Готові списки джерел за темами / Coating fabrication technique

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Добірка наукової літератури з теми "Coating fabrication technique"

Автор: Grafiati

Опубліковано: 10 січня 2023

Оновлено: 28 січня 2023

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Статті в журналах з теми "Coating fabrication technique"

Renner, Peter, Ajinkya Raut, and Hong Liang. "High-Performance Ni-SiC Coatings Fabricated by Flash Heating." Lubricants 10, no. 3 (March 14, 2022): 42. http://dx.doi.org/10.3390/lubricants10030042.

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In this research, a novel flash heating coating application technique was utilized to create Ni-SiC coatings on carbon steel substrates with SiC contents much higher than is achievable using certain conventional coating techniques. Hardness profiles showed that the coatings improved the substrate by as much as 121%, without affecting the substrate. Tribotests showed that the wear performance was improved by as much as 4.7× in terms of the wear rate (mm3/N·m) for the same coating when using an Al2O3 counterpart. Pure SiC coatings as a reference were also fabricated. However, the SiC coatings experienced elemental diffusion of Fe from the carbon steel substrate into the coating during fabrication. This occurred due to the increased heat input required for pure SiC to fuse to the substrate compared to the Ni-SiC coatings and resulted in decreased tribological performance. Diffusion of Fe into the coating weakened the coating’s hardness and reduced the resistance to wear. It was concluded that ceramic–metallic composite coatings can successfully be fabricated utilizing this novel flash heating technique to improve the wear resistance of ceramic counterparts.

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Algailani, Hiba M., Adel K. Mahmoud, and Hanaa A. Al-Kaisy. "Fabrication of Ni-ZrO2 Nanocomposite Coating by Electroless Deposition Technique." Engineering and Technology Journal 38, no. 5A (May 25, 2020): 649–55. http://dx.doi.org/10.30684/etj.v38i5a.491.

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This work aims preparation of Ni-based nanocomposite coating by electroless deposition method onto stainless steel (316L) substrate, the present work will compare the effects of incorporation of ZrO2 nanoparticles at different percentages (1.25 wt %, 2.25 wt %, and 4.25 wt %) Ni-based electroless deposition coating of the bath nanocomposite on the phase structure, microhardness, and corrosion resistance is studied. Where the structure and chemical composition of nanocomposite coatings were studied by using (X-ray), (SEM) and (EDS). of Ni - ZrO2 nanocomposite coating exhibits much-increased microhardness and remarkably improved corrosion resistance.

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Monceau, Daniel, Djar Oquab, Claude Estournès, Mathieu Boidot, Serge Selezneff, and Nicolas Ratel-Ramond. "Thermal Barrier Systems and Multi-Layered Coatings Fabricated by Spark Plasma Sintering for the Protection of Ni-Base Superalloys." Materials Science Forum 654-656 (June 2010): 1826–31. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1826.

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Aeronautic gas turbine blades, vanes and combustion chambers are protected against high temperature oxidation and corrosion by single or multilayered coatings. These include environmental coatings, generally based on Pt-modified Ni aluminides or MCrAlY overlays (where M = Ni and/or Co), thermal barrier coating (TBC) systems including a ceramic thermally insulating layer, and abradable seals. The present work shows the ability of the Spark Plasma Sintering technique to rapidly develop new coatings compositions and microstructures. This technique allows combining powders and metallic foils on a superalloy substrate in order to obtain multilayered coatings in a single short production step. Fabrication of MCrAlY overlays with local Pt and/or Al enrichments is shown, as well as fabrication of coatings made of -PtAl2, -PtAl, α-AlNiPt2, martensitic and (Ni,Pt)Al or Pt-rich ’ phases, including their doping with reactive elements. The fabrication of a complete TBC system with a porous and adherent Yttria Stabilized Zirconia (YSZ) layer on a bond-coating is also demonstrated, as well as the fabrication of a CoNiCrAlY-based cermet coating for abradable seal application. Difficulties of fabrication are reviewed, such as Y segregation, risks of carburization, local over-heating, or difficulty to coat complex shaped parts. Solutions are given to overcome these difficulties.

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Liu, Xinqian, Stephen Veldhuis, Ritch Mathews, and Igor Zhitomirsky. "Poly(ethyl methacrylate) Composite Coatings Containing Halogen-Free Inorganic Additives with Flame-Retardant Properties." Journal of Composites Science 6, no. 4 (March 28, 2022): 104. http://dx.doi.org/10.3390/jcs6040104.

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This investigation is motivated by the need for the development of polymer coatings containing inorganic flame-retardant materials (FRMs) and the replacement of toxic halogenated FRMs. A green strategy is reported for the fabrication of poly(ethyl methacrylate) (PEMA)-FRM composite coatings using a dip-coating method. The use of water-isopropanol co-solvent allows the replacement of regular toxic solvents for PEMA. The abilities to form concentrated solutions of high-molecular-mass PEMA and to disperse FRM particles in such solutions are the main factors in the fabrication of coatings using a dip-coating technique. Huntite, halloysite, and hydrotalcite are used as advanced FRMs for the fabrication of PEMA-FRM coatings. FTIR, XRD, SEM, and TGA data are used for the analysis of the microstructure and composition of PEMA-FRM coatings. PEMA and PEMA-FRM coatings provide corrosion protection of stainless steel. The ability to form laminates with different layers using a dip-coating method facilitates the fabrication of composite coatings with enhanced properties.

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Chen, Chien-Chih, and Chen-Ching Ting. "Photoelectrode Fabrication of Dye-Sensitized Nanosolar Cells Using Multiple Spray Coating Technique." International Journal of Photoenergy 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/629059.

