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US 6,309,702 B1Granted
Process for the production of improved boron coatings
AssigneeTextron Systems Corporation
InventorRaymond J. Suplinskas
Life of this patent
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Abstract
Improved articles of manufacture are disclosed, together with methods for preparing such articles, whereby the surface of a graphite or comparable substrate is first densified with carbon to reduce surface porosity while still retaining sufficient surface texture to enhance the adherence of a subsequently applied boron coating.
Claims15
A method for preparing a boron-coated surface on a porous substrate, said method comprising the steps of:
- (a) substantially surrounding a porous substrate with a first gas consisting essentially of a gaseous hydrocarbon;
- (b) while said substrate is surrounded by said first gas, heating the substrate to a temperature above the decomposition temperature of the hydrocarbon for a period sufficient to at least partially densify the surface of the substrate to reduce surface porosity, while maintaining adequate roughness in the surface of the substrate to promote mechanical locking with a subsequently applied elemental boron coating;
- and (c) coating the at least partially densified substrate surface with elemental boron.
Dependencies are inferred from the claim text.