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The Thermal Properties Of Thirteen Solid Materials To 5000°F For Their Destruction Temperatures

Report Number: WADD TR 60-924
Author(s): David S. Neel, C. D. Pears, Sabert Oglesby, Jr.
Corporate Author: Southern Research Institute
Laboratory: Directorate of Materials and Processes
Date of Publication: 1962-02
Pages: 217
Contract: AF 33(616)-6312
Project: 7360
Task: 73603
AD Number: AD0275536

Abstract:
The heat capacity, thermal expansion, and thermal conductivity were measured for thirteen different refractory materials, including ATJ graphite, tungsten, four nitrides, two borides, a silicate, and four carbides. The temperature range was from 500°F to 5000°F. The heat capacity was found to vary considerably with temperature and demonstrated marked inflections at specific temperature ranges. The thermal expansion parallel with the press direction was in the range of 3 x 10-6 in./in./° F and to vary significantly with the prior thermal history of the specimen. At temperatures within about 1000°F of the melting or deterioration range, the motions of the materials generally increased considerably. The thermal conductivity perpendicular to the press direction was found to be generally of the same value for materials of the same family, viz., the nitrides or carbides. The prior thermal history had a marked influence on the resulting values. Considerable information was obtained on the performance of 5000°F furnaces with graphite heaters, high temperature thermocouples, optical pyrometry, and the behavior of specimen materials in these 5000°F environments. All materials except a few failed at considerably below the handbook values for their melting or deterioration temperatures.

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