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This paper presents a spray coating technique for fabricating nanoporous film of photoelectrode in dye-sensitized nanosolar cells (DSSCs). Spray coating can quickly fabricate nanoporous film of the photoelectrode with lower cost, which can further help the DSSCs to be commercialized in the future. This paper analyzed photoelectric conversion efficiency of the DSSCs using spray coated photoelectrode in comparison with the photoelectrode made with the doctor blade method. Spray coating can easily control transmittance of the photoelectrode through the multiple spray coating process. This work mainly used a dispersant with help of ultrasonic oscillation to prepare the required nano-TiO2solution and then sprayed it on the ITO glasses. In this work, a motor-operated conveyor belt was built to transport the ITO glasses automatically for multiple spray coating and drying alternately. Experiments used transmittance of the photoelectrode as a fabrication parameter to analyze photoelectric conversion efficiency of the DSSCs. The influencing factors of the photoelectrode transmittance during fabrication are the spray flow rate, the spray distance, and the moving speed of the conveyor belt. The results show that DSSC with the photoelectrode transmittance of ca. 68.0 ± 1.5% and coated by the spray coating technique has the best photoelectric conversion efficiency in this work.

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Oquab, Djar, Daniel Monceau, Yannick Thebault, and Claude Estournès. "Preliminary Results of the Isothermal Oxidation Study of Pt-Al-NiCoCrAlYTa Multi-Layered Coatings Prepared by Sparks Plasma Sintering (SPS)." Materials Science Forum 595-598 (September 2008): 143–50. http://dx.doi.org/10.4028/www.scientific.net/msf.595-598.143.

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MCrAlY coatings (where M = Co, Ni or Co/Ni) are widely used on turbine blades and vanes as oxidation and corrosion resistant overlays or as a bond-coating in thermal barrier coatings systems. MCrAlY are usually fabricated by Plasma Spraying, Physical Vapour Deposition, High Velocity Oxy-Fuel spraying or electrolytic techniques. The use of emergent Spark Plasma Sintering technique as a preparation method for NiCoCrAlYTa coatings has been presented previously [1]. SPS technique allows fast development of new coatings with a one-step fabrication of multilayered coatings. This work presents first results of the long term isothermal oxidation behaviour of Pt-Ni aluminide/NiCoCrAlYTa multi layered coatings. The obtained coating is dense and homogeneous. Isothermal oxidation up to 500 h at 1100°C leads to the formation of an adherent alumina scale with Y-rich precipitates and deep intergranular oxidation.

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Manna, Srikrishna, Milan Kanti Naskar, and Samar Kumar Medda. "Mesoporous silica-based abrasion resistant antireflective (AR)-cum-hydrophobic coatings on textured solar cover glasses by a spray coating technique." Materials Advances 3, no. 7 (2022): 3208–17. http://dx.doi.org/10.1039/d1ma01141c.

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The present work describes the fabrication of functionalized mesoporous silica based antireflective-cum-hydrophobic coatings on textured solar cover glasses via a spray-coating technique exhibiting enhanced photo-current density.

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Togan, Valentin-Cristian, Gheorghe Ionita, and Iulian Vasile Antoniac. "Corrosion Behavior of Ti6Al4V Coated with SiOx by PECVD Technology." Key Engineering Materials 583 (September 2013): 22–27. http://dx.doi.org/10.4028/www.scientific.net/kem.583.22.

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This paper aims to present the mechanism of PECVD SiOx coating thin layer technology on biomaterials, such as Ti and its alloys, with reference to the available literature. The thin organosilan coating surface will be analyzed by SEM technique and the corrosion behavior by EIS technique. The study shows that plasma-assisted fabrication allows us to prepare dense, homogeneous and high adherent coatings and thereby, will improve the corrosion resistance.

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Journal, Baghdad Science. "Variables Affecting Developments of Hydroxyapatite Coating by Using Electrophoretic Deposition Technique." Baghdad Science Journal 5, no. 3 (September 7, 2008): 423–26. http://dx.doi.org/10.21123/bsj.5.3.423-426.

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Electrophoretic Deposition (EPD) process offers various advantages like the fabrication of the ceramic coatings and bodies with dense packing, good sinterability and homogenous microstructure. The variables namely (applied potential, deposition time and sintering temperature) affected the development of hydroxyapatite (HAP) coatings. The coating weight and thickness were found to increase with the increase in applied potential or coating time. Sintering temperature was found to affect in change phases of the metal, furthermore the firing shrinkage of the HAP coating on a constraining metal substrate leads to serve cracking. XRD Characterization indicates the formation of a contamination free phase pure, and the optical micrographs show the relatively uniform distribution of the HAP coatings. Analysis of the stiochiometric HAP before EPD process and after sintering indicates that the structural aspects do not change i.e. the EPD in ethanol does not affect the structure of HAP powder.

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HE, YEDONG, KUN ZHANG, LIANGJIAN LI, and DEREN WANG. "NANO-/MICRO-COMPOSITE CERAMIC COATINGS PREPARED BY THERMAL PRESSURE FILTRATION OF SOL-GEL PAINTS." International Journal of Modern Physics B 20, no. 25n27 (October 30, 2006): 4649–54. http://dx.doi.org/10.1142/s0217979206041835.

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A novel coating technique, thermal pressure filtration of sol-gel paints (TPFSP), has been developed to prepare nano-/micro-composite ceramic coatings with controllable thickness, structure, and excellent high temperature properties. In this paper, the fabrication of two typical coatings, nano-/micro- Al 2 O 3- Y 2 O 3 composite coating and Al 2 O 3· SiO 2 fibers reinforced nano- ZrO 2-8wt.% Y 2 O 3 composite coating was demonstrated and their structures and properties were studied.

