FABRICATION OF PYROLYTIC GRAPHITE ROCKET NOZZLE COMPONENTS
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 30, 1961
- Accession Number
- AD0270153
Entities
People
- D.j. Shipp
Organizations
- General Electric