CARBONIZATION OF PLASTICS AND REFRACTORY MATERIALS RESEARCH. Period covered: November 1, 1959 to June 30, 1960

Technical Report · Fri Jul 01 04:00:00 EDT 1960

OSTI ID:4070675

Coffman, J A; Kibler, G M; Riethof, T R; Watts, A A

AF33(616)-6841. Three complementary experimental techniques are being used to study the carbonization of plastics. These are thermogravimetric analysis, which gives an over-all picture of reaction rates under slow heating; fluid-bed carbonization of powdered resin, which provides insight into the mechanism; and arc image furnace experiments in which the plastics are exposed to temperatures approaching those of actual ablation applications. Vapor pressure studies are being conducted using the Langmuir evaporation technique. In addition matrix-isolation techniques and resonance-line absorption spectroscopy are being applied to the study of vapor species. Materials studied are tantalum carbide, zirconium carbide, and thoria. Normal spectral emissivities of tungsten, tantalum carbide and zirconium carbide were measured between 1800 and 3000 deg K using an emissometer designed and built for this purpose. Results of these studies are given and discussed. (auth)

• Research Organization: General Electric Co. Flight Propulsion Lab. Dept., Cincinnati
• NSA Number: NSA-15-005381
• OSTI ID: 4070675
• Report Number(s): WADD-TR-60-646
• Country of Publication: United States
• Language: English

Related Subjects

ABSORPTION
CARBON
CARBURIZATION
ELECTRIC ARCS
EMISSION
EVAPORATION
FLUIDIZATION
FURNACES
HEATING
HIGH TEMPERATURE
IMAGES
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
POLYMERS
PRESSURE
REFRACTORIES
RESINS
RESONANCE
SPECTRA
SPECTROSCOPY
TANTALUM CARBIDES
THORIUM OXIDES
TUNGSTEN
VAPORS
ZIRCONIUM CARBIDES