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Більше джерел

Дисертації з теми "Coating fabrication technique"

Zareian-Jahromi, Mohammad Amin. "MEMS-Based Micro Gas Chromatography: Design, Fabrication and Characterization." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33433.

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This work is focused on the design, fabrication and characterization of high performance MEMS-based micro gas chromatography columns having wide range of applications in the pharmaceutical industry, environmental monitoring, petroleum distillation, clinical chemistry, and food processing. The first part of this work describes different approaches to achieve high-performance microfabricated silicon-glass separation columns for micro gas chromatographic (ÂµGC) systems. The capillary width effect on the separation performance has been studied by characterization of 250 Âµm-, 125 Âµm-, 50 Âµm-, and 25 Âµm-wide single-capillary columns (SCCs) fabricated on a 10Ã 8 mm2 die. The plate number of 12500/m has been achieved by 25 Âµm-wide columns coated by a thin layer of polydimethylsiloxane stationary phase using static coating technique. To address the low sample capacity of these narrow columns, this work presents the first generation of MEMS-based â multicapillaryâ columns (MCCs) consisting of a bundle of narrow-width rectangular capillaries working in parallel. The second contribution of this work is the first MEMS-based stationary phase coating technique called monolayer protected gold (MPG) for ultra-narrow single capillary (SCC) and multicapillary (MCC) microfabricated gas chromatography (Î¼GC) columns yielding the highest separation performance reported to date. This new Î¼GC stationary phase has been achieved by electrodepositing a uniform functionalized gold layer with an adjustable thickness (250nm-2Âµm) in 25Î¼m-wide single columns as well as in four-capillary MCCs. The separation performance, stability, reproducibility and bleeding of the stationary phase have been evaluated over time by separating n-alkanes as non-polar and alcohols as polar gas mixtures.
Master of Science

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Sahare, Swapnil Ashok. "Enhancing the Photovoltaic Efficiency of a Bulk Heterojunction Organic Solar Cell." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1609.

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Active layer morphology of polymer-based solar cells plays an important role in improving power conversion efficiency (PCE). In this thesis, the focus is to improve the device efficiency of polymer-based solar cells. In the first objective, active layer morphology of polymer-solar cells was optimized though a novel solvent annealing technique. The second objective was to explore the possibility of replacing the highly sensitive aluminum cathode layer with a low-cost and stable alternative, copper metal. Large scale manufacturing of these solar cells is also explored using roll-to-roll printing techniques. Poly (3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl (PCBM) were used as the active layer blend for fabricating the solar cell devices using bulk heterojunction (BHJ), which is a blend of a donor polymer and an acceptor material. Blends of the donor polymer, P3HT and acceptor, PCBM were cast using spin coating and the resulting active layers were solvent annealed with dichlorobenzene in an inert atmosphere. Solvent annealed devices showed improved morphology with nano-phase segregation revealed by atomic force microscopy (AFM) analysis. The roughness of the active layer was found to be 6.5 nm. The nano-phase segregation was attributed to PCBM clusters and P3HT domains being arranged under the solvent annealing conditions. These test devices showed PCE up to 9.2 % with current density of 32.32 mA/cm2, which is the highest PCE reported to date for a P3HT-PCBM based system. Copper was deposited instead of the traditional aluminum for device fabrication. We were able to achieve similar PCEs with copper-based devices. Conductivity measurements were done on thermally deposited copper films using the two-probe method. Further, for these two configurations, PCE and other photovoltaic parameters were compared. Finally, we studied new techniques of large scale fabrication such as ultrasonic spray coating, screen-printing, and intense pulse light sintering, using the facilities at the Conn Center for Renewable Energy Research at the University of Louisville. In this study, prototype devices were fabricated on flexible ITO coated plastics. Sintering greatly improved the conductivity of the copper nano-ink cathode layer. We will explore this technique’s application to large-scale fabrication of solar cell devices in the future work.

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CHEN, PO-HUNG, and 陳柏宏. "Fabrication of highly transparent films with excellent near-infrared shielding properties by wet-coating technique." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/smq59v.

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Анотація:

碩士
國立雲林科技大學
化學工程與材料工程系
105
Near infrared (NIR, wavelength: 780~2500 nm) shielding materials have been widely applied in the windows of cars and buildings. In summer, the visible light can pass through the transparent, NIR shielding layers but NIR not. Thus, the heat can’t transfer into the indoor, reducing the energy consumption for air conditions and release of carbon dioxide. In this study, the Cs0.33WO3 nanorods were synthesized by the hydrothermal method and used as NIR shielding materials. The performance of NIR shielding through incorporating polymer into the Cs0.33WO3 layer was discussed. Experimental results showed that the polyvinylpyrrolidone (PVP) incorporation could change significantly the transmittance in the visible region, but not deteriorate NIR shielding. The visible transmittance decreased with increasing the concentration of PVP incorporation but increased with further increasing that. Until the PVP cover completely the Cs0.33WO3 layer, the visible transmittance can increase from 80% to 92%.

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Carvalho, Andreia Filipa Garcia de. "Comprehend the Optical, Morphological, and Electrical Characteristic of Air Processed Polymer Solar Cells." Master's thesis, 2021. http://hdl.handle.net/10362/136008.

