Abstract
The thermal diffusivity of brittle coatings cannot be measured by the flash method directly because of the difficulty of preparing free-standing samples. Adopting the flash method using a two-layer composite sample, it is possible to measure thermal diffusivity if the radiant pulse is well defined and good thermal contact on the interface of the composite sample can be ensured. Using an equilateral trapezoidal pulse of an Nd-glass laser measuring the dimensionless temperature history of the rear face of the sample, we determined the thermal diffusivity of thermal control coatings in the temperature range of 80 to 200°C. The results for different thicknesses of substrate showed that the thermal contact resistance of the interface can be neglected.
Similar content being viewed by others
REFERENCES
W. J. Parker, R. J. Jenkins, C. P. Butler, and G. L. Abbott, J. Appl. Phys. 32:1679 (1961).
H. Wang, G. H. He, B. L. Zhou, and X. Chen, in Proc. Third Asian Thermophys. Props. Conf., Beijing, China (1992), p. 527.
G. H. He, J. P. Tao, D. J. Cao, S. Q. Dong, H. Wang, and B. L. Zhou, in Proc. First European Conf. Thermoelec., Cardiff, United Kingdom (1987), p. 142.
F. Seitz, The Modern Theory of Solids (McGraw-Hill, New York, 1940), p. 38.
J. J. Hoefler and R. E. Taylor, Int. J. Thermophys. 11:1099 (1990).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
He, G.H., Guo, J.D., Zhang, Y.Y. et al. Measurement of Thermal Diffusivity of Thermal Control Coatings by the Flash Method Using Two-Layer Composite Sample1 . International Journal of Thermophysics 21, 535–542 (2000). https://doi.org/10.1023/A:1006660318958
Issue Date:
DOI: https://doi.org/10.1023/A:1006660318958