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US 4,702,960 AGranted
Surface treatment for carbon and product
AssigneeAvco Corporation
InventorAbraham O. Ogman
Life of this patent
Estimating the term…
Abstract
The invention relates to a surface treatment for a carbon surface. A carbon-rich silicon carbide layer is applied over the carbon surface. The ratio of silicon to carbon in the carbon-rich layer varies from zero at the carbon surface interface to greater than zero and preferably 0.3 to 0.5 on the surface of the carbon-rich layer remote from the interface. A preferred method of making the silicon carbide layer is also presented.
Claims2
A surface treatment for carbon comprising:
- supplying a first surface comprising essentially pure carbon;
- and
- depositing a single layer of carbon-rich silicon carbide overlying said first surface, the ratio of silicon to carbon of said carbon-rich layer varies continuously from zero at the interface with said first surface to greater than zero on the surface of the carbon-rich layer remote from said interface for enhancing the wettability of the carbon surface and the depth of the carbon-rich silicon layer is 0.25 microns .+-.20 percent.
A filamentary reinforcement for metal matrix composite materials comprising:
- a filamentary reinforcement having a carbon exterior surface with a single carbon-rich silicon carbide overlayer where the ratio of silicon to carbon varies continuously from zero at the interface in the carbon exterior surface of the filamentary reinforcement to a value intermediate zero and one at the exterior surface of the carbon-rich layer for enhancing the wettability of the carbon surface and the depth of the carbon-rich silicon layer is 0.25 microns .+-.20 percent.
Dependencies are inferred from the claim text.