Project Title:

High-Temperature, Hostile-Environment Instruments Manufactured by CVD

01.03-4888
NAS3-25826
High-Temperature, Hostile-Environment
	Instruments Manufactured by CVD
Delta G Corporation
	9960-A Glenoaks Boulevard
	Sun Valley, CA 91352
		Robert A. Holzl
(818-767-4888)

Abstract:

	This project takes advantage of the develop-ment, made in the mid-1960s for the
US Atomic Energy Commission, of a temperature-measuring device for the nuclear rocket
reactor. It was successfully tested at temperatures over 2200C. This project will
reproduce the device with modifications to make it useful in a high-temperature oxidizing
and erosive environment. The design includes a tungsten and tungsten 25-rhenium,
co-axial thermocouple made entirely by the chemical vapor deposition (CVD) process.
The miniaturization made possible by the use of CVD allows for minimal intrusion
of the probe into a working fluid. The high-temperature strength suggests good longevity
for the device. A working model will be constructed and tested at 1900C in air. Other
possible uses for CVD processing for instrument devices for hostile environments
will also be studied.

Potential Commercial Application:

Potential Commercial Applications: Commercial applications include gas temperature
measurements in gas turbine engines, rocket nozzles, and natural gas furnaces.