The oxidation behavior of carbon-carbon composites and their coatings

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6065821

Schaeffer, J C

The oxidation of carbon-carbon composites and coatings in oxygen at temperatures between 300 and 1400 C was investigated. State-of-the-art systems were characterized prior to the oxidation studies using optical and scanning electron microscopy. It was determined that uncoated carbon-carbon composites cannot be used at temperatures above about 400 C for extended periods of time because of oxidation. Oxidation does occur at temperatures below 400 C but at very low rates. Boron was found to be an ineffective inhibitor for carbon-carbon oxidation. Coatings were useful in protecting carbon-carbon composites from oxidation under isothermal test conditions but these coatings failed under cyclic conditions. The factors leading to the failure of coatings on carbon-carbon composites are described.

• Research Organization: Pittsburgh Univ., PA (USA)
• OSTI ID: 6065821
• Resource Relation: Other Information: Ph.D. Thesis
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
OXIDATION
PROTECTIVE COATINGS
COMPOSITE MATERIALS
BORON ADDITIONS
FAILURE MODE ANALYSIS
TEMPERATURE EFFECTS
THERMAL CYCLING
ALLOYS
BORON ALLOYS
CHEMICAL REACTIONS
COATINGS
ELEMENTS
MATERIALS
NONMETALS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
360604* - Materials- Corrosion
Erosion
& Degradation