Back to results
US 5,587,228 AGranted
Microparticle enhanced fibrous ceramics
AssigneeThe Boeing Company
InventorsAnna L. Baker, Darryl F. Garrigus
Life of this patent
Estimating the term…
Abstract
A ceramic composite is provided comprising ceramic fibers and microparticles bound together as a porous matrix with a ceramic binder. The ceramic composite is particularly useful for transporting cryogenic fluids.
Claims16
A ceramic composite which is the product of the process of:
- (a) forming a slurry of ceramic components in a liquid, the components including microparticles in the size range between about 5-200 micrometers and selected from the group consisting of hollow microballoons, diatoms, solid microparticles and mixtures thereof;
- (b) felting a wet mat of the ceramic components from the slurry;
- (c) drying the wet mat;
- (d) infusing a ceramic sol-gel binder into the dry mat;
- (e) gelling and curing the binder at a temperature of no more than about 600.degree. F. to form a glass to hold the felted ceramic components in a rigid, porous, low-density, ceramic form;
- (f) optionally, infusing additional binder into the mat to increase the density and strength;
- and
- (g) optionally, gelling and curing the subsequent infusions of binder.
5 more elements
A ceramic composite, which is the product made by:
- (a) slurrying hollow ceramic microballoons with water;
- (b) felting the microballoons out of the slurry to form a wet mat;
- (c) drying the mat;
- (d) infusing a sol-gel ceramic binder into the dried mat to form bridges between the microparticles;
- (e) gelling the binder;
- and
- (f) curing the gelled binder at a temperature no greater than about 600.degree. F. to form a glass that interconnects the microballoons into a rigid, porous product.
4 more elements
Dependencies are inferred from the claim text.