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729 articles for “Layer”
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Photoluminescent Reduced Graphene Oxide (rGO)–ZnO Nanocomposites Prepared Through one-pot Solvothermal Route
Abstract: In the present article, we report solvothermal synthesis of reduced graphene oxide (rGO)–ZnO nanocomposites through in situ exfoliations of graphite oxide with two different zinc-containing precursors viz. Zinc acetate dihydrate and zinc(II) acetylacetonate in water-diethylene glycol medium with hexamethylenetetramine as a reducing agent. The obtained rGO–ZnO nanocomposites were characterized by X-ray diffraction, and the ZnO lattice parameters were calculated. Raman spectroscopy indicated the presence of characteristic bands of graphene and …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 70–80 Read article
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Prediction of Process Parameters of Friction Stir Welding Using Artificial Neural Network
Abstract: In this paper an artificial neural network (ANN) approach is used to predict the process parameters of friction stir welding (FSW). Initially, the experiments are conducted using the design of experiment (DoE) approach on FSW using L27 orthogonal array. The experiments are conducted using speed, feed, and tool tilt angle as input parameters for DoE and tensile strength, hardness, and ductility as output. ANN is created having 25 neurons and …
Published in Journal of Polymer & Composites · Vol. 11, Issue 3, 2023 · pp. 13–25 Read article
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Investigation of Mechanical Characteristics of 3D Printed Composite Materials (Polyoxymethylene and Nylon (PA6))
Abstract: Metals and thermosetting polymers are being replaced by 3D printed fiber reinforced composites because of their lightweight construction and mechanical performance. The adoption of 3D printing technology is due to reduced material waste, design freedom, and the ability to construct complicated structures. A technique for additive manufacturing that can create intricately functional parts is fused deposition modeling. The 3D printed nylon fiber reinforced polyoxymethylene samples are fabricated with different proportions …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 53–64 Read article
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Investigation of Mechanical Characteristics of 3D Printed Composite Materials (Thermoplastic Urethane and Nylon (PA6))
Abstract: 3D printing has emerged as a game-changer, progressively replacing conventional metals and thermosetting polymers, primarily due to its capacity to create lightweight structures with impressive mechanical attributes. The technology's advantages, such as minimized material wastage, design adaptability, and the ability to craft intricate structures, have propelled its widespread adoption. Within the realm of additive manufacturing, Fused Deposition Modeling (FDM) stands out as a technique capable of producing intricate functional components. …
Published in Journal of Polymer & Composites · Vol. 12, Issue 1, 2024 · pp. 65–76 Read article
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Investigation into mechanical Characterstics of laminated composite materials (PMMA and NYLON) using FDM
Abstract: The widespread embrace of 3D printing technology stems from its capacity to minimize material waste, offer versatile design options, and enable the production of intricate structures. 3D printed polymer composites reinforced with fibers (carbon, glass, nylon etc.) have been extensively used in automobile, marine, aerospace and energetic applications due to their excellent properties. Nylon fiber is light weight, resistance to damage from oil and chemicals, tough, strong and has higher …
Published in Journal of Polymer & Composites · Vol. 12, Issue 2, 2024 · pp. 108–121 Read article
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Pressure Data Analysis and Multilayer Modeling of A Gas-Condensate Reservoir
Abstract: Kailastila gas field located at Golapgonj, Sylhet, is one of the largest gas fields in Bangladesh. It produces a high amount of condensate along with natural gas. For the high values of GOR, it may be treated as a wet gas at reservoir condition. Three main sand reservoirs are confirmed in this field (upper, middle and lower). In this study, it has been shown that reservoir parameters of this gas …
Published in Journal of Petroleum Engineering & Technology · Vol. 4, Issue 2, 2014 · pp. 7–15 Read article
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Additive Manufacturing in Aerospace and Defense Industries: A Review
