Reinforced ceramic structures
US6235381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Dec 16, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2995
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A reinforced ceramic structure, such as a superplastic forming die for forming a metal part, has a body of cast silica/calcium aluminate or mullite based ceramic material; and a plurality of reinforcing rods, made of monolithic fused oxides of silicon or aluminum, cast into said ceramic body. The rods have a thickness between 1/8"-2.0" and are spaced apart on centers by about 2-10 times the diameter of the rods. The rods are bonded in the ceramic body or they may be coated with a release agent to prevent bonding to said ceramic body so that they can translate in the direction of their axes to prevent cracking during drying and curing. The rods are disposed in an array of at least two rows, with the rods in each row arranged parallel to each other and with the rods in adjacent rows arranged orthogonally to each other. The rows are spaced apart a distance equal to about 1/2-3 times the diameter of the rods. Some of said rods may be hollow and receive electrical heater elements for heating the reinforced ceramic structure. The rods extend completely across the full length and width of the body. A process for manufacturing the reinforced ceramic die includes selecting a casting box hav…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.