Effect of the Palladium Mid-Layer on the Cyclic Oxidation of Platinum Aluminide Bond Coating

2006 ◽  
Vol 510-511 ◽  
pp. 1058-1061 ◽  
Author(s):  
Seok Jun Hong ◽  
Jae Woong Choi ◽  
Gil Ho Hwang ◽  
Won Kyu Han ◽  
Joon Shik Park ◽  
...  
Keyword(s):  
Cyclic Oxidation ◽  
Aluminide Coating ◽  
Nickel Base Superalloy ◽  
Bond Coating ◽  
Aluminide Coatings ◽  
Β Phase ◽  
Platinum Aluminide ◽  
Pd Alloy ◽  
Nickel Base ◽  
Base Superalloy

Platinum/Palladium modified aluminide coatings prepared by aluminide pack cementation on the nickel base superalloy Inconnel 738. The platinum/palladium modified aluminide coating of cyclic oxidation behavior at 1200°C was investigated by TGA, XRD and SEM/EDS. Platinum/Palladium modified aluminide coatings showed better cyclic oxidation resistance than Platinum modified aluminide coating and palladium modified aluminide coating compared. Pt and Pd alloy played an enough role in alumina stabilization and in delaying the degradation of β-phase.

scholarly journals Hot Corrosion Resistance of Chromium Modified Platinum-Aluminide Coating

1986 ◽  
Author(s):  
M. W. Dust ◽  
P. Deb ◽  
D. H. Boone ◽  
S. Shankar
Keyword(s):  
Corrosion Resistance ◽  
Hot Corrosion ◽  
Surface Composition ◽  
Aluminide Coating ◽  
Nickel Base Superalloy ◽  
Phase Layer ◽  
Aluminide Coatings ◽  
Platinum Aluminide ◽  
Nickel Base ◽  
High Level

The addition of elements such as Cr or Pt to the diffusion aluminide coatings has been reported to provide increased protectivity under hot corrosion and oxidation environments. Although the structure and corresponding corrosion resistance of Cr or Pt modified aluminides are reasonably understood there is, however, little information available on the combined additions of Cr and Pt or the processing sequences involved. The effects of both Cr and Pt additions to aluminide coatings on the IN-100 nickel-base superalloy substrate under low temperature (700°C) hot corrosion conditions have been studied. In this investigation, it was found that the structure of the Cr modified platinum-aluminide coatings is most dependent on the sequence of modifying element addition which affects the surface composition and resulting LTHC resistance. The optimum Cr-Pt coating is obtained by the Cr-Pt-Al deposition sequence which results in a continuous single PtAl2 phase layer backed up with a high level of Cr at the surface.

Thermo-Chemical Process of Aluminizing of the Nickel-Base Superalloy

2011 ◽  
Vol 674 ◽  
pp. 81-88 ◽  
Author(s):  
Marek Poręba ◽  
Waldemar Ziaja ◽  
Jan Sieniawski
Keyword(s):  
Oxidation Resistance ◽  
Chemical Process ◽  
Cyclic Oxidation ◽  
Aluminide Coating ◽  
Nickel Base Superalloy ◽  
Creep Tests ◽  
Cvd Method ◽  
Nickel Base ◽  
Low Activity ◽  
Base Superalloy

The thermo-chemical treatment routes for Renè77 superalloy were developed comprising low activity and high activity aluminizing by CVD method. The influence of the treatment on the oxidation resistance in air and creep resistance of the alloy was examined. The cyclic oxidation tests at 1100°C for 500 cycles were carried out. Creep tests were performed at 982°C at the stress level of 124 and 151.7MPa. The chemical and phase composition of the surface layer was analyzed after aluminizing. It was found that aluminide coating enhanced oxidation resistance of the Renè77 superalloy without deterioration of its mechanical properties.

Gas phase aluminide coatings on nickel-base superalloy in 713

1988 ◽  
Vol 156 (2) ◽  
pp. 259-264 ◽  
Author(s):  
H.J. Lin ◽  
W.P. Sun ◽  
M.H. Hon
Keyword(s):  
Gas Phase ◽  
Nickel Base Superalloy ◽  
Aluminide Coatings ◽  
Nickel Base ◽  
Base Superalloy

The Effects of Aluminum Activity on Aluminide Coating Formation of Nickel-Base Superalloy

2012 ◽  
Vol 198-199 ◽  
pp. 32-35
Author(s):  
Feng Zhou ◽  
Ming Gao ◽  
Ying Che Ma ◽  
Gan Feng Tu ◽  
Ke Wu Peng
Keyword(s):  
Phase Composition ◽  
Aluminide Coating ◽  
Diffusion Coating ◽  
Pack Cementation ◽  
Nickel Base Superalloy ◽  
Aluminum Activity ◽  
Coating Formation ◽  
Al Powder ◽  
Nickel Base ◽  
Base Superalloy

The effects of different pure Al compositon in the pack powder on aluminide coating formation of a new kind of Ni-Cr-W-Al nickel-base superalloy by pack cementation aluminizing was investigated. The content of pure Al powder is 15% and 30% in the aluminizing agent. The microstructure and phase composition of diffusion coating was studied.

Precipitation of β phase in the γ’ particles of nickel-base superalloy

1984 ◽  
Vol 15 (7) ◽  
pp. 1331-1334 ◽  
Author(s):  
Guo Jianting ◽  
D. Ranucci ◽  
F. Gherardi
Keyword(s):  
Nickel Base Superalloy ◽  
Β Phase ◽  
Nickel Base ◽  
Base Superalloy

Aluminide Coating Prepared on Ni-Base Superalloy by Pack Cementation

2013 ◽  
Vol 848 ◽  
pp. 11-17 ◽  
Author(s):  
Feng Zhou ◽  
Ming Gao ◽  
Gan Feng Tu ◽  
Kui Liu ◽  
Ke Wu Peng
Keyword(s):  
Aluminide Coating ◽  
Pack Cementation ◽  
Nickel Base Superalloy ◽  
Al Content ◽  
Coating Formation ◽  
Electron Microscopes ◽  
Nickel Base ◽  
Xrd Techniques ◽  
Scanning Electron Microscopes ◽  
Base Superalloy

Alumincoating was prepared on a Ni-Cr-W-Al nickel-base superalloy by pack cementation, the effects of Al content and aluminizing temperature on coating formation were investigated. Coating microstructures were investigated using optical and scanning electron microscopes, EDS and X-ray diffraction (XRD) techniques. The results showed that the coatings prepared at 800°C in the powders with 15%, 30% and 99% Al were different. NiAl3 coating was obtained in the conditions of aluminizing temperature of 700°C, 750°C, 850°C and of Al content of 99%.

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