Project Title:

A Unique Silicon-Carbide Reusable Thermal Protection Material

04.09-1980
912063
A Unique Silicon-Carbide Reusable Thermal Protection Material
Materials & Electrochemical Research
7960 South Kolb Road
Tucson
AZ
85706
Raouf O.
Loutfy
602-574-1980
JSC
NAS9-18691
052

04.09-1980
912063

Abstract:

Novel Thermal Protection Materials
A new and unique process, chemical vapor reaction (CVR), to convert graphite structures
to low-density SiC structures will be investigated to produce high-temperature thermal
protection materials. Available heat shield materials have temperature limitations
of about 2500F and extremely low mechanical properties. In this project net-shape,
low-density SiC with excellent strength, excellent thermal shock resistance, high
emissivity, high-temperature capability, and low thermal conductivity will be developed.
The properties of the SiC will be optimized by investigating the effect of the graphite
precursor's density and microstructure and the effect of CVR process operating parameters.
The CVR-SiC materials will also be CVD SiC coated to improve ablation resistance.
Test specimens will be fabricated and fully characterized, and samples will be delivered
to NASA for evaluation.
In addition to a structural insulation for use on the Space Shuttle and other re-entry
vehicles, a high-temperature structural insulation will have commercial applications
as thermal barrier coatings in gas turbine engines, spark ignition and diesel engines,
furnace insulation, and so on.
insulation, composites, 3000F, SiC