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Solar energy via photovoltaic (PV) is a promising and freely accessible energy source that has become the main route for managing long term challenges in the energy crisis. Organic solar cells (OSCs) have raised interest in the scientific community due to their enormous potential in solar industry such as mechanical flexibility, exceptional processability, and capability of large-area roll-to-roll (R2R) manufacturing. In this work, we emphasize to understand the correlation between optical (absorbance and photoluminescence) and morphology properties of air processed photoactive layer, which are prepared at different spin-speeds (800 rpm, 1000 rpm, 1200 rpm, and 1500 rpm) and PC61BM concentration (1.0:0.6, 1.0:0.8 and 1.0:1.0 ratios) and its influence on the performance of OSCs devices. Here, OSCs devices have been fabricated in an inverted bulk heterojunction (BHJ) device configuration viz. sputtered Indium Thin Oxide (sITO)/Zinc oxide (ZnO)/P3HT:PC61BM/ Molybdenum trioxide (MoO3)/Silver (Ag). The sITO, ZnO, MoO3, and Ag were introduced as a transparent cathode electrode, electron transport layer (ETL), hole transport layer (HTL), and an anode electrode, respectively. The blend of regioregular poly(3-hexylthiophene-2,5-diyl) (rrP3HT), donor polymer, and [6,6] phenylC61-butyric acid methyl ester (PC61BM), acceptor molecule, is employed as a photoactive layer in the proposed devices. All the samples (for optical and morphological measurements) and solar cell devices were prepared via spin-coating technique without controlling the atmospheric conditions. A thin interface layer of MoO3 (10 nm, 0.2-0.5 Å/sec) and anode electrode (Ag, ≈ 150 nm, 1.5 Å/sec) were both deposited, sequentially, on the photoactive layer using thermal evaporation with a vacuum of 10-6 Torr. The photovoltaic performance parameters were explored by using current-voltage (J-V) characteristics. Furthermore, electrochemical impedance spectroscopy (EIS) was used to generate an electrical model for the extraction of charge transport parameters of air processed OSCs devices such as the chemical capacitance (Cμ), effective lifetime (τn), diffusion time (τd) and charge carrier mobility (μ). Additionally, the long-term stability of the produced photovoltaic devices is reported.
A energia solar fotovoltaica é uma fonte promissora e acessível de energia que se tornou a rota principal para a gestão dos desafios impostos pela crise energética a longo termo. As Células Solares Orgânicas (CSOs) captaram o interesse da comunidade científica devido ao seu enorme potencial industral como a sua flexibilidade mecânica, o processamento exceptcional e a capacidade de produção roll-to-roll (R2R) a larga escala. Neste trabalho, deu-se ênfase à correlação entre as propriedades óticas (absorbância e fotoluminescência) e morfológicas das camadas activas processadas em atmosfera aberta, as quias preparadas a diferentes spin-speeds (800rpm, 1200rpm, 1500rpm), possuem diferentes concentrações de PC61BM (a 1.0:0.6, 1.0:0.8 e 1.0:1.0 proporções) e a sua influência na performance das CSOs. Aqui, as CSOs foram fabricadas numa configuração de dispositivo invertida baseda no principio de heterojunção (BHJ). O Óxido de Indio Estanho (ITO), preparado pela técnica Sputtering RF, sITO/Óxido de Zinco (ZnO)/P3HT:PC61BM/ Tróxido de molibdénio (MoO3)/Prata (Ag). sITO, ZnO, MoO3, e Ag foram introduzidos como cátodo (electrodo) transparente, camada transportadora de eletrões (ETL), camada de transportadora de buracos (HTL) e ânodo (electrodo), respetivamente. A mistura de regioregular poli (3-hexiltiofeno) (rrP3HT), polímero doador, e [6,6]-fenil-C61-ácido butírivo-metil ester (PC61BM), a molécula aceitadora, foi utilizada como camada ativa nos dispositivos propostos. Todas as amostras (para as avaliações óticas e morfológicas) e as células solares foram preparadas através da técnica de spin-coating , sem controlo das condições atmosféricas. Uma interface fina de MoO3 (10 nm, 0.2-0.5 Å/sec) e um ânodo (elétrodo) (Ag, ≈ 150 nm, 1.5 Å/sec) foram ambos depositados, sequencialmente, na camada activa através da sua evaporação térmica a vácuo de 10-6 Torr. Os parâmetros de performance fotovoltaica foram explorados através das curvas caracteristicas J-V. Além disso, a espectroscopia de impedância eletroquímica (EIS) foi utilizada para gerar um modelo elétrico para a extracção dos parâmetros de transporte de carga de dispositivos solares processados em atmosfera aberta, tais como capacitância química (Cμ), tempo de vida efetivo (τn), tempo de difusão (τd) e mobilidade global (μ). Adicionalmente a estabilidade de longo-termo das células produzidas é reportada.

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MAO, HAO-SHENG, and 毛皓陞. "Fabrication of High Sensitivity D-Shaped Fiber Sensors By Using Optical Coating Techniques." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/38689446621489755000.

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Анотація:

碩士
逢甲大學
電機工程學系
105
In our study, we combined the optical coating(ITO, IGZO and MgF2) and the side-polished techniques to manufacture high sensitivity fiber sensors.D-shaped structure fibers were polished by a homemade side-polished machine.A real-time monitoring system was used to control the degree of polishing depth, and the thin-film was coated on the surface of D-shaped fiber by RF magnetron sputtering and thermal evaporationmethods. The sensing mechanism was based on lossymode　resonance (LMR) phenomenon, when the environmental media was changed, the resonance wavelength was also changed. 　When the real part of the permittivity of thin film is positive and higher than both imaginary part and real part of the permittivity of the surrounding medium and the resonance must satisfy two conditions: mode field substantial overlap and phasematching.The results show that the proposed D-shaped fiber sensors coated with ITO thin films used in three different LMR sensing experiments, the maximum sensitivity is 50.1 nm/M for salinity sensing, 44.4 nm/pH for sensing acidic aqueous solution,53.3 nm/pH for sensingalkaline aqueous solutions, and 2.5 nm/RH% for relative humidity (40-85%RH )sensing.

