Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1980-02-11
1982-04-20
Lewis, Michael L.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428678, 428679, 428680, 428685, 428941, B32B 1504
Patent
active
043260110
ABSTRACT:
A coated article and method for producing the coated article are described. The article is provided with a coating system which provides protection against hot corrosion at moderate temperatures (1200.degree.-1700.degree. F.). An overlay coating based on a metal selected from the group consisting of iron, nickel or cobalt or mixtures thereof and containing chromium and optionally aluminum, yttrium and/or hafnium is applied to the article to be protected. A silicon rich surface zone is produced at the surface of the overlay coating. Methods including pack cementation and physical vapor deposition are described for producing the coating.
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Amerongen, H.; Structure And Properties Of Silicide Based Diffusion Coatings, The Netherlands, pp. 209-224.
Felix, P. C., et al; CVD-Silicon Coatings For The Corrosion Protection Of Turbine Blades, Sulzer Brothers, Ltd., Switzerland, pp. 600-617.
Wachtell, R. L.; "The Basic Principles Of Diffusion Coating", pp. 105-118.
Stringer, J.; "Hot Corrosion Of High-Temperature Alloys", Ann. Rev. Mater. Sci. pp. 477-509, vol. 7, (1977).
Barkalow Richard H.
Goebel Joseph A.
Ulion Nicholas E.
Lewis Michael L.
Sohl Charles E.
United Technologies Corporation
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