Method for altering the composition and structure of aluminum be

Details Method for altering the composition and structure of aluminum be Method for altering the composition and structure of aluminum be

1977-12-08

1978-08-22

Weisstuch, Aaron

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

204192C, 204192N, 427 39, 427250, 428679, 428680, 428684, 428685, B32B 1500, C23C 1500

Patent

active

041090616

ABSTRACT:
The composition and structure of aluminum bearing overlay alloy coatings, such as MCrAlY type overlay coatings, are altered during deposition from a metallic vapor by biasing the substrate at a small negative potential relative to ground while the vapor is at least partially ionized. The coating layer deposited under such conditions is characterized by substantial freedom from leader defects and by a reduced aluminum content and resultant improved ductility. Such coating conditions can be incorporated in a preselected manner into conventional deposition techniques, such as vacuum vapor deposition and sputtering, to produce a variety of coating compositional and structural variations from a single coating alloy ingot source.

REFERENCES:
patent: 3639151 (1972-02-01), Krutenat
patent: 3649225 (1972-03-01), Simmons, Jr.
patent: 3869779 (1975-03-01), Gedwill et al.
patent: 3900592 (1975-08-01), Kennedy et al.
E. D. McClanahan et al., "Initial Work on the Application of Protective Coatings to Marine Gas Turbine Components by High-Rate Sputtering", ASME Publication 74-Gt-100 (1974).

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