Abstract: Additive Manufacturing (AM) is a promising fabrication technique that can offer significant benefits to aerospace industries and Defense Support Service providers. Because of its potential to delocalize production near the point of use and its transformative potential, the technology is gaining popularity. In fact AM has a great potential to revolutionise the Global manufacturing and distribution system by offering low cost and highly customized parts. AM encompasses a broad variety …
Published in Journal of Production Research & Management · Vol. 11, Issue 1, 2021 · pp. 16–36 Read article
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Novel Characteristics of GaN based Nanoelectronic Double-Heterojunction HEMTs to Establish a Solid-State-Electronics Laboratory
Abstract: The drain characteristics are investigated with respect to electrical variables (drain voltage, gate voltage) and structural parameters of high electron mobility transistors (HEMTs). Total 10526 individual simulation-outputs are reported in this work. The maximum drain current of 553 mA is achieved by the simulated structures of double-heterojunction HEMTs using the SILVACO-ATLAS software tool. The drain current is higher at shorter gate length. The drain current is higher at larger aluminium …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 3, 2017 · pp. 11–20 Read article
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Electrical Characteristics of AlGaN/GaN/AlGaN HEMTs
Abstract: AbstractA maximum drain current of 556 mA is achieved by the simulated structures of double-heterojunction AlGaN/GaN/AlGaN high electron mobility transistors (HEMTs) using the SILVACO-ATLAS software tool in this work. The drain current is observed as higher at shorter gate length. The drain current is found as higher at larger aluminium mole fraction. Also, the drain current is found as higher at larger thickness of AlGaN barrier layer. The drain current …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 3, 2018 · pp. 7–17 Read article
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Electrical Characteristics of Nanoelectronic Double-Heterojunction High Electron Mobility Transistors
Abstract: AbstractIn this work, a maximum drain current of 554 mA is achieved by the simulated structures of double-heterojunction HEMTs using the SILVACO-ATLAS software tool. The drain current is found to be higher at shorter gate length and at larger aluminium mole fraction. The drain current is also higher at larger thickness of AlGaN barrier layer and at larger doping concentration of AlGaN barrier layer.In this work, the formation of 2-DEG …
Published in Journal of Semiconductor Devices and Circuits · Vol. 7, Issue 1, 2020 · pp. 18–28 Read article
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Effect of Process Parameters on TIG Weld-Brazing of Aluminum Alloy to Galvanized Steel
Abstract: AbstractAbility to join aluminum alloy to steel enables weight reduction of automobile bodies. Gas tungsten arc welding (GTAW) process was employed to weld-braze A8011-H14 aluminum alloy to galvanized steel in lap configuration. The influence of heat input on bead formation and joint strength was investigated. The microstructural characterization was carried out using an optical microscope and scanning electron microscope. The chemical composition was analyzed using energy dispersive spectroscopy technique. The …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 5, Issue 3, 2018 · pp. 8–14 Read article
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Sputter Deposition of Ni/Ti Thin Film and their Molecular Dynamics
Abstract: Ni/Ti multilayer fabricated using DC/RF magnetron sputtering technique. Multilayer of Ni/Ti is deposited by alternate deposition of nickel layer and titanium layer, followed by annealing at different temperatures. Annealing treatment is carried out to achieve NiTi SMA thin films. The annealing was accompanied by inter-diffusion, amorphization and precipitation of various intermetallic phases. Classical molecular dynamics simulations have been performed for the atomic diffusion during annealing of Ni/Ti multilayer using embedded …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 3, Issue 2, 2016 · pp. 35–43 Read article
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Deposition of Antimony Trioxide on the Composite Surface to Increase Its Flame Retardancy
Abstract: In the present work, the preparation method of antimony trioxide and its thermal properties were extracted, as well as identified the manufacturing method to form an insulation layer from this oxide as a thickness of the covering layer (2 mm), deposited on the composite material consisting of unsaturated polyester resin and glass fiber which acts as a paste and take for the material to the insulation and flame retardant oxide. …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 2, Issue 1, 2015 · pp. 1–3 Read article
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Studies of Tin Whisker Formation and Destruction
