Coating processes – Coating by vapor – gas – or smoke – Metal coating
Patent
1996-09-17
1997-12-02
King, Roy V.
Coating processes
Coating by vapor, gas, or smoke
Metal coating
427250, 427237, 427238, 427239, 427124, C23C 1612
Patent
active
056933681
ABSTRACT:
A method is disclosed to deposit aluminum coatings on high temperature superalloys for corrosion, oxidation, and erosion protection using low temperature chemical vapor deposition and an organometallic halide precursor, specifically an aluminum alkyl halide. The process is adapted to protective coatings for turbine parts having internal passages. Due to the lower temperatures used during chemical vapor deposition, a broad range of substrate materials can be utilized. The precursor vapors clean the substrate surfaces by removing native oxides while simultaneously depositing aluminum.
REFERENCES:
patent: 2847320 (1958-08-01), Bulloff
Article --John L. Vossen, and Werner Kern, Chemical Vapor Deposition of Inorganic Thin Films, from the Text Thin Film Processes, Academic Press, (1978) pp. 258-331.
Patent Abstracts of Japan, vol. 015, No. 064 (C-0806) Feb. 15, 1991 --Abstract.
The Iron Age, vol. 196, No. 26, Dec. 23, 1965, pp. 5 & 53, "Aluminum `Plating`Via Alkyl Gas", by J.C. Merriam.
Sasaoka et al, Appl. Phys. Lett. 55 (1989) p. 741.
Ackerman John Frederick
Beltran Adrian Maurice
Coffinberry George Albert
Stowell William Randolph
Wood John Herbert
General Electric Company
Johnson Noreen C.
King Roy V.
Pittman William H.
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