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Faiz, Fairuza. "Detection of Perfluoroalkyl Compounds with Polyvinylidene Fluoride Coated Optical Fibre." Thesis, 2019. https://vuir.vu.edu.au/40594/.

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Анотація:

Perfluoroalkyl substances (PFAS) are a class of man-made chemicals with many uses from fire-fighting foams to surface coatings and other industrial applications. In recent years, PFAS have gained considerable attention within the scientific community and the global media alike. Due to their strong chemical bonds, PFAS are inherently non-biodegradable and therefore persist in the environment. Listed in the Stockholm Convention of Persistent Organic Pollutants, these chemicals have been linked to various health issues in both humans and animals, lately, which are resulting in millions of dollars’ worth of expenses in health care and compensation for the governments of affected countries every year. In addition, the cost of cleaning up PFAS from the environment along with these human costs exceeds $50 billion in Europe alone. There is an urgent need for a portable sensing system to detect PFAS in the environment, including the most common types, perfluorooctanoic acid (PFOA) and perfluorooctane sulphonate (PFOS). At present, the methods available to accurately measure the concentration of PFAS in contaminated samples involve field sampling followed by laboratory-based, time consuming analytical techniques, such as liquid/gas chromatography and tandem mass spectrometry that are unsuitable for real-time field measurements. Existing portable systems have not yet attained the precision of the analytical methods and face challenges in field tests due to various limitations, including lack of specificity, cross sensitivity to environmental conditions and generation of toxic waste. Therefore, this research has focused on providing a proof of principle of a Fabry- Perot Interferometry (FPI) based optical fibre sensor for in situ detection of PFOA in aqueous solution. It has aimed at characterizing the potential of the envisioned PFAS sensing technique to obtain accurate and real time measurements. The proposed research capitalised on the numerous practical advantages offered by optical fibre sensors and the ability of an integrated polyvinylidene fluoride (PVDF) coating at the fibre end-face to respond to the presence of PFOA. To the best of the author’s knowledge, PVDF was experimentally shown to respond to the emerging contaminants for the first time in this work. A novel approach of forming a thin PVDF film (or Fabry-Perot etalon) on an optical fibre end-face was developed and thoroughly characterized. The thermoplastic polymer PVDF, known for its many useful characteristics such as hydrophobicity, corrosion resistance and ferroelectricity, was considered a robust sensor material based on its performance related to water filtration membranes and other engineering applications. This work has reported the synthesis of optimized coating on optical fibres through the immersion precipitation technique and has discussed subsequent experiments with the fabricated PFAS detector that demonstrated reproducible changes in the FPI spectrum in the presence of PFOA. Successful detection of analytes or their change in concentration was denoted by spectral shifts on the obtained FPI reflection spectra. A variation in the optical path difference (OPD) determined through numerical modelling provided a measure of sensitivity of the FPI based system to the different PFOA solutions. Analytical tests confirmed that PVDF adsorbs PFOA by measuring the concentration of PFOA in solution before and after a PVDF film was immersed for several hours. Visual evidence in the form of scanning electron microscopic images also displayed differences in the surface structures of PVDF thin films that were exposed to PFOA. These results supported the inference that the changes in OPD were due to the adsorption of PFOA on the PVDF coated optical fibre. In addition to the solutions containing known amounts of PFOA, real industrial solutions containing residual fire-fighting foam from fire trucks were tested and showed successful detection at low levels. In this case, the solutions contained a mixture of PFOA and PFOS with a range of other PFAS compounds that are typically used in these foam formulations. Further investigation involving alternative optical methods employing refractive index- based measurement utilizing an etched fibre Bragg grating (EFBG) and also a bare optical fibre, showed spectral response to change in PFOA concentration in solution. A shift in the EFBG spectrum due to change in PFOA concentration in the solution in which PVDF membranes had been soaked indicated that the analyte was adsorbed by the polymer. Similarly, a change in the reflection intensity of the signal obtained by a bare fibre end-face in the PFOA solution due to a change in its refractive index, indicated the adsorption of the fluoro surfactant on the PVDF thin film. Following the confirmation of PFOA uptake by PVDF, functionalization of the polymer was also investigated, which revealed that the incorporation of zeolites into PVDF enables more PFOA from aqueous solution to be adsorbed onto the thin film. Fourier transform infrared spectroscopy was used to highlight structural differences in the doped coatings, whereas energy dispersive x-ray spectroscopy was used to show compositional differences between the doped and non-doped PVDF thin films. Thus, this research contributed to the prospect of developing a functionalized sensor for more efficient detection of PFAs while also creating opportunities for further research in water treatment. A temperature characterization test, which was undertaken to eliminate possible signal cross-sensitivity effects, also indicated that the PVDF coated fibre can be considered for thermometric applications due to its good repeatability and linearity of the measurements over a specified temperature range. More importantly, information gathered from the undertaken characterization test was used to optimize the PFOA sensing protocol in order to obtain reliable results. This research has provided experimental evidence to support that a PVDF coated optical fibre can be used as a potential portable PFAS detector. It has demonstrated a novel and simple thin film fabrication and optimization process for selective detection of the emerging contaminant PFOA. Furthermore, by combining an interferometry type optical fibre sensing technology with aqueous PFAS detection this research has established the foundation for future studies that can lead to commercialisation of a portable PFAS sensor for wide-ranging environmental and engineering applications.

