the intra-aggregate voids decrease with increasing relative humidity and the stability index decreases with increasing relative humidity.Similarly, inter-aggregate voids decrease with increasing suction, intra-aggregate voids increase with suction and the stability index increases with suction.However, with the extension of Ferber's model, the breaking point of the earth material is obtained using these same models, i.e. this minimum point beyond which the adhesion forces in the aggregate and between the aggregates become low to ensure cohesion between the aggregates in the material for a long time. All in all, this point is significant for Pr (=35.768%, =0.5262, =0.078, = 0.0005 262), and S=146 MPa (suction value) and is defined as the breaking point below which the cohesion of the aggregates is not evident. This proposed model mathematically translates both the effects of relative humidity and suction on voids in earth materials. It also explains the deformations that take place in earth materials at the microstructure level (intra-aggregate voids and inter-aggregate voids) under the effect of moisture or suction.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88599695","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":"Effect of TiO2 Photoanode Films on the Performance of Dye Sensitized Solar Cell with Rauvolfia Vomitoria Fruit Extract","authors":"J. K. Datte, S. Yapi, L. K. Kouassi, G. Y. T. Douhoré","doi":"10.12691/AJMSE-9-1-1","DOIUrl":"https://doi.org/10.12691/AJMSE-9-1-1","url":null,"abstract":"Dye sensitized solar cells (DSSC) were investigated using Rauvolfia vomitoria fruit extract as natural sensitized of TiO2 thin film. The cells were evaluated for various thicknesses of photoanode. The optical properties were analysed with UV-Vis spectroscopy and Fourier Transform Infrared spectroscopy (FT-IR). The morphology of the TiO2 surface was observed with a scanning electron microscope (SEM). Energy levels were estimated by cyclic voltammetry, in the presence of tetrabutalamonium tetrafluoroborate (TBATFB), in anhydrous acetonitrile solution (ACN). The results showed that the optimum thickness is 10 μm which achieved a short-circuit current density (Jsc) of 0.1 mA/cm² and an open voltage (Voc) of 0.65 V while the conversion efficiency ) is 0.055%.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79273375","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":"ON APPROACH TO OPTIMIZE MANUFACTURING OF A TWO-LEVEL CURRENT-MODE LOGIC GATES IN A MULTIPLEXER BASED ON FIELD-EFFECT HETEROTRANSISTORS TO INCREASE DENSITY OF THEIR ELEMENTS. INFLUENCE OF MISMATCH INDUCED STRESS AND POROSITY OF MATERIALS ON TECHNOLOGICAL PROCESS","authors":"E. Pankratov","doi":"10.18642/jmseat_7100122105","DOIUrl":"https://doi.org/10.18642/jmseat_7100122105","url":null,"abstract":"","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76082042","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":"Analysis of CANDU Reactor Performance Using Thorium Fuel: Comparison with Natural UO2 Case","authors":"A. Y. Ellithi, Afrah AL-Khawlani","doi":"10.17265/2161-6221/2020.7-8.003","DOIUrl":"https://doi.org/10.17265/2161-6221/2020.7-8.003","url":null,"abstract":"The purpose of the paper is to study the performance of the CANDU (Canada Deuterium Uranium) reactor when the reactor core is loaded with thorium fuel mixed with plutonium isotopes with ratio 3 and 5%. A three dimensional model is designed for the core of CANDU reactor. The computer code MCNPX (Monte Carlo N–Particle Transport) is used to calculate the processes in its core. The results are compared with natural UO2 case which is the typical fuel of the reactor. The results show that the multiplication factor of the reactor is higher even in the case of thorium fuel mixed with 3% plutonium isotopes, which indicates longer neutron life cycle length and more economic utilization of the reactor.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86074748","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":"Tribological Approach and Surface Quality Analysis of Stainless Steel for Cutlery Applications after Surface Grinding","authors":"M. F. Pereira, B. Abrão, R. Viana, R. B. Silva","doi":"10.17265/2161-6221/2020.7-8.002","DOIUrl":"https://doi.org/10.17265/2161-6221/2020.7-8.002","url":null,"abstract":"In precision machining processes such as grinding, for example, analysis of machined surface is important one of most parameters to evaluate process performance. Equally important is to perform tribological analysis to understand chip formation and abrasive wheel wear, thus enabling manufacturing of components free of thermal damages. In grinding, due to high hardness of abrasive grains that remove material from workpiece in chip form and very low values of radial depth of cut, combination of low roughness values and tight dimensional tolerances is attained. Accordingly, the parameters involved in this process are determinant in surface quality that is primarily evaluated in terms of surface roughness and workpiece functionality. In this work, surface roughness (Rt parameter) and scanning electron microscope (SEM) images of ground surfaces of the AISI 420 martensitic stainless steel samples were evaluated. Tests were carried out in surface grinding with a white aluminum oxide wheel and an environmentally-friendly semisynthetic water-soluble coolant. Two values of radial depth of cut (10 μm and 25 μm) were tested. The results showed that the highest roughness values, deeper grooves on the machined surfaces as well as poorer surface quality were obtained after grinding under the severest cutting conditions.","PeriodicalId":16171,"journal":{"name":"Journal of materials science & engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85195360","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}