RESEARCH AND EVALUATION OF MATERIALS FOR THERMOCOUPLE APPLICATION SUITABLE FOR TEMPERATURE MEASUREMENTS UP TO 4500F ON THE SURFACE OF GLIDE RE-ENTRY VEHICLES

Technical Report · Wed May 01 04:00:00 EDT 1963

OSTI ID:4685734

Kuhlman, W C

The thermoelectric output versus temperature of a W/W 26Re thermocouple was measured to 5800 deg F. Thermoelectric sensitivity was relatively high over the entire temperature range. Thermoelectric output on new thermocouple systems versus temperature was also measured with respect to W--26Re commercial wire for Re, Re-W, Re--Ru, Re--Rh, Re--Pt, Re--Ir, Re--Mo, Re--Os, Mo, Mo--W, Mo-Re, and Ir--Re alloy materials. Of the alloys studied, Re-10Ru and Re--12W showed the greatest potential for hightemperature thermocouple application. The oxides BeO, ThO/sub 2/, and HfO/sub 2/ are compared as electrical insulators. Beryllia is best, but with proper geometry ThO/sub 2/ and HfO/sub 2/ would also be satisfactory. Boron nitride was found to react with W and W--26Re materials above 3700 deg F in He. The melting points of many rare earth oxides, zirconates, and hafnates were determined. Weight losses of Ir, Ir-10Re, Os, Ir-- 50Os, and Ir--20Os at 0.1 atmosphere pressure at approximately 4400 deg F were measured. The test shows that Ir--20Os alloy, with a measured melting point of 4600 deg F, should make satisfactory sheathing material for short time service. (auth)

• Research Organization: General Electric Co. Advanced Technology Services, Cincinnati
• NSA Number: NSA-17-029170
• OSTI ID: 4685734
• Report Number(s): ASD-TDR-63-233
• Country of Publication: United States
• Language: English

Related Subjects

BERYLLIUM OXIDES
BORON NITRIDES
CHEMICAL REACTIONS
DIELECTRICS
HAFNIUM OXIDES
INSTRUMENTS AND INSTRUMENTATION
IRIDIUM
IRIDIUM ALLOYS
LOSSES
MEASURED VALUES
MELTING POINTS
MOLYBDENUM ALLOYS
OSMIUM
OSMIUM ALLOYS
OXIDES
PLATINUM ALLOYS
RARE EARTHS
RE-ENTRY
RHENIUM
RHENIUM ALLOYS
RHODIUM ALLOYS
RUTHENIUM ALLOYS
SENSITIVITY
SPACE VEHICLES
SURFACES
TEMPERATURE
THERMOCOUPLES
THERMOELECTRICITY
THORIUM OXIDES
TUNGSTEN ALLOYS
WEIGHT
ZIRCONIUM OXIDES