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US 4,141,948 AGranted
Method of making a shaped silicon carbide-silicon matrix composite and articles made thereby
AssigneeGeneral Electric Company
InventorsWilliam Laskow, Charles R. Morelock
Life of this patent
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Abstract
A method is described for making a shaped silicon carbide-silicon matrix composite. A confined carbon fiber preform is infiltrated with sufficient molten silicon metal at a temperature in the range of from about 1400.degree. C. to about 1800.degree. C. in an inert atmosphere or vacuum.
Claims8
A method for making a silicon-carbide ceramic within 1/2% tolerance of the desired shape which comprises,
- (1) infiltrating molten silicon at a temperature of from 1400.degree. C. to 1800.degree. C., into a shaped carbon-fiber part while it is substantially contained in a mold in a non-oxidizing atmosphere and under reduced pressure, and
- (2) separating the resulting silicon-carbide ceramic from the mold where the carbon fiber used in (1) has a specific gravity in the range of from about 1.3 to 1.5.
A method for making silicon carbide ceramic within 1/2% tolerance of the shape desired which comprises
- (1) employing a carbon fiber wick to effect the infiltration of molten silicon at a temperature of from 1400.degree. C. to 1800.degree. C. into a mold substantially filled with a material comprising carbon fibers in a non-oxidizing atmosphere and under reduced pressure and
- (2) separating the resulting silicon carbide ceramic from the mold where the carbon fibers used in (1) have a specific gravity in the range of about 1.3 to 1.5.
Dependencies are inferred from the claim text.