Patent
Diffusion barrier layer
Irene Spitsberg,Ramgopal Darolia,Melvin Robert Jackson,Ji-Cheng Zhao,Jon Conrad Schaeffer +4 more
- 24 Mar 1999
62
TL;DR: In this article, a diffusion barrier is applied on a superalloy substrate comprising a single phase alloy or intermetallic compound, which is characterized by having low solubility for aluminum from either the substrate or the protective coating, and the diffusion barrier has low interdiffusivity for elements from the substrate and the coating.
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Abstract: A coating for use on a superalloy substrate comprising a diffusion barrier as an intermediate layer overlying the substrate and underlying a protective coating having a high aluminum content. The diffusion barrier layer is characterized by having low solubility for aluminum from either the substrate or the protective coating. Further, the diffusion barrier layer has low interdiffusivity for elements from the substrate and the coating, a minimal impact on the mechanical properties of the article which is coated, a minimal thermal expansion mismatch with both the substrate and the high aluminum content protective coating, and can be applied readily using existing coating application techniques. The diffusion barrier is preferably a single phase alloy or intermetallic compound.
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Citations
Thermal barrier coatings technology: critical review, progress update, remaining challenges and prospects
TL;DR: A comprehensive and integrated review of thermal barrier coatings (TBCs) applied to turbine components is provided in this paper, where compositions, morphology, characteristics and performance data for new bonds to achieve longer TBC life are described.
641
Patent
High-Temperature Coatings With Pt Metal Modified gamma-Ni + gamma'-Ni3Al Alloy Compositions
Brian M. Gleeson,Daniel J. Sordelet,Wang Wen +2 more
- 12 May 2004
TL;DR: An alloy including a Pt-group metal, Ni and A1 in relative concentration to provide a.gamma-Ni + A1 is described in this paper, and a coating including the alloy is described.
49
The formation of srz on a fourth generation single crystal superalloy applied with aluminide coating
TL;DR: In this paper, the formation behavior of secondary reaction zone (SRZ) for a 4th generation nickel-base single crystal (SC) superalloy with aluminide coating was investigated.
Patent
Diffusion barrier coatings, and related articles and processes
Ji-Cheng Zhao,Melvin Robert Jackson +1 more
- 11 Jun 2001
TL;DR: In this article, a barrier coating is disclosed, containing about 15 atom % to about 95 atom % chromium; and about 5 atom percent to about 60 atom % of at least one of rhenium, tungsten, and ruthenium.
48
Patent
Method and apparatus application of metallic alloy coatings
Derek D. Hass,Haydn N. G. Wadley,Kumar P. Dharmasena,Yosef Marciano +3 more
- 10 Sep 2002
TL;DR: In this paper, a directed vapor deposition (DVD) method and system for applying at least one bond coating on a substrate for thermal barrier coating systems is presented, which uses an electron beam and a combined inert gas/reactive gas jet of controlled composition to create engineering films.
41
References
Patent
Coating composition having good corrosion and oxidation resistance
David Frederick Bettridge,Thomas Alan Taylor,Robert Clark Tucker +2 more
- 01 Nov 1994
TL;DR: A coating composition comprising an alloy having the formula RCrAlR'R" wherein R is nickel, cobalt or the like; R' is yttrium or hafnium and R" is tantalum, rhenium and/or platinum, preferably mixed with an oxide dispersion such as alumina, to provide an improved class of coatings suitable for operating in high temperature oxidizing environments as discussed by the authors.
67
Patent
Strengthened protective coatings for superalloys
Edward Harvey Goldman,Ramgopal Darolia +1 more
- 07 May 1992
TL;DR: A superalloy component consists of a substrate article of a super-alloy, and a strengthenable, adherent coating on the substrate as mentioned in this paper, which is preferably a nickel-base super alloy that is strengthened by the formation of gamma and gamma-prime phases.
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