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Частини книг з теми "Coating fabrication technique"

Mishra, Prabhash, Neha Tabassum, Choksh Bhola, Vaibhav Sharma, Kamran Zaidi, Manish Gupta, Harsh, and S. S. Islam. "Fabrication of SWCNTs Based Flexible, Trace Level NO2 Gas Sensor Using Spray Coating Technique." In Physics of Semiconductor Devices, 669–70. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03002-9_171.

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Muirhead, I. T., K. L. Lewis, A. M. Pitt, N. G. Chew, A. G. Cullis, T. J. Wyatt-Davies, L. Charlwood, and O. D. Dosser. "Fabrication of Optical Coatings Using Ultra-High Vacuum Techniques." In Laser/Optoelektronik in der Technik / Laser/Optoelectronics in Engineering, 470–77. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-83174-4_95.

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Carmagnola, Irene, Giulia Giuntoli, and Gianluca Ciardelli. "Methods and Materials for Drug Eluting Urinary Stents Design and Fabrication." In Urinary Stents, 415–26. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04484-7_32.

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AbstractAfter urinary stenting, patients often suffer from mid- and long-term complications, such as infections, bacterial colonization, encrustations, or stent obstruction which are related to the design, materials and surface properties of the stent. Drug eluting stents (DES) is an advance technology that can reduce the morbidity associated with stenting, by locally releasing loaded drugs in a time-controlled manner. In this chapter is firstly reported an overview of the materials and manufacturing methods for conventional urinary stents, then are discussed the engineered strategies for the design and fabrication of drug eluting stents. Drug eluting ureteral stents, and in general urinary stents, were introduced to performed a drug delivery aiming to obtain a local treatment as well as to overcomes the main issues related to urinary stenting implantation. Drugs and/or active agents can be directly loaded in the stent structure or can be introduced through a surface coating. Drug-eluting technologies can then be combined with biodegradable stents in order to eliminate the need for stent removal procedure. However some disadvantages remain still unsolved. In the last decades innovative manufacturing approaches and methods, such as nanotechnologies and additive manufacturing techniques, provide to scientists new tools for the design and fabrication on smart and custom-made urinary stents, able to go towards perfectly to patient needs.

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Marken, K. R., W. Dai, and S. Hong. "Fabrication of BSCCO-2212 Composite Conductors by Dip Coating and Powder-in-Tube Techniques." In Advances in Cryogenic Engineering Materials, 147–51. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4757-9053-5_20.

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S. Bhat, Ramesh. "Fabrication of Multi-Layered Zn-Fe Alloy Coatings for Better Corrosion Performance." In Liquid Metals [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99630.

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Zn-Fe compositionally modulated multilayer alloy (CMMA) coatings were developed onto low carbon steel from acid sulphate bath; and their corrosion resistance was calculated using Tafel polarization and impedance methods. The deposit layers were formed galvanostatically by single bath technique (SBT), using square current pulses. An optimal configuration for the growth of most corrosion resistant Zn-Fe coating was proposed and discussed. At maximum switching cathode current density (SCCD) (2.0–5.0 A dm−2), the deposit with 300 layers showed ~43 times superior corrosion resistance than the same thickness of monolayer coating. The improved corrosion resistance of multilayered coatings is due to small change in iron content, leading to change the phase structure of the alternate-layers of the alloy coatings. The surface morphology and structure of film and roughness of the deposit were assessed using Scanning Electron Microscopy and Atomic Force Microscopy. Thus, superior corrosion resistance of Zn-Fe multilayer coatings was used for industrial applications including defense, machinery and automobile etc.

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Prashar, Gaurav, and Hitesh Vasudev. "Application of Thermal Spraying Techniques Used for the Surface Protection of Boiler Tubes in Power Plants." In Advanced Surface Coating Techniques for Modern Industrial Applications, 112–34. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4870-7.ch005.

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Distinct methods of depositing the coatings are available according to the intended area of application with a sole objective to protect the surface of structural component like boiler, boiler tubes, and heat exchangers from any mechanical or chemical damage. The main benefit is to minimize the manufacturing cost of a new component and also its fabrication. Thermal spraying is the commonly used technique to tailor the surface properties with a cost-effective approach. The different techniques of thermal spraying such as plasma, HVOF, cold spraying, etc. were investigated and introduced. Although each of these processes has advantages, there are also certain disadvantages associated with them, which limit their application. In the chapter, different methods of depositing coating by thermal spray are discussed and compared. By developing advanced techniques and new coating materials, the life and efficiency of power plants can be enhanced in the future.

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Miguel Antonio, Domínguez-Crespo, Brachetti-Sibaja Silvia, Torres-Huerta Aidé, Onofre Edgar, López-Oyama Ana, and Rodil Sandra. "Corrosion Protective Coatings: Fabrication of Sputtered CeO2-La2O3 and La2O3-CeO2 Bilayers." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000216.

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This entry provides a comparative study on the corrosion protection efficiency of Ce, La films as well as Ce/La- and La/Ce-bilayered coatings deposited onto AA7075 and AA6061 substrates by the radio frequency magnetron sputtering technique. The coating thickness ranged from ~12 to 835 nm, which changed with the deposition parameters and substrate composition. The relationship between microstructure, roughness, and electrochemical performance is examined. The reactivity and crystallinity of rare earth (RE) films can be tailored by adjusting the sputtering parameters. Sputtered La films with a thickness of ~390 nm and an average roughness of 66 nm showed the best corrosion protection properties in chloride medium as determined by potentiodynamic curves and electrochemical impedance spectroscopy. The method to obtain RE-bilayered coatings, i.e., La/Ce or Ce/La as well as the substrate composition and applied power, conditioned their inhibition properties. The RE-bilayered coatings displayed better barrier properties than Ce films, which were worser than those featured by La films.

