Thermal Diffusivity Measurements on Metals and Ceramics at High Temperatures

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Report Number: ASD TDR 62-24
Author(s): Rudkin, R. L., Jenkins, R. J., Parker, W. J.
Corporate Author(s): U. S. Naval Radiological Defense Laboratory
Laboratory: Directorate of Operational Support Engineering
Date of Publication: 1963-01
Pages: 26
Contract: AF 33(616)-61-7
DoD Project: 7360
DoD Task: 736001
Identifier: AD0297836

The adaption of the NRDL flash method to the measurement of the thermal diffusivity of metals and ceramics at high temperatures is described. A high intensity short duration light pulse from a xenon flash lamp is absorbed in the front surface of a thermally insulated specimen a few millimeters thick and the resultant temperature history of the rear surface is measured by a lead sulfide cell radiation detector or a thermocouple, displayed on an oscilloscope and photographed by a Polaroid Land camera. The thermal diffusivity of the material is determined from this temperature versus time curve provided the theoretical boundary conditions are experimentally satisifed. Measurements of the thermal diffusivity of Armco iron, molybdenum, titanium, zirconia, and alumina have been made up to 1200 degrees C, 1300 degrees C, 1700 degrees C, 1100 degrees C and 1100 degrees C, respectively.

Provenance: Lockheed Martin Missiles & Fire Control

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