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Coating - Science topic

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This study delves into an improved hardfacing approach for addressing high-temperature wear issues in engineering valves used in power plants. The suggested approach uses plasma transfer arc welding (PTAW) of Colmonoy 6 with an SS-309L buffer layer on P91 steel (CoSP91). Comparative investigation shows that CoSP91 has a 67 % improvement in wear res...
Research
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ANSYS-FLUENT using, Analysis of the temperature distribution through the room's walls takes into account the effect of using air gaps of various thicknesses for a number of gaps (8 cm, 5 cm, and 2.5 cm) between walls, with the goal of determining the ideal thickness. The analysis is done through simulation, with the results being compared to those...
Article
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The detection of defects on automotive coated surfaces is of paramount importance to ensure the quality of automotive appearance. However, due to the challenges posed by the lack of sufficient samples of product-specific coated defects, the uneven number of species, and the difficulty of detecting defects in small targets due to the complex backgro...
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Casas noturnas estão dentro das diversas formas de lazer disponíveis ao público. Entretanto, quando não regularizadas podem causas efeitos negativos e até fatalidades, como na tragédia ocorrida em 27 de janeiro de 2013 na Boate Kiss em Santa Maria no estado do Rio Grande do Sul, em decorrência das várias irregularidades presentes no local. A ocorrê...
Article
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We first prove that the internal stress state within a double coated elastic inhomogeneity having an (\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$n+1$$\end{document...
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A investigação dos parâmetros do processo de soldagem a arco elétrico é essencial para a viabilidade do revestimento, uma solução eficiente em comparação ao componente maciço, tanto do ponto de vista econômico quanto em relação à redução do peso final da estrutura. O processo MIG/MAG – PV oferece diversos benefícios em relação ao processo convencio...
Article
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Manganese dioxide (MnO2) are extremely promising materials for zinc-ion batteries because of their high specific capacity, high capacity for operation, affordability, and non-toxicity. However, the low conductivity and capacity degradation issues of MnO2 limit its application. In this study, composite cathode materials of MnOx@C are designed using...
Article
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The spectral responsivity of photodetectors exhibits significant variations across different wavelengths. Such variations can induce substantial errors when large-scale detector array modules are employed for the measurement of laser spot parameters. In this regard, a single-channel data correction methodology is proposed herein to mitigate the spe...
Article
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The laser-induced damage threshold of a grating waveguide output coupler (GWOC) exposed to laser radiation at a wavelength of 1030 nm and with a pulse duration of 500 fs was investigated. The GWOC is a combination of a sub-wavelength circular grating and a partial reflector based on a Nb2O5 and SiO2 multilayer sequence. It was designed to be used a...
Article
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The continuous evolution of coating materials is critically important to driving innovative technologies in various domains, especially advanced electrical devices [...]
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In this study, the interfacial cracking mechanism of Cr-coated Zircaloy cladding tubes was investigated through a combination of tensile testing, advanced microstructural characterization, and first-principle calculations. The results demonstrate the presence of an interlayer (33 nm) between the Cr coating and the Zr substrate, which consists of Cr...
Article
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Additive manufacturing of optical, electrical, and mechanical components is a beneficial approach for the rapid prototyping of components and error elimination, with short turnaround times. However, additively manufactured components usually have rough surfaces that need post-processing, particularly for optical components, where the surface roughn...
Article
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In all air plasma sprayed (APS) environmental barrier coating (EBC) applications, the predominant goal is to achieve maximum coating density, gas tightness, and/or hermeticity prior to subjecting it to harsh environments (i.e., high-temperature impingement of high-velocity water vapor). The microstructures of APS coatings are historically understoo...
Preprint
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A new method based on negative thermal expansion material coating is proposed to realize temperature insensitive fiber coupler. By coating a layer of modified epoxy resin with a negative thermal expansion coefficient onto the coupling region of fiber coupler, a stable splitting ratio over a wide temperature range can be achieved. A finite-element m...
Article
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A surface plasmon resonance sensor inspired by the lotus root plant and utilizing photonic crystal fibers has been designed and evaluated using the finite element method. The study is divided into two parts: the first explores the lotus root-inspired sensor, while the second examines a modified design with horizontally oriented elliptical air holes...
Article
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Ultrafast Bessel beams have shown great potential in scientific research and industrial applications, particularly in laser material processing. However, traditional methods for generating Bessel beams typically rely on external phase elements, which increase the complexity and reduce the efficiency of the laser system. Here, we report a compact Ke...
Article
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O processo de fabricação por meio da tecnologia MADA (Manufatura Aditiva por Deposição a Arco) é uma excelente solução na construção de peças, garantindo qualidade e eficiência. A produção de componentes com geometrias complexas, viabilizada por trajetórias contínuas e estratégias otimizadas, reforça a importância dessa tecnologia no contexto indus...