Abstract: This article contains whisker growth in current implements considered in electronics packaging. These surface relief growths are said contemporarily to prevent and save devices after Pb abatement. Vacancy flux at crack created from compressive stresses cause mass transfer to guide oxides for direct and control of whiskers. Logical subject to shift mass from equiax to migrating morphologies of equiax such as columns. Criteria from past theories for Sn whisker growth …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 3, 2020 · pp. 26–34 Read article
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Application and Limitation of Metal Thermochemical Processing
Abstract: The technically intriguing and monetarily feasible technique for enhancing the surface layer of materials is surface engineering. The aim is to establish a vast scope of useable attributes that are separate from the core substrate, together with physical, chemical, electrical, electronic, magnetic, or mechanical, even though the material surface monitors the operational life throughout many implementations. The thermochemical intervention, a type of surface engineering, uses heat diffusion to incorporate non-metal …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 9, Issue 3, 2022 · pp. 25–29 Read article
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Wind Forecasting Using Various Neural Networks in Machine Learning
Abstract: Wind Power Forecasting, as the name applies is a process in which data of past is used to tell what kind of output can be expected from a wind turbine in the foreseeable future. Machine learning, can be said to be a derivation of artificial intelligence that makes it possible for the system to learn automatically and improve upon itself from faults, without needing to tell the system to do …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 8, Issue 2, 2021 · pp. 32–43 Read article
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An Analytical Model for Sub grid Force-Equilibrium Approach in Submerged Vegetative Channel
Abstract: A new, analytical model of the vertical flow velocity profile of submerged vegetation has been developed. Velocity profile can be divided into three zones: linear zone which is closed to bed with linear velocitydistribution, logarithmic zone which involves the main channel without vegetative cover and the middle zone (transition zone) that is affected by the momentum of upper zone. For the surface layer, Prandtl’s mixing lengthconcept is adopted resulting in …
Published in Recent Trends in Civil Engineering & Technology · Vol. 1, Issue 1-3, 2011 · pp. 1–7 Read article
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Exploring Lightweight and Earthquake-resistant Construction with Ferrocement Sandwich Panels
Abstract: The creation of sandwich panels made of ferrocement as non-load-bearing building components is examined in this study. The sandwich panels had one layer of wire mesh netting between two thin pieces of ferrocement for reinforcement. Two thin ferrocement layers strengthened with a thermocol sheet made up the sandwich sections. The two iron lattice sections were connected by steel wires. Three sandwich panels in total were made. Compared to traditional masonry …
Published in Recent Trends in Civil Engineering & Technology · Vol. 13, Issue 1, 2023 · pp. 1–6 Read article
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Analysis of Pull-in Voltage with Respect to Changes in Dielectric Material and their Thickness
Abstract: Micro Electromechanical Systems (MEMS) actuators experience pull-in effect in their actuation range. MEMS actuating elements are thin parallel plate capacitor electrodes separated with air gap. Parallel plate electrostatic micro actuators are known to have the pull-in effect, where electrostatic attractive force exceeds the mechanical restoring force of the suspending spring, and that the movable plate spontaneously pulled into physical contact with the opposite electrode. In our model the effect of …
Published in Recent Trends in Electronics Communication Systems · Vol. 2, Issue 1, 2015 · pp. 1–5 Read article
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Simple Gain Model of Group III-V Semiconductor-based Laser Diode
Abstract: In these days, a layer of low bandgap material is sandwiched between two high bandgap layers.Most commonly-used pair of materials is gallium arsenide (GaAs) with aluminium galliumarsenide (AlGaAs) and Indium Phosphide (InP) with Indium gallium arsenide phosphide(InGaAsP) laser. A heterostructure is the junctions between different bandgap materials. Here,two such junctions are present, hence it is called the name "double heterostructure laser" orDH laser. The kind of laser diode may be …
Published in Recent Trends in Electronics Communication Systems · Vol. 7, Issue 3, 2020 · pp. 9–27 Read article