THERMAL PROPERTIES OF REFRACTORY MATERIALS. Quarterly Progress Report No.3, February 1, 1961 to April 31, 1961

Technical Report · Sat Apr 01 00:00:00 EST 1961

DOI:https://doi.org/10.2172/4837581· OSTI ID:4837581

Cape, J A; Taylor, R E

The construction of an automatic recording optical pyrometer was completed. This completed the apparatus for measurement of transient thermal properties. Preliminary results of the testing and alignment of the complete apparatus indicated that modifications must be made on the heater radiation shields to prevent spurious light from being collected by the pyrometer. The thermal conductivity of titanium carbide was measured over the temperature region from 400 to 1200 deg C. The steady state radial heat flow method was used. The conductivity varied linearly from 0.088 cal/sec cm deg C at 500 deg C to 0.109 cal/sec cm deg C at 1100 deg C. These results were in marked contrast to values reported in the literature. The techniques and apparatus for measuring the specific heat of brittle conductors by pulse heating are described. Resistivity and specific heat data for uranium silicide of several compositions are reported. The resistivity and specific heat increased with increasing silicon content. For uranium silicide containing 3.8% silicon, the resistivity increased from 56 microhm-cm at 0 deg C to 75 microhm-cm at 750 deg C and for uranium silicide containing 5.9% silicon, the resistivity increased from 81 microhm-cm at 0 deg C to 111 microhm-cm at 800 deg C. The specific heat for the 3.8% material is given by c/sub p/ = 3.16 x 10/sup -6/ T +.0412 cal/gm deg C from 50 to 430 deg C and for the 5.8% material c/sub p/ = 16.1 x 10/sup -6/ T + 0.0455 cal/gm deg C from 50 deg to 715 deg C. T is in deg C. (auth)

• Research Organization: Atomics International. Div. of North American Aviation, Inc., Canoga Park, CA (United States)
• NSA Number: NSA-15-032532
• OSTI ID: 4837581
• Report Number(s): AI-6358; AD-255894
• Country of Publication: United States
• Language: English

Related Subjects

BRITTLENESS
EQUATIONS
HEATING
HIGH TEMPERATURE
LIGHT
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
OPTICAL SYSTEMS
RADIATIONS
REFRACTORIES
SHIELDING
SILICIDES
SPECIFIC HEAT
TESTING
THERMAL CONDUCTIVITY
THERMODYNAMICS
TITANIUM CARBIDES
TRANSIENTS
URANIUM