Results 181 to 190 of about 1,061 (217)

Corrosion resistant modified aluminide coatings

Journal of Materials Engineering, 1988
The requirements for increasing operating temperatures in gas turbines and fuel fired energy systems is linked to the use of protective coatings able to improve oxidation and corrosion resistance of structural materials. MCrA1Y-type overlay coatings have been especially designed to protect airfoils and other hot gas component superalloys against hot ...
R. Streiff, D. H. Boone
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High temperature oxidation of aluminide coatings

Materials Science and Engineering, 1987
Abstract 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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An investigation of pack-aluminide coating on steel

Oxidation of Metals, 1982
Aluminide coatings are known to protect steels from oxidation and corrosion in hydrocarbon and sulfur-bearing atmospheres. Pack cementation is ideally suited for forming these coatings on small intricate components, wherein a diffused layer is formed which is well bonded to the substrate.
R. Sivakumar, E. Janardhana Rao
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Creep properties of a Pt–aluminide coating

Acta Materialia, 2006
Abstract The tensile creep properties of a β-rich (Ni,Pt)Al diffusion coating have been determined at various strains over the temperature range 800–1000 °C by deconvoluting the creep response of layered composite specimens under constant stress conditions. It is found that the creep strength of the diffusion coating tends to be higher than that of a
M TAYLOR, H EVANS, E BUSSO, Z QIAN
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Reactive spraying of nickel-aluminide coatings

Journal of Thermal Spray Technology, 1997
Reactive 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, V. K. Sikka, C. J. Swindeman, R. D. Seals   +3 more
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Structure of Platinum Modified Aluminide Coatings

1984
A 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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Surface morphology of diffusion aluminide coatings

Thin Solid Films, 1984
Abstract The surface structure and morphology of aluminide coatings can be important in their performance both in oxidation or hot corrosion resistance and in their mechanical behavior. However, little information is available on the effects of aluminide coating deposition conditions on the coating surface.
R. Streiff, J.M. N'Gandu Muamba, D.H. Boone   +2 more
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Coatings of Powders Based on Iron Aluminides

International Thermal Spray Conference, 2002
Abstract Iron aluminides show great potential for use in high-temperature oxygen and sulfur environments, but the intermetallic phases of the Fe-Al system tend to be brittle. This paper describes a powder making process in which FeAl phases are reinforced with inclusions from other intermetallic phases that arrest cracks and prevent them
A.P. Ilyuschenko, T.L. Talako, A.V. Beliaev, A.I. Letsko, B. Formanek   +4 more
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Nanoparticles in hafnium-doped aluminide coatings

Materials Letters, 2015
Abstract The microstructure of the zirconium doped aluminide coating deposited on the nickel substrate by the CVD method is presented. TEM analysis proved that the s-NiAl and the γ′-Ni3Al are the main phases of the deposited coating. Some dislocations in the nickel substrate and in the coating were observed.
Jolanta Romanowska, Jerzy Morgiel, Maryana Zagula-Yavorska, Jan Sieniawski   +3 more
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Recent progress in the coating protection of gamma titanium-aluminides

JOM, 2006
Engine designers show continued interest in titanium aluminides based on the intermetallic γ-TiAl phase as lightweight structural materials to be used at moderately elevated temperatures. Although alloy development has made significant progress in terms of mechanical properties and environmental resistance, protective coatings have been developed that ...
Leyens, Christoph, Braun, Reinhold, Fröhlich, Maik, Hovsepian, Papken Eh.   +3 more
openaire   +2 more sources