Results 201 to 210 of about 746,875 (274)
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Reactive spraying of nickel-aluminide coatings
Journal of Thermal Spray Technology, 1997Reactive spraying of nickel aluminides was accomplished via reaction synthesis techniques in which nickel and aluminum powders were fed through a direct- current plasma torch onto carbon steel substrates. The as- sprayed coatings obtained by reactive spraying were characterized by x- ray diffraction and microscopic techniques.
S. C. Deevi +3 more
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Aluminide Coatings on 304 Stainless Steel
CORROSION 2013, 2013Abstract USA Type 304 stainless steel coupons were aluminized at 650, 750 and 850°C for coating times in the 1-25 hour range via halide activated pack cementation. Mass gains per unit area and coating thicknesses were plotted as a function of time.
Kevin L. Smith +5 more
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, 2020
In this study, aluminide coatings were successfully synthesized on the nickel-based Inconel-600 superalloy substrates using the pack cementation method. The coatings were produced from the packs containing different amounts of Al in the range of 10 wt% -
Sina Mahini +3 more
semanticscholar +1 more source
In this study, aluminide coatings were successfully synthesized on the nickel-based Inconel-600 superalloy substrates using the pack cementation method. The coatings were produced from the packs containing different amounts of Al in the range of 10 wt% -
Sina Mahini +3 more
semanticscholar +1 more source
Protective Aluminide Coatings for Refractory Metals
Oxidation of Metals, 2016Refractory metals are promising materials for high-temperature applications. However, these materials exhibit low oxidation resistance at elevated temperatures. To overcome this problem, aluminum diffusion layers were applied to molybdenum, niobium, tantalum, and tungsten using a pack cementation process.
A. S. Ulrich, M. C. Galetz
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Role of platinum in aluminide coatings
Surface and Coatings Technology, 1991Abstract An investigation has been carried out to determine the role of platinum in aluminide coatings on selected nickel-based superalloys. Various microscopy, spectroscopy and diffraction techniques were used to characterize the microstructure. It is found that platinum improves the protective nature of the coating by (1) increasing its diffusional
H.M. Tawancy +2 more
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Eddy-Current Evaluation of Platinum Aluminide Coatings
2023 50th Annual Review of Progress in Quantitative Nondestructive Evaluation, 2023Abstract Platinum Aluminide (PtAl) diffusion coatings play an essential role in the protection of mechanical components exposed to high temperatures, such as gas turbine blades and nozzles. The formation of an adherent oxide scale inhibits substrate oxidation or hot corrosion that would otherwise lead to mechanical degradation and ...
Remo Ribichini +2 more
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High temperature oxidation of aluminide coatings
Materials Science and Engineering, 1987Abstract Fe-17Cr (where the composition is in approximate weight per cent) alloys were aluminized using the pack cementation technique. They were then oxidized at a high temperature (800–1000 °C) in O 2 ( P O 2 = 1000 mbar ). Pure α-Al 2 O 3 scales were formed. They are abnormally thich and their morphology differs from that exhibited when Fe
Z El Majid, M Lambertin
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Coating of Sic on Titanium Aluminide
MRS Proceedings, 1992Coating of silicon carbide on the surface of structural materials is being used in industry to improve the oxidation resistance and wear resistance properties. In this study, silicon carbide coatings were applied on titanium aluminide by both chemical vapor deposition and sputter deposition techniques.
Shyi-Kaan Wu, Ray Y. Lin
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Structure of Platinum Modified Aluminide Coatings
1984A preliminary investigation of platinum modified aluminide coatings from two commercial sources indicates that oxidation penetration during exposure at 108°C in air is dependent on the initial coating structure. The corresponding microstructures have been characterized by platinum pre-aluminizing treatments, and coating pack aluminum activity in the ...
R. Streiff, D. H. Boone, L. J. Purvis
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Microstructural Characterization of a Pt-Aluminide Coated IN738LC
Journal of Materials Engineering and Performance, 2001In this paper, the microstructural and chemical characterization of the IN738LC superalloy, coated with a Pt-Cr modified aluminide coating, is presented. The effects of aging in air at 850 °C on superalloy and coating microstructures were investigated. The growth of γ′ precipitates in IN738LC follows the Wagner-Lifshits model. The positive effect of Pt
CALLIARI, IRENE +2 more
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