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Tufail Chaudhary, Kashif. "Thin Film Deposition: Solution Based Approach." In Thin Films [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.94455.

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The wet chemical processing opens the way to deposit thin film with the versatility and ease for a variety of materials. Liquid film deposition involves the application of a liquid precursor on a substrate which is then converted to the required coating material in a subsequent post-treatment step. Different non-vacuum solution based deposition techniques have been developed to grow thin films with high efficiency and functionality. Spin coating is one of an effective technique for thin film fabrication due to low cost, uniformity, less hazardous, and capability of easy scaling up. The typical process involves depositing a small amount of a fluid onto the center of a substrate and then spinning the substrate at high speed. Dip coating is another simple, cost effective route with feasibility to scale-up for commercial production. The dip coating process can be divided into three important technical stages, immersion, withdrawal and evaporation. The coating may be subjected to further heat treatment in order to burn out residual compounds and induce crystallization of the functional oxides. Spray coating is a promising technique to grow thin film in research and industry to prepare thin and thick films. It is an easy approach to fabricate thin film with uniform distribution at small scale from a few nanometers to micrometers in thickness. Inkjet printing is the emerging promising technique to develop large-scale, and flexible thin films. The inkjet printing process allow easy customization to grow variety of complex structures.

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Olaitan Kolawole, Funsho, Shola Kolade Kolawole, Luis Bernardo Varela, Adebayo Felix Owa, Marco Antonio Ramirez, and André Paulo Tschiptschin. "Diamond-Like Carbon (DLC) Coatings for Automobile Applications." In Engineering Applications of Diamond [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.95063.

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Diamond-like carbon (DLC) coatings are amorphous carbon material which exhibits typical properties of diamond such as hardness and low coefficient of friction, characterized based on the sp3 bonded carbon and structure. The proportion of sp2 (graphetically) and sp3 (diamond-like) determines the properties of the DLC. This coating can be applied to automobile engine component in an attempt to provide energy efficiency by reducing friction and wear. However, DLC coatings are faced with issues of thermal instability caused by increasing temperature in the combustion engine of a vehicle. Therefore, it became necessary to seek ways of improving this coating to meetup with all tribological requirements that will be able to resist transformational change of the coating as the temperature increases. This chapter discusses the need for diamond-like carbon coatings for automobile engine applications, due to their ultra-low friction coefficient (<0.1) and excellent wear resistance (wear rate ~ 7 x 10−17 m3/N.m). The importance of DLC coatings deposited using PECVD technique, their mechanical and tribological properties at conditions similar to automobile engines would also be discussed. Non-metallic (hydrogen, boron, nitrogen, phosphorus, fluorine and sulfur) or metals (copper, nickel, tungsten, titanium, molybdenum, silicon, chromium and niobium) has been used to improve the thermal stability of DLC coatings. Recently, incorporation of Ag nanoparticles, TiO2 nanoparticles, WO3 nanoparticles and MoO3 nanoparticles into DLC has been used. The novel fabrication of diamond-like carbon coatings incorporated nanoparticles (WO3/MoO3) using PECVD for automobile applications has shown an improvement in the adhesion properties of the DLC coatings. DLC coatings had a critical load of 25 N, while after incorporating with WO3/MoO3 nanoparticles had critical load at 32 N and 39 N respectively.

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Shahien, Mohammed. "Reactive Plasma Spray." In Production, Properties, and Applications of High Temperature Coatings, 299–332. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4194-3.ch012.

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Thermal spraying is a well-known coating technology with many variations in spraying techniques, feedstock materials and substrate materials. These unique variations increased its industrial applicability in different fields, including aerospace, automotive, chemical process, corrosion protection, and medical applications. However, one of the main limitations of thermal spray is the difficulty of depositing several nitride ceramics directly using conventional techniques. This is due to the decomposition of nitride particles under high temperature without a stable melting phase. This chapter presents reactive plasma spraying (RPS) technology as a promising solution for the in situ fabrication of several nitride ceramic coatings. The main attractive prospects of RPS for fabricating nitride coatings are specifically highlighted. Successful development of various high-temperature nitride coatings, such as AlN, Fe4N and Si3N4, are presented. Process optimization, the relationship between reaction and process parameters and the influence on coatings formation are comprehensively discussed.

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Тези доповідей конференцій з теми "Coating fabrication technique"

Vasudevan, A., S. Jung, and T. Ji. "Fabrication of Hybrid Solar Cells by Spray Coating Technique." In IASTED Technology Conferences 2010. Calgary,AB,Canada: ACTAPRESS, 2010. http://dx.doi.org/10.2316/p.2010.707-021.

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Li, Jing, Qiang Li, Huadong Yu, Yan Liu, and Feng Du. "Fabrication of biomimetic hydrophobic Ni coating by Brush plating technique." In 2015 International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO). IEEE, 2015. http://dx.doi.org/10.1109/3m-nano.2015.7425506.

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Abdalkadeer, Hiba M., Adel K. Mahmoud, and Hanaa A. Al-Kaisy. "Fabrication of Ni-MWCNTs nanocomposite coating by electroless deposition technique." In 2ND INTERNATIONAL CONFERENCE ON MATERIALS ENGINEERING & SCIENCE (IConMEAS 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000388.

