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A Dynamic Technique for Measurements of Thermophysical Properties at High Temperatures

Published online by Cambridge University Press:  15 February 2011

Ared Cezairliyan
Ared Cezairliyan*
Affiliation:
Thermophysics Division, National Bureau of Standards, Washinoton, D.C. 20234
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Abstract

A technique is described for the dynamic measurements of selected thermophysical properties of electrically conducting substances in the range 1500 K to the melting temperature of the specimen. The technique is based on rapid resistive self-heating of the specimen from room temperature to any desired high temperature in less than one second by the passage of an electrical current pulse through it and on measuring the pertinent quantities, such as current, voltage and temperature, with millisecond resolution. The technique was applied to the measurements of heat capacity, electrical resistivity, hemispherical total emittance, normal spectral emittance, thermal expansion, melting temperature, heat of fusion, and temperature and energy of solid-solid phase transformations. Upper temperature of the measurements has been limited by the melting temperature of the specimen, at which point, the specimen collapses due to the gravitational force. In order to be able to extend the measurements to the liquid phase, performance of the dynamic experiments in a near-zero gravity environment is suggested.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 9 , 1981 , 49
Copyright
Copyright © Materials Research Society 1982

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References

REFERENCES

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