Gotowe bibliografie tematyczne / Plain Aluminide Coatings

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Gotowa bibliografia na temat „Plain Aluminide Coatings”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Plain Aluminide Coatings"

Zagula-Yavorska, M., i J. Romanowska. "The effect of precious metals in the NiAl coating on the oxidation resistance of the Inconel 713 superalloy". Journal of Mining and Metallurgy, Section B: Metallurgy, nr 00 (2022): 11. http://dx.doi.org/10.2298/jmmb220427011z.

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The rhodium incorporated aluminide coating was produced by the rhodium electroplating (0.5 ?m thick layer) followed by the chemical vapor deposition process on the Inconel 713 superalloy. This coating is composed of the ?-NiAl phase. A part of nickel atoms is replaced by rhodium atoms in the ?-NiAl phase. The plain, rhodium and platinum incorporated aluminide coatings were oxidized at 1100?C under the atmospheric pressure. The oxidation kinetics of the rhodium and platinum incorporated aluminide coatings are similar, but different than oxidation kinetic of the plain coating. The ?-Al2O3 is the main product both in rhodium and platinum modified coatings after 360 h of oxidation. Moreover, the ?-Ni3Al phase, besides the ?-NiAl phase, was identified. The presence of 4 at. % rhodium in the coating provides similar oxidation resistance as the presence of 10-20 at. % platinum. Both rhodium and platinum incorporated aluminide coatings produced by the chemical vapor deposition process offer good oxidation protection of the Inconel 713 superalloy.

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Shirvani, K., i S. V. Miraboutalebi. "Cyclic Oxidation Performance of Si-Aluminide/MCrAlY Coating on Ni-Base GTD-111 Superalloy". Materials Science Forum 889 (marzec 2017): 159–64. http://dx.doi.org/10.4028/www.scientific.net/msf.889.159.

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A slurry aluminising process was utilised to produce duplex Si-modified aluminide MCrAlY coatings for superalloy GTD-111. MCrAlY coating was applied by means of high velocity oxy-fuel (HVOF) metal spray technique. Cyclic oxidation behaviour of the aluminide/MCrAlY coating were compared with plain MCrAlY coating. Oxidation performance of the coated samples was investigated by exposing samples to 1 h cyclic oxidation at 1100 °C. Oxidation test results demonstrate the Si-aluminide/MCrAlY coating exhibited much better oxidation resistance than the the uncoated superalloy due to the superior oxidation resistance of the alumina-silica scale at 1100 °C.

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Shirvani, K., i Amir Firouzi. "Aluminide Coating Formation on Internal Passages of GTD-111 Superalloy by Slurry Technique". Materials Science Forum 595-598 (wrzesień 2008): 185–90. http://dx.doi.org/10.4028/www.scientific.net/msf.595-598.185.

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The diffusion aluminide coatings are widely used in the air-cooling passages to protect their surfaces against high temperature corrosion. In this study plain and Si-modified aluminide coatings were applied by slurry technique on internal surfaces of Ni-base GTD-111 superalloy cylindrical specimens derived from a gas turbine air-cooled blade. The slurries containing Al or Al plus Si powders were applied on internal surfaces by injection method. Then, the samples were heated to high temperature (800-1000°C) to form the coatings. Optical, SEM-EDS, and XRD were utilized for characterizing microstructures and phase compositions of the coatings. The thicknesses of applied coatings on internal surfaces were in the range of 30-50 μm that meets specifications for diffusion coatings in such application (i.e. 25-756m). The examinations demonstrated that both coating types were contained β-NiAl phase as the matrix. The uniformities of coatings applied on different surface positions of passageway were determined. In addition, the effects of time and temperature of coating process as well as mass of dried slurry on the coating thickness were also discussed.

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Trivedi, S. P., i D. K. Das. "Microstructural aspects of plain aluminide and Pt-aluminide coatings on Ti-base alloy IMI-834". Intermetallics 13, nr 10 (styczeń 2005): 1122–33. http://dx.doi.org/10.1016/j.intermet.2005.02.006.

