Article coated with beta silicon carbide and silicon

Details Article coated with beta silicon carbide and silicon Article coated with beta silicon carbide and silicon

1980-02-04

1981-09-08

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of silicon containing

423345, 427 34, 427423, 428428, 428450, B05D 108, B32B 1304, B32B 904, C01B 3136

Patent

active

042884950

ABSTRACT:
This application discloses a new powder composition which may be plasma sprayed onto the surface of an article to provide a protective coating therefor. The protective coating may be resistant to heat, wear, and corrosion. The coating may also provide a thermal or radiation barrier.
In particular, the coating composition for arc plasma spraying consists of finely divided silicon carbide mixed with finely divided silicon. This coating composition is applied to a substrate by developing a plasma spray, feeding the coating composition to the plasma spray and directing the plasma spray at an exposed surface of the substrate so that the exposed substrate is coated with a coating which consists essentially of beta silicon carbide and silicon.
The new article of manufacture disclosed in this application, is a substrate with a tightly adherent coating thereon consisting essentially of beta silicon carbide and silicon. The substrate may be any material, either metallic or non-metallic, to which the coating adheres. The coating may provide the substrate with wear resistant characteristics as, for example, if the substrate is to be used for machining metals or as a valve seat in an aluminum engine. The substrate, with the coating thereon, may be used to withstand severe temperatures as, for example, in rocket nozzles and other areas where a substrate would be subjected to extreme temperatures.

REFERENCES:
patent: 2775531 (1956-12-01), Montgomery
patent: 2998322 (1961-08-01), Strate
patent: 3019128 (1962-01-01), Smiley
patent: 3095316 (1963-06-01), Hartwig
patent: 3274007 (1966-09-01), Jones
patent: 3275471 (1966-09-01), Lowell
patent: 3419415 (1968-12-01), Dittrich
patent: 3676179 (1972-07-01), Bokros
patent: 3925577 (1975-12-01), Fatzer
patent: 4075376 (1978-02-01), Jaeger

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