Alumina composite reinforced by zirconia-clad alumina fibers
AssigneeAllied-Signal Inc.
InventorsWilliam L. Olson, Keith R. Karasek
Life of this patent
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Abstract
Alumina fibers whose surface is coated with zirconia to retain their identity in an alumina matrix when the mixture is sintered at temperatures needed to form a fully dense ceramic. The resulting fully dense ceramic composite shows the beneficial effects of such reinforcing fibers by having increased crack toughness.
Claims8
A fully dense ceramic composite comprising an alumina matrix containing surface zirconated alumina fibers.
A method of making a fully dense alumina ceramic composite containing discrete alumina fibers comprising zirconating the surface of alumina fibers to afford surface zirconated alumina fibers, mixing the surface zirconated fibers with alumina, and sintering the mixture under pressure to form a fully dense ceramic composite.
Dependencies are inferred from the claim text.