Article
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We report on laser-induced damage behaviour in the nanosecond regime of anti-reflection coated, large aperture, ceramic Yb:YAG. Experiments were carried out to identify suitable coatings for use in large-aperture DiPOLE cryogenic laser amplifiers and involved the testing of 9 coating types from 7 different coating suppliers. Comparison between ex-s...
Article
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The friction behavior of surfaces is investigated which are coated with surface‐attached hydrogel layers inspired by the structure of natural synovial joints. Photoinduced C,H insertion chemistry is used to form polymer networks from hydrogel precursor polymers and simultaneously link them to both sliding partners. As the crosslinking is performed...
Article
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In general, the weakness of particle board is its low strength. This research aims to increase the strength of particle board through modification of particle board in the form of hybrid particleboard (HPb). In this research, HPb was made using Cotylelobium melanoxylon for the core layer and Gigantochloa pruriens, Bambusa vulgaris, and Gigantochloa...
Article
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Slot-die coating is widely used in the preparation of negative electrodes for lithium batteries. The thickness of the negative electrode has a significant influence on the battery performance and lifespan, and different manufacturers have different requirements for its thickness. In order to reduce the waste caused by trial and error in the electro...
Article
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The electrode slot die coating for lithium-ion batteries is characterized by its large scale and high efficiency, with significant advancements in recent years. Coating stability, a critical factor of lithium-ion batteries quality, is significantly influenced by numerous factors. To address this, a computational model for slot die coating has been...
Article
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A theoretical model of residual moisture of the processed material has been developed, which allows obtaining reliable parameters of the squeezing process and assessing the technological efficiency of the squeezing process. It has been established that with an increase in the roller radius, the thickness of the contacting bodies and a decrease in t...
Article
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Low-pressure plasma cleaning technology is currently regarded as a highly promising method for the effective in-situ removal of surface contaminants from large-aperture optical components (LAOC) (⩾430 mm) in laser fusion facilities. After a long cleaning, irreversible damage can occur to the sol-gel antireflective (AR) coatings on the surface of th...
Article
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Mathematical models of the shape of the contact curves of the squeezing rolls are obtained. Based on the analysis of the phenomenon of interaction and filtration of moisture in the squeezing module, calculation formulas are obtained for determining the ratio of the deformation rates of the contacting bodies. It is revealed that with an increase in...
Article
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An Inconel 718 coating was applied to the surface of 316L stainless steel to enhance its wear resistance. The coating’s phase composition, element distribution, microstructure, hardness, and wear resistance were analyzed. The results revealed that the Inconel 718 coating comprised the γ∼(Fe, Ni) solid solution, Ni3Nb, (Nb0.03Ti0.97)Ni3, and MCX (M...
Article
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Conglomerates of CuI nanoparticles combined with ferrous ferrite (FF) and cobalt ferrite (CF) nanoparticles were obtained using hot-water-soluble starch (HWSS) as a green adhesive possessing a strong complexing affinity for...
Article
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This study models the dynamic response of a damped heterogeneous coating layer over a homogeneous elastic half-space via the shear horizontal equation of motion. The so-called partial nonhomogeneous has been considered in the coating, where only the density of the material features the inhomogeneity parameter. This unusual consideration, motivated...
Article
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As one of the lightest metallic structural materials, magnesium (Mg) alloys possess numerous distinctive properties and are utilized across a broad spectrum of applications. However, the poor corrosion resistance of Mg alloys limits their application. Micro-arc oxidation (MAO) is an effective surface treatment method that enhances the corrosion res...
Article
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Discover if the Ninja Air Fryer Max XL is a safe, toxic-free cooking appliance. Learn about its PFOA-free, PTFE-free ceramic coating, BPA-free construction, and health benefits for healthier, crispy meals with less oil.
Preprint
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Pate et al. \cite{pate} investigated a macroscopic opto-mechanical system with a narrow-gap re-entrant cavity coupled to a SiN membrane resonator coated with Au or Nb. They observed a significant increase in the membrane's effective spring constant $k_{\rm eff}$ for sub-2-micron gaps $x$. This increase scales roughly with $x^{-4}$, suggesting an at...
Article
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The electrical contact and tribological performance of contacts are critical for the reliable transmission of electric power and signals. In this study, a nickel layer was applied as an underlayer at the interface, and the effects of its thickness and plating process on the electrical and tribological properties were systematically investigated. Re...
Article
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An analytic theory of X-ray (E∼0.04-4 keV) diffraction from wideband multilayer coated gratings is developed. It is found that the wideband blazed gratings can operate in the single-order regime when only one diffraction wave is effectively excited. The diffraction efficiency achieves the reflectivity of conventional depth-graded multilayer mirrors...
Article
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The high specific capacity and safety nature of silicon (Si) anode has garnered significant attention and investment for its application in high‐energy‐density lithium‐ion batteries (LIBs). However, the Si anode exhibits low initial Coulombic Efficiency (CE) and compromised cycle stability due to interfacial side reactions and the volume expansion...
