Radiative Contribution to the Thermal Diffusivity and Conductivity of a Silicon Carbide Fiber Reinforced Glass-Ceramic

  • L. D. Bentsen
  • D. P. H. Hasselman
  • J. J. Brennan


The thermal diffusivity and conductivity of a silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic was measured using the laser-flash method. As indicated by the effect of specimen thickness on thermal conductivity and its positive temperature dependence, heat transfer by radiation makes a significant contribution to the total thermal conductivity. The observed dependence of the effect of specimen thickness on thermal conductivity suggests that radiative heat transfer between the carbon coated surfaces of dielectric materials for the laser-flash technique may be partially governed by the view factor between the specimen surfaces.


Thermal Conductivity Thermal Diffusivity Specimen Thickness View Factor Total Thermal Conductivity 
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  1. 1.
    R. Berman, “Thermal Conduction in Solids”, Clarendon Press, Oxford (1976).Google Scholar
  2. 2.
    D. W. Lee and W. D. Kingery, J. Amer. Ceram. Soc., 43 (1960) 594.CrossRefGoogle Scholar
  3. 3.
    J. J. Brennan, L. D. Bentsen and D. P. H. Hasselman, J. Mater. Sci., 17 (1982) 2337.Google Scholar
  4. 4.
    S. Yajima, K. Okamura, J. Hayashi and M. Omori, J. Amer. Ceram. Soc., 59 (1976) 324.CrossRefGoogle Scholar
  5. 5.
    W. J. Parker, R. J. Jenkins, C. P. Butler and G. L. Abbott, J. Appl. Phys., 32 (1961) 1679.Google Scholar
  6. 6.
    R. C. Heckman, J. Appl. Phys., 44 (1973) 1455.Google Scholar
  7. 7.
    A. E. Powers, Knolls Atomic Power Laboratory, Report KAPL-2145, 1961.Google Scholar
  8. 8.
    W. A. Gray, and R. Muller, “Engineering Calculations in Radiative Heat Transfer”, ( Pergamon Press, New York, 1974 ), p. 29.Google Scholar
  9. 9.
    R. Siegel and J. R. Howell, “Thermal Radiation Heat Transfer”, ( McGraw-Hill, New York, 1972 ) p. 787.Google Scholar
  10. 10.
    S. P. Howiett, R. Taylor, and R. Morrell, “Thermal Conductivity-17”, (Plenum Press, New York, 1983), p. 447, J. G. Hust, Ed.Google Scholar

Copyright information

© Purdue Research Foundation 1985

Authors and Affiliations

  • L. D. Bentsen
    • 1
  • D. P. H. Hasselman
    • 1
  • J. J. Brennan
    • 2
  1. 1.Department of Materials EngineeringVirginia Polytechnic Institute and State UniversityBlacksburgUSA
  2. 2.United Technologies Research CenterEast HartfordUSA

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