Process for coating an object with silicon carbide

Details Process for coating an object with silicon carbide Process for coating an object with silicon carbide

1988-08-08

1989-10-03

Silverman, Stanley

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

427113, 427228, 4272551, 4272554, 4273762, 427399, C23C 1600

Patent

active

048715875

ABSTRACT:
A process for coating a carbon or graphite object with silicon carbide by contacting it with silicon liquid and vapor over various lengths of contact time. In the process, a stream of silicon-containing precursor material in gaseous phase below the decomposition temperature of said gas and a co-reactant, carrier or diluent gas such as hydrogen is passed through a hole within a high emissivity, thin, insulating septum into a reaction chamber above the melting point of silicon. The thin septum has one face below the decomposition temperature of the gas and an opposite face exposed to the reaction chamber. The precursor gas is decomposed directly to silicon in the reaction chamber. A stream of any decomposition gas and any unreacted precursor gas from said reaction chamber is removed. The object within the reaction chamber is then contacted with silicon, and recovered after it has been coated with silicon carbide.

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patent: 3369920 (1968-02-01), Bourdeau et al.
patent: 3455723 (1969-07-01), Kern
patent: 3925577 (1975-12-01), Fatzer et al.
patent: 4029844 (1977-06-01), Olcott
patent: 4040870 (1977-08-01), Holzl
patent: 4068037 (1978-01-01), Debolt et al.
patent: 4373006 (1983-02-01), Galasso et al.
patent: 4397901 (1983-08-01), Warren
patent: 4476178 (1984-10-01), Veltri et al.

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