Accession Number : AD0270153

Title :   FABRICATION OF PYROLYTIC GRAPHITE ROCKET NOZZLE COMPONENTS

Corporate Author : GENERAL ELECTRIC CO CINCINNATI OHIO

Personal Author(s) : SHIPP,D.J.

Report Date : 30 DEC 1961

Pagination or Media Count : 95

Abstract : Pyrolytic graphite is produced by the degradation of a hydrocarbon vapor either by the thermal energy it receives from its proximity to a hot surface or by impingement onto that hot surface. A wide range of environmental conditions can be used to produce the material with the resulting physical properties being a function of the particular environmental conditions employed. Depositing pyrolytic graphite onto a substrate involved the following steps: (1) the substrate was loaded into the susceptor and the chamber was evacuated to an absolute pressure of 1 mm Hg or less, (2) the substrate was heated to the desired temperature, (3) the hydrocarbon vapor was then passed through and/or around the substrate with gaseous reaction by-products being exhausted with vacuum pumps, and (4) after sufficient time had elapsed for formation of the required amount of pyrolytic graphite the flow of reaction gas was stopped. The pyrolytic graphite coated substrate was allowed to cool slowly to room temperature, after which it was removed to undergo subsequent operations. (Author)

Descriptors :   *GRAPHITE, *ROCKET NOZZLES, COMBUSTION DEPOSITS, HEAT OF SUBLIMATION, HIGH TEMPERATURE, HYDROCARBONS, MACHINING, NONDESTRUCTIVE TESTING, PRODUCTION, PYROLYSIS, REFRACTORY COATINGS, REFRACTORY MATERIALS, ROCKET ENGINES, SOLID ROCKET PROPELLANTS, SUBLIMATION, TEMPERATURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE