Accession Number:
ADA238475
Title:
Oxidation and Wear Resistant Carbon-Carbon Composites
Descriptive Note:
Final rept. 1 Oct 1990-30 Apr 1991
Corporate Author:
LYNNTECH INC BRYAN TX
Personal Author(s):
Report Date:
1991-05-30
Pagination or Media Count:
41.0
Abstract:
Widespread application of carbon carbon composites has been restricted by their low oxidation resistance at elevated temperatures. A major barrier to the development of protective ceramic coatings for these materials is the lack of experimental methods of depositing adherent, crack-free, protective ceramic deposits with high deposition rates in a cost-effective manner. The objective of this project is to develop dense, adherent, electrophoretically deposited ceramic coatings on carbon-carbon composites, giving rise to enhanced oxidation resistance and wear resistance. Ceramic materials, coating additives and methods for bonding and densifying the selected materials have been identified. A broad range of ceramic materials were successfully deposited on carbonaceous substrates from a non-aqueous deposition bath using electrophoresis. Deposited ceramic layers were bonded using either polymeric binders of organometallic compounds or inorganic phosphate-based binders. Attempts to densify the ceramic coatings were unsuccessful.
Descriptors:
- *CARBON
- *CARBON CARBON COMPOSITES
- *OXIDATION RESISTANCE
- HIGH RATE
- LAYERS
- POLYMERS
- HIGH TEMPERATURE
- RESISTANCE
- ORGANOMETALLIC COMPOUNDS
- CERAMIC COATINGS
- SUBSTRATES
- CERAMIC MATERIALS
- COATINGS
- DEPOSITION
- DEPOSITS
- OXIDATION
- PROTECTIVE COATINGS
- ADDITIVES
- BINDERS
- ELECTROPHORESIS
- BATHS
- NONAQUEOUS ELECTROLYTES
Subject Categories:
- Coatings, Colorants and Finishes
- Laminates and Composite Materials