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Omranian Mohammadi, Peiman, Ramin Raiszadeh i Hamidreza Shahverdi. "Formation of iron aluminide coatings on plain carbon steel by TIG process". International Journal of Advanced Manufacturing Technology 96, nr 5-8 (4.08.2017): 1655–63. http://dx.doi.org/10.1007/s00170-017-0797-9.

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Das, D. K., M. Roy, V. Singh i S. V. Joshi. "Microstructural degradation of plain and platinum aluminide coatings on superalloy CM247 during isothermal oxidation". Materials Science and Technology 15, nr 10 (październik 1999): 1199–208. http://dx.doi.org/10.1179/026708399101505112.

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Oki, M. "Microstructural and Compositional Characterisation of Chromate Pretreatment on Aluminium". ISRN Materials Science 2013 (24.10.2013): 1–5. http://dx.doi.org/10.1155/2013/572379.

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Chromate conversion coating developed on aluminium has been examined using SEM/EDX and CTEM/EDX with a view to having further knowledge of its intrinsic surface, plan, and sectional morphologies which will aid the understanding of their roles in improved corrosion and adhesion properties of the underlying substrate. The surface consists of spherical clusters of particulate materials. The sections, however, reveal approximately parallel, linear features which terminate at or close to the metal/coating interface, while plan views show cell-like particulate features. The coating is composed of chromium and aluminium compounds, both, probably hydrated. For a conversion coating to fully replace its chromate counterpart, most of these features may have to be replicated in the nonchromium coating material which should contain nontoxic, leachable corrosion inhibiting species.

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Baiocco, Gabriele, Silvio Genna, Erica Menna i Nadia Ucciardello. "Study on Pulse-Reverse Electroplating Process for the Manufacturing of a Graphene-Based Coating". Materials 16, nr 2 (16.01.2023): 854. http://dx.doi.org/10.3390/ma16020854.

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This work investigates the feasibility of increasing the electric conductivity of an AA1370 aluminium wire by using pulse-reverse electrodeposition to realize Cu-Graphene composite coating. The graphene adopted was in the form of nanoplates (GnP). To study the effects of plating parameters, a 23 factorial plan was developed and tested. During the tests, the following process parameters were varied: the current density, the frequency and the duty cycle. The ANalysis Of VAriance (ANOVA)) was adopted to evaluate their influence on the coated wires’ morphology and electrical conductivity resistance. The results show that all the tested conditions allow good compactness to the coating, and the amount of graphene is well incorporated within the microstructure of the copper deposit. In addition, in the best conditions, the electrical resistivity decreases up to 3.4% than the uncoated aluminum.

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Bryntesen, Silje Nornes, Odne Stokke Burheim i Jacob Lamb. "Introducing a Bio-Degradable Binder for Aqueous Production of NMC111 Cathodes". ECS Meeting Abstracts MA2022-01, nr 6 (7.07.2022): 2425. http://dx.doi.org/10.1149/ma2022-0162425mtgabs.

