20110008604 | HARD NON-OXIDE OR OXIDE CERAMIC / HARD NON-OXIDE OR OXIDE CERAMIC COMPOSITE HYBRID ARTICLE - Embodiments of the invention include a hybrid article comprising at least one hard non-oxide or oxide ceramic component of at least 95% of theoretical density directly bonded to, and different from, a hard non-oxide or oxide ceramic composite component comprising a tribology enhancing component. The at least one hard non-oxide or oxide ceramic component comprises a member of the group consisting of silicon carbide, pressureless sintered silicon carbide, liquid phase sintered silicon carbide, reaction bonded silicon carbide, tungsten carbide, aluminum oxide, and silicon nitride. The at least one hard non-oxide or oxide ceramic composite component comprises a member of the group consisting of silicon carbide, pressureless sintered silicon carbide, liquid phase sintered silicon carbide, reaction bonded silicon carbide, tungsten carbide, aluminum oxide, and silicon nitride. In some embodiments, the hybrid article is formed by preparing at least one hard non-oxide or oxide ceramic body of at least 95% of theoretical density, preparing at least one hard non-oxide or oxide ceramic composite body comprising a tribology enhancing component, placing the bodies into contact with one another to form a hybrid article, and treating the hybrid article to directly bond the bodies. In some embodiments, treating the hybrid article may include hot isostatic pressing, pressureless sintering, liquid phase sintering, or reaction bonding. | 01-13-2011 |