Hollow composite body having an axis of symmetry
US4847063A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2505/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method of forming a hollow, carbon/carbon composite article around an axis of symmetry, in which method a heat refractory mandrel is shaped to provide a desired inner surface configuration and tolerances of the article, and one or more plies of thermally stable carbon filaments are braided over the surface of the mandrel. The filaments have a diameter of substantially not greater than about 6 microns and a modulus of elasticity of substantially not less than about 45.times.10.sup.6 psi. The plies are then impregnated with a carbonizable liquid impregnant, and the assembly of impregnated plies and mandrel is heat treated so as to carbonize the impregnant. The resulting composite article has a high translation of the original strength of the filaments and has an inner surface defined by the outer surface of the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.