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The LiNixMn1-x-yCoyO2 (NMC) is a widely used cathode material in lithium-ion batteries (LIBs) due to its high capacity. By enabling water-based cathode processing, the cost and environmental impact of LIBs will be reduced substantially. However, the water compatibility of Ni-containing materials has been problematic due to lithium (Li)-leaching, corrosion of the aluminium (Al) current collector, and lack of aqueous dissoluble binders. For the first time, we demonstrated that NMC111 cathodes with comparable specific capacities to the standard polyvinylidene fluoride/N-methyl-2-pyrrolidone (PVDF/NMP)-processed cathodes can be formulated in water using lignin as binder material. Rheology measurements revealed that less solvent is needed to obtain the same slurry viscosity when replacing the NMP solvent with water. Cycling voltammetry and differential scanning calorimetry revealed that lignin is electrochemically inactive between 2.5-4.5 V and thermally stable up to 152 oC, respectively. Drying the cathode coatings at 50 oC allowed for a controlled evaporation rate as surface cracks and binder migration detected using scanning electron microscopy diminished. The lignin binder provided strong cohesion forces to the carbon black (CB) and the NMC111 particles, and the use of carbon(C)-coated Al-foil (C-Al) further increased the coating's mechanical strength. Scratch tests revealed that calendaring magnified the nature of the initial mechanical strength, intensifying a poor adhesion of the coating to the Al-foil and strong cohesion between the particles. While calendering and pore removal improved the rate performance for PVDF-cathodes (85:10:5 wt % NMC:CB:binder), the rate capability of lignin-cathodes (80:11:9 wt %) decreased with lower porosity (from 53 to 0 %) and higher mass loading (9.7 mg/cm2). Particle deformation and extensive pore-blocking at high carbon contents created a Li+-transfer barrier across the cathode/electrolyte surface, decreasing the rate performance. Cathodes using a CMC/lignin-binder mix (2:7 wt% ratio) and C-Al foil (75 % capacity retention) electrochemically outperformed those with the commercial CMC/SBR mix and plain Al-foil (35 % capacity retention) at a high C-rate (5 C). Of all the aqueous produced cathodes, the uncalendered with pure lignin-binder, C-Al foil, dried at 50 oC, and a mass loading of 7.4 mg/cm2 showed the highest capacity retention at 5 C (60 %). Additionally, the lignin-cathodes have poor electrolyte wetting abilities and need longer exposure time before cycling and additional formation cycles compared to the PVDF-cathodes. Lignin-cathodes with the smallest lignin/CB matrix (90:5:5 wt% NMC:CB:binder) wetted for 35 days with 5 formation cycles at C/10 showed similar initial discharge capacity and capacity retention (154 mAh/g and 89 %) as 85:10:5 PVDF-based cathodes (153 mAh/g and 93 %) after 100 cycles at C/2.

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Almurshedi, A., M. Atherton, C. Mares, T. Stolarski i M. Miyatake. "Influence of design embodiment on the performance of squeeze-film levitation contacts". Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 233, nr 11 (21.05.2019): 1639–47. http://dx.doi.org/10.1177/1350650119852220.

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Conveying of lightweight and delicate parts is an important issue in some manufacturing processes. Two levitation devices, one based on horn transducer (Langevin type) and the other one in the form of a plain rectangular plate made of aluminium firmly fastened at both ends with a surface-mounted piezoelectric actuator, are compared. Both devices operate on a squeeze-film levitation mechanism. To this end, physical experiments were carried out and it was found that the device utilizing horn-type transducer yields better levitation performance.

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Rozprawy doktorskie na temat "Plain Aluminide Coatings"

Tunková, Martina. "Městské lázně". Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2010. http://www.nusl.cz/ntk/nusl-215713.

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Streszczenia konferencji na temat "Plain Aluminide Coatings"

Liburdi, J., V. Moravek i P. Lowden. "LSR™ Slurry Coating Technologies". W ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0575.

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A novel slurry process has been developed for producing plain, silicon and platinum modified aluminides. The LSR™ coatings exhibit microstructures, chemistries and oxidation behaviour that are similar to the conventionally specified coatings and can be easily qualified to replace the older pack or spray technologies. The simple, compact LSR™ process makes it possible to incorporate the coating operation in new part manufacturing or repair cells and to reduce the overall cycle time or delivery.

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Conner, Jeffrey A., i Michael J. Weimer. "Coating Rejuvenation: New Repair Technology for High Pressure Turbine Blades". W ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0641.

