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CATEGORY II ~ ITEM 7

Pyrolytic deposition and densification equipment and “technology” as follows: (a) “Technology” for producing pyrolytically derived materials formed on a mould, mandrel or other substrate from precursor gases which decompose in the 1,300 degrees C to 2,900 degrees C temperature range at pressures of 130 Pa (1 mm Hg) to 20 kPa (150 mm Hg) in- cluding technology for the composition of precursor gases, flow-rates and process control schedules and parameters;

N ture nd Purpose: Pyrolytic deposition is a high-temperature process used to deposit a thin, dense coating of metal or ceramic onto a mold or mandrel in order to form a part. It also can be used to coat another mate- rial in order to achieve strong adhesion and bonding between the coating material and the underlying surface. The purpose of these processes is to im- prove the ability of the coated or densified items to survive the extreme environments in which critical rocket system parts operate.

The general procedures and methods used to create pyrolytically derived materials and their precursor gasses are widely known. However, specific formulae, processes, and equipment settings are usually empirically derived and considered proprietary trade secrets by industry. Controlled data (tech- nology) may take the form of technical assistance including instruction, skills, training, working knowledge, and consulting services. Technology may take the physical form of blueprints, plans, diagrams, models, formu- lae, engineering designs and specifications, and manuals and instructions written or recorded on other media or devices such as disk, tape, and read- only memories.

(b) Specially designed nozzles for the above processes;

N ture nd Purpose: Nozzles for pyrolytic deposition direct an unreacted gas to a surface on which deposition is desired. The nozzles must be mov- able or located so they can cover the entire surface within a chemical vapor deposition (CVD) furnace at high temperature and pressure.

ITEM 7

Pyrolytic Technology

Produced by comp nies in

  • France

  • ermany

  • Russia

  • United States

7-1

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