Article
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The influence of laser-induced active Brownian motion on dust-acoustic instability in the colloidal plasma of a direct current glow discharge was experimentally studied. The dust structure was formed by spherical monodisperse melamine-formaldehyde particles with a partial copper coating (Janus particles). It is shown that with increasing laser radi...
Article
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Wood serves as a green biomass material with sustainable utilization and environmental friendliness. The modification of wood can be used to obtain superhydrophobic properties and further expand wood’s application range. This paper focuses on the development status of superhydrophobic surfaces with micro-/nanoscale rough structures. Based on the su...
Preprint
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Large language models (LLMs) have demonstrated remarkable reasoning capabilities across diverse domains. Recent studies have shown that increasing test-time computation enhances LLMs' reasoning capabilities. This typically involves extensive sampling at inference time guided by an external LLM verifier, resulting in a two-player system. Despite ext...
Article
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In this study, Inconel 625 coatings were deposited onto the surface of 2Cr13 stainless steel via laser cladding technology to ensure their corrosion resistance and mechanical properties. The microstructure and characteristics of coatings were adjusted by varying laser power (1200, 1500, and 1800 W), scanning speed (10, 15, and 25 mm/s), and overlap...
Article
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Rechargeable alkaline Zn/CuO batteries are a promising candidate for energy storage applications due to their high capacity and low cost. Recent studies have shown that the addition of Bi2O3 and the implementation of carbon coating on CuO cathodes enhances the performance and improves the cyclability of Zn/CuO batteries. However, the mechanism of i...
Article
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This research focuses on the study of the tensile modulus and impact resistance) of acrylonitrile-butadiene-styrene (ABS) and its blends with polycarbonate (ABS/PC) including recycled and painted material. A comprehensive assessment was done to determine the impact of reprocessing cycles, remaining coating and their combined effect in the final pro...
Article
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By using the obtained closed analytic solution of the problem of thermoelasticity for a half space with multilayer coating under the conditions of cyclic piecewise homogeneous variations of the temperature of ambient media, we study the influence of the conditions of thermal cyclic loading on the thermal stressed state of the system.
Article
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One of the main drawbacks of the current flexible devices is the lack of a thin-film encapsulation with superior moisture barrier performance, light transmittance and mechanical flexibility. In this study, an inorganic/organic/inorganic composite film was fabricated on a 10 cm × 10 cm polyethylene naphthalate (PEN) substrate, which consisted of two...
Article
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External cavity quantum cascade lasers (EC-QCLs) utilizing the Littrow configuration and operating at an approximate wavelength of 8.5 μm have been successfully demonstrated in continuous wave operations at room temperature. Our work provides ideas and experimental support for the optimization of the EC-QCL which indicate optimal EC-QCL performance...
Article
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Resumo Esta pesquisa teve como objetivo avaliar o comportamento reológico de argamassas de revestimento mista (traço 1:1:6, cimento:cal:areia, em volume), industrializada e estabilizada, quando aplicadas sobre diferentes substratos. As argamassas foram caracterizadas no estado fresco e seu comportamento reológico foi avaliado pelo método squeeze-fl...
Article
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Resumo As manifestações patológicas encontradas nas estruturas de alvenaria em regiões de atmosfera marinha têm a umidade e os sais solúveis como os principais agentes de deterioração dos materiais de construção. Dentre as diversas técnicas e materiais utilizados para a recuperação dessas estruturas, tem-se a execução de revestimentos com argamassa...
Article
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Lead halide perovskites (LHP) are solution‐processable semiconductor materials with high optical gain and broad wavelength tunability, making them well‐suited for laser applications. Here, a solution‐based method for the 3D conformal coating of LHP microcrystals with noble metals is presented. A nanoscale metal coating layer is found to significant...
Article
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We address a non-destructive testing of bitumen insulations. A new approach to its in situ monitoring is proposed. It is based on single impact microindentation. To describe the straining process of a bitumen coating, we analyzed Maxwell and Voigt rheological models. It is shown experimentally that Maxwell model suits well for this task. Temporal c...
Article
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Na concepção de projetos de estruturas metálicas, o aço‐carbono é amplamente preferido devido à sua resistência mecânica e versatilidade. Contudo, sua elevada suscetibilidade à corrosão atmosférica pode comprometer prematuramente a durabilidade e a segurança das estruturas, caso não sejam adotadas medidas de proteção adequadas. Para essa proteção,...
Article
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We propose what we believe to be a novel interconnection technique between single-mode fiber (SMF) and nested anti-resonant node-less fiber (NANF), using a coreless fiber (CLF) melted micro-ball lens for mode field matching. The ball lens is fabricated by melting a section of the CLF, while the remaining portion provides an air gap for beam expansi...