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With the evolution of advanced directionally solidified and single crystal nickel base superalloy turbine blades, managing life cycle costs of high pressure turbine (HPT) blades has become increasingly more difficult. Today’s advanced high pressure turbine blades in aero and aero-derivative turbines feature thin walls (<.030 inches), complex internal geometries, three dimensional (3D) aerodynamic shapes, multiple protective coatings and complex film cooling schemes. A major contributor to blade life cycle cost is the ability to perform multiple repairs without compromising the integrity of these complex components. Repair of HPT blades has traditionally fallen into two categories: mini or partial repairs where blade tips are restored and coated, and full repairs where flowpath coatings are removed, blade tips restored and new coating(s) applied to flowpath surfaces. Historically, the number of full repairs allowed ranges from zero to two based on numerous design considerations, one of which is maintaining a minimum wall thickness. Removal of protective coatings during full repair reduces wall thickness which limits the number of times a full repair can be performed. Furthermore, blades that have sufficient design allowance to permit two full repairs typically have very low yields at the second full repair due to thinning of airfoil walls below minimum thickness limits. The life of a given HPT blade is therefore controlled to a large degree by at what shop visit a full repair is performed. GE Engine Services has developed a new blade repair approach — Coating Rejuvenation — which significantly extends blade life by restoring protective coatings and maintaining wall thickness. Included in the Coating Rejuvenation repair are technologies that allow: removal of physical vapor deposited (PVD) thermal barrier coatings from external surfaces and cooling holes without impacting the bond coat; removal of oxidation and corrosion products from engine exposed coatings without impacting adjacent intact coating; restoration of coating composition to optimize environmental resistance; and upgrade of existing aluminide coatings to platinum aluminide coatings without removal of the existing coating. Combined together, these technologies can be used to support a comprehensive blade repair workscope plan that dramatically increases the life of HPT blades and decreases the life cycle cost for these components. Overviews of these technologies are presented in this paper along with information on how the technology was matured. Due to pending patent applications with the US Patent & Trademark Office as well as pending patent applications in other countries, significant technical detail cannot be presented at this time.

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Sturgeon, A. J., C. Reignier, I. Laing i C. Perrin. "Development of HVOF Sprayed Aluminium Alloy Engine Bearings". W ITSC2003, redaktorzy Basil R. Marple i Christian Moreau. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.itsc2003p0825.

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Abstract Aluminium-based plain bearings for gasoline internal combustion engines are traditionally manufactured by casting and rolling, followed by forming and boring. The application places severe demands on the bearing material and a combination of properties such as fatigue, seizure and wear resistance are required. These properties are achieved by using a multi-phase material comprising of a distribution of tin in an aluminium alloy matrix. HVOF has been investigated as an alternative process for bearing manufacture and as a route to producing novel bearing materials with microstructures that cannot be achieved using the conventional casting route. The work reported describes the use of different HVOF spraying systems and powder types to develop aluminium-tin based coatings for advanced bearing applications. The coatings are described in terms of microstructure characteristics. The fatigue performance of the advanced sprayed bearings is compared with conventional cast bearings.

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Bechtle, J., H. Grateau, P. Labeye, P. Besesty i K. Petroz. "Micro scanning system for laser applications". W International Optical Design Conference. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/iodc.1998.lfd.6.

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Scanning devices are used in many laser applications. With the recent progress in miniaturizing laser sources through the application of diode pumped microchip-lasers, the miniaturization of the scanning device could lead to a great reduction in cost and size of the overall system. We developed an integrated micro-opto-electro-mechanical system (MOEMS) using electrostatic force to control the displacement of optical microlens. A monolithic structure including the microlenses and the mechanical system was etched in a silica layer on silicon substrate. Silica offers high transmission for wavelength down to the ultraviolet region and appropriate mechanical properties. The electrostatic force is applied between the electrodes of variable capacitors formed by two comb like structures one of which is fixed on the support, the other is movable and displaces the microlenses. Both are made conductive by a thin film aluminium coating. The laser beam is deflected by the lateral displacement of two converging lenses with respect to a fixed diverging lens. These lenses are cylindrical with curvature in the substrate-plan and corrected for 3rd order aberrations to decrease the distortion of the wavefront. The scanner shows a mechanical resonance frequency of about 800 Hz depending on the exact geometric of the mechanical system and a maximal scan angle of 10°. According to the application the scanner can be used at small frequencies with exact relation between voltage and scan angle, or near the resonance frequency for continous scanning driven by a much smaller voltage. Our scanner was designed for use in a microchip-laser based scanning micro range finder.

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