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Olopade, M. A., O. E. Awe, A. M. Awobode, A. Oberafo, and M. G. Zebaze Kana. "Fabrication of Cu2ZnSnS4 thin film solar cells by the spin coating technique." In 2012 10th IEEE International Conference on Semiconductor Electronics (ICSE). IEEE, 2012. http://dx.doi.org/10.1109/smelec.2012.6417234.

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AlOmier, Abdullah, Antonia Sugar, Dongkyu Cha, Subhash Ayirala, Mohammed Alotaibi, Ali Yousef, and Hussein Hoteit. "Novel Mixed Wettability Coating: Application in Microfluidics Fabrication." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210141-ms.

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Abstract Microfluidics is an emerging technology that has gained attention by the industry for its capabilities to investigate and visualize fundamental recovery mechanisms at the pore scale in a microdevice, mimicking, to some extent, the actual rock pore-network. While current technologies are capable of building micromodels that are either water-wet or oil-wet, a technique to achieve a representative mixed-wet property is still unreached. In this work, we introduce a novel surface coating capability using thin film deposition to fabricate surfaces with selective wettability, oil-wet and water-wet, an effort to mimic actual mixed-wet rock. This unique approach enables the generation of hydrophobic surfaces in selected regions by altering the hydrophilic surface property of silicon substrate at the microscale. A selective wettability control mask and Perfluorodecyltrichlorosilane (FDTS) hydrophobic coating using molecular vapor deposition (MVD) were used for surface wetting properties alteration. Surface measurements, including contact angle measurements, X-ray photoelectron spectroscopy (XPS), and Transmission Electron Spectroscopy (TEM) imagining, were performed to evaluate the thin-film composition and morphology. By altering the wetting state of the substrate by the coated film, a selective mixed wettability surface was achieved. This technique has the potential to be utilized in microfluidic device developments. Tuning the wetting state of the substrate to mimic the mixed-wet characteristics of reservoir rocks, such as carbonates and shales, can enhance our understanding of complex fluid behaviors in porous media and provide a crucial contribution to many subsurface petroleum engineering applications such as enhanced oil recovery (EOR) and CO2 storage.

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Yang, Yang, Rifei Han, Lingyan Kong, Tianying Xiong, and Tiefan Li. "Fabrication of Ceramic Coatings by Cold-Spray in Agglomerated Y2O3 Particles." In ITSC2018, edited by F. Azarmi, K. Balani, H. Li, T. Eden, K. Shinoda, T. Hussain, F. L. Toma, Y. C. Lau, and J. Veilleux. ASM International, 2018. http://dx.doi.org/10.31399/asm.cp.itsc2018p0042.

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Abstract As a candidate material against plasma etching, yttrium oxide has been coated onto etching chamber by plasma spray technique. However, the plasma spray technique introduces undesirable coating properties such as porous structure and deleterious thermal effects. To reduce the disadvantage of thermal impact, cold spray was used as an alternative technology to deposit thick and dense yttrium oxide coatings. Primary nanoscale Y2O3 were used as the original powder, for the ceramic materials are intrinsic brittle and are difficult to be deposited by cold spray. The nano-powder were first agglomerated by hydrothermal treatment with addition of inorganic salt to acquire suitable powder for cold spray, and then deposited on aluminum alloy 6061 substrates by cold spray process with compressed air as propellant gas. About 200μm yttrium oxide coatings were formed on the substrate alloy. Different processing parameters were employed to optimize microstructure and properties of the coating.

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Sundar, M., P. Mativenga, L. Li, and P. L. Crouse. "Synthesis and coating of aluminium nitride on mild steel by combined laser sol-gel technique." In PICALO 2008: 3rd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Laser Institute of America, 2008. http://dx.doi.org/10.2351/1.5057160.

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Sta, Imen, Mohamed Jlassi, Massoud Hajji, and Hatem Ezzaouia. "Fabrication and characterization of NiO/ZnO p-n junctions by sol-gel spin coating technique." In 2012 First International Conference on Renewable Energies and Vehicular Technology (REVET). IEEE, 2012. http://dx.doi.org/10.1109/revet.2012.6195257.

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Ma, Mingxing, Jinying Zhang, Wenjin Liu, Minlin Zhong, Hongjun Zhang, and Weiming Zhang. "Influence of processing technique on practical large area metal-matrix composite coating produced by laser cladding." In PICALO 2004: 1st Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Laser Institute of America, 2004. http://dx.doi.org/10.2351/1.5056095.

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Ogbonnaya, E., A. Gunasekaran, and L. Weiss. "Fabrication of a MEMS-Based Solar Thermal Collector for Energy Sustainability." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63842.

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A micro solar thermal collector has been fabricated by chemical electrodeposition technique. The coating is made of black nickel-tin selective absorber deposited on a copper substrate. The fabrication technique is presented. The electrodeposition was performed using processes that are less hazardous than many common approaches at a near-neutral pH. The procedure was also performed at room temperature. The environmentally friendly plating procedure makes it a potential replacement for black chromium. The final coating has a dendrite crystal structure of about 100 nm in diameter. The use of this selective coating significantly improved the ability of the fabricated solar collector to convert incident radiation to thermal energy. The performance of the collector plate in a simulated solar environment was examined. An increase in the stagnation temperature of the collector of 10 °C was observed when the selective coating was applied to the base collector plate.

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Звіти організацій з теми "Coating fabrication technique"

Bilello, John C. Fabrication of High-Performance Coatings Systems via a Novel In-Situ/Ex-Situ Characterization Technique. Fort Belvoir, VA: Defense Technical Information Center, July 2001. http://dx.doi.org/10.21236/ada414044.

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