Project Title:

An Advanced Carbon-Carbon Composite with Improved Interlaminar and Flexure Properties

04.07-1980
911713
An Advanced Carbon-Carbon Composite with Improved Interlaminar and Flexure Properties
and Oxidation Resistance
Materials & Electrochemical Research
7960 South Kolb Road
Tucson
AZ
85706
J. C.
Withers
602-574-1980
LaRC
NAS1-19528
050

04.07-1980
911713

Abstract:

An Advanced Carbon-Carbon Composite with Improved Interlaminar and Flexure Properties
and Oxidation Resistance
Carbon-carbon composites have significant potential for use in airframes, hot structural
applications on advanced hypersonic vehicles, spacecraft, and engines, but have not
reached their potential due to limiting properties of interlaminar and flexure strength
and oxidation resistance. An innovative approach that overcomes these difficulties
utilizes a SiC conversion coating, without or with whiskers, on the graphite reinforcements;
doping of the carbon matrix with a gradation to the surface to inhibit oxidation
and match CTE of a coating system that encompasses a bridge coating; and a proven
oxidation resistant layer and a moisture resistant glaze. A composite-coating system
integrally designed will have substantial increased mechanical and oxidation resistant
properties over current systems.
A carbon-carbon composite with substantially improved interlaminar and flexure properties,
and oxidation resistance will have broad usage in airframes, space structures, engines,
brakes, dies, and so on.
carbon-carbon composites, coatings, plasma deposition, SiC coatings.