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US 7,452,606 B2Granted
Silicon carbide ceramic components having oxide layer
AssigneeSaint-Gobain Ceramics & Plastics, Inc.
InventorRaymond H. Bryden
Life of this patent
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Abstract
A ceramic component is provided, including a ceramic body containing silicon carbide, and an oxide layer provided on the ceramic body, the oxide layer being formed by oxidizing the ceramic body in the presence of alumina and boron.
Claims19
A ceramic component, comprising:
- a ceramic body comprising nitride bonded silicon carbide and an oxide layer, said oxide layer having an amorphous matrix comprising borosilicate glass and a crystalline phase in the amorphous matrix and comprising at least one of alumina or an aluminosilicate, the oxide layer forming an adherent, conformal layer that resists spalling and flaking and functions to passivate and protect the ceramic body from excessive oxidation and excessive weight gain.
A ceramic component comprising nitride bonded silicon carbide and an oxide layer, said oxide layer having an amorphous matrix comprising borosilicate glass and a crystalline phase in the amorphous matrix and comprising at least one of alumina anisotropically-shaped crystals or aluminosilicate anisotropically-shaped crystals.
Dependencies are inferred from the claim text.