Stock material or miscellaneous articles – Composite – Of quartz or glass
Reexamination Certificate
2011-01-18
2011-01-18
Blackwell, Gwendolyn (Department: 1784)
Stock material or miscellaneous articles
Composite
Of quartz or glass
C428S426000, C428S428000
Reexamination Certificate
active
07871706
ABSTRACT:
The present invention provides a functionally graded glass/ceramic/glass sandwich system for use in damage resistant, ceramic and orthopedic prosthesis. The functionally graded glass/substrate/glass composite structure comprises an outer residual glass layer, a graded glass-ceramic layer, and a dense interior ceramic. The functionally graded glass/substrate/glass composite structure may further comprise a veneer on an exterior surface.The present invention also provides a method for preparing a functionally graded glass/ceramic/glass sandwich system. A powdered glass-ceramic composition is applied to the accessible surfaces of a presintered zirconia substrate to thereby substantially cover the substrate surfaces. The glass of the composition has a CTE similar to that of the substrate material. The glass-ceramic composition is infiltrated into and densifies the substrate by heating the assembly to at least the sintering temperature of the substrate.
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Kim Jae-won
Zhang Yu
Blackwell Gwendolyn
Klauber & Jackson LLC
New York University
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