Carbon fabrics sequentially resin coated with (1) a metal-containing composition and (2) a boron-containing composition are laminated and carbonized
US4321298A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Feb 26, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/3683
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fibrous carbon material is first coated with a thermosetting material which remains flexible after being subjected to curing temperatures. The thermosetting material contains a refractory metal capable of reacting with boron to form a metal boride. This thermosetting resin is then cured. The fibrous carbon material is then impregnated with a second thermosetting resin containing a boron compound and, optionally, a refractory metal capable of reacting with boron to form a metal boride. The second thermosetting resin is at least partially cured and a plurality of layers of the fibrous material is then assembled to form a laminate. The laminate is heated to a temperature sufficient to carbonize the thermosetting resin. The resultant carbon-carbon composite has better oxidation resistance, improved high temperature stability, higher density and improved interlaminar tensile strength than does a composite prepared without the presence of the refractory metal in the thermosetting resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.