Results 171 to 180 of about 1,061 (217)

IN SITU MEASUREMENTS OF THE MECHANICAL PROPERTIES OF ALUMINIDE COATINGS

Surface and Coatings Technology, 1990
Abstract A novel technique was used to measure the mechanical properties of surface diffusion coatings which, unlike overlay coatings, cannot be evaluated from bulk samples. Coatings on thin foil samples over a wide range of thicknesses were prepared and a technique related to a law of mixtures approach was used to obtain the elastic modulus, yield ...
P. Hancock, H.H. Chien, J.R. Nicholls, D.J. Stephenson   +3 more
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Aluminide Coatings on Superalloys

1984
Nickel and cobalt superalloys currently used in advanced gas turbines are almost always protected by coatings against high temperature oxidation and hot corrosion. Aluminide coatings are generally obtained by low or high activity pack cementation processes.
C. Duret, R. Mevrel, R. Pichoir
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Microstructural Characterization of a Pt-Aluminide Coated IN738LC

Journal of Materials Engineering and Performance, 2001
In 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, DABALA', MANUELE, ZAMBON, ANDREA   +2 more
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Role of platinum in aluminide coatings

Surface and Coatings Technology, 1991
Abstract 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, N.M. Abbas, T.N. Rhys-Jones   +2 more
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Characterization of the Degraded Microstructures of a Platinum Aluminide Coating

MRS Proceedings, 2001
AbstractTo investigate phase evolution of β-(Ni,Pt)Al/γ-(Ni3Al) in thermal barrier coating bond coat systems, specimens were subjected to 1200°C cyclic and isothermal heating. By removing the thermally grown oxide (TGO) after every 10 hours of heating, aluminum (Al) depletion from the bond coat was accelerated.
H.J. Kim, M.E. Walter
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Oxidation of a La2O3-modified aluminide coating

Scripta Materialia, 2001
acad sinica, inst met res, state key lab corros & protect, shenyang 110015, peoples r china. western kentucky univ, ctr mat characterizat, bowling green, ky 42101 usa.;peng, x (reprint author), acad sinica, inst met res, state key lab corros & protect, shenyang 110015, peoples r ...
X Peng, T Li, W.P Pan
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Protective Aluminide Coatings for Refractory Metals

Oxidation of Metals, 2016
Refractory 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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Aluminide Coatings for Nickel Based Superalloys

Surface Engineering, 2004
A number of aluminide coatings have been developed which are modified by additional elements (noble metals, Cr and reactive elements such as Y and Hf). This results in a marked improvement in their corrosion resistance. In the present paper, aluminide coatings are reviewed. The hot corrosion and oxidation resistance of these coatings in laboratory and
M.R. Khajavi, M.H. Shariat, A. Pasha
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Aluminide Coatings on 304 Stainless Steel

CORROSION 2013, 2013
Abstract 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, Armen Kutyan, Shaghik A. Abolian, Tom F. Krenek, Stephanie A. Salas, Vilupanur A. Ravi   +5 more
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Protection of titanium aluminides by FeCrAlY Coatings

Materials and Corrosion, 1997
AbstractThe effectiveness of Fe+15%Cr+5%Al+0.3%Y coatings. produced by sputter ion plating, in improving the oxidation behaviour of γ‐2 Ti3Al at 800°C and γ‐TiAl at 900° and 1000°C. during cyclic exposures in air of up to 1000 hours duration, has been studied.
M. J. Bennett, S. J. Bull
openaire   +1 more source