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Journal of Materials Science

, Volume 27, Issue 10, pp 2749–2752 | Cite as

Thermal properties of MoSi2 and SiC whisker-reinforced MoSi2

  • S. Bose
  • R. J. Hecht
Papers

Abstract

The heat capacity, thermal conductivity and coefficient of thermal expansion of MoSi2 and 18 vol % SiC whisker-reinforced MoSi2 were investigated as a function of temperature. The materials were prepared by hot isostatic pressing between 1650 and 1700 °C, the hold time at temperature being 4 h. The heat capacity of MoSi2 showed an increase from about 0.44 Wsg−11K−1 at room temperature to 0.53 at 700 °C. Whisker reinforcement increased heat capacity by about 10%. Thermal conductivity exhibited a decreasing trend from 0.63 Wcm−1 K−1 at room temperature to 0.28 Wem−1 K−1 at 1400°C. Whiskers reduced conductivity by about 10%. The thermal expansion coefficient increased from 7.42 °C−1 between room temperature and 200 °C to 9.13 °C−1 between room temperature and 1200 °C. There was a 10% decrease resulting from the whiskers. The measured data are compared with literature values. The trends in the data and their potential implications for high-temperature aerospace applications of MoSi2 are discussed.

Keywords

Polymer Thermal Conductivity Heat Capacity Thermal Expansion Thermal Property 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    F. D. Gac and J. J. Petrovic, J. Amer. Ceram. Soc. 68 (1985) C200–201.CrossRefGoogle Scholar
  2. 2.
    S. Bose and R. J. Hecht, to be published.Google Scholar
  3. 3.
    R. Wehrmann, in “High-Temperature Materials and Technology”, edited by I. E. Campbell and E. M. Sherwood (Wiley, New York, 1967) p. 399.Google Scholar
  4. 4.
    “Engineering Properties of Selected Ceramic Materials”, compiled by Battelle Memorial Institute Columbus Laboratories, Columbus, Ohio (The American Ceramic Society, Columbus, OH, 1966) 5.7.3–2.Google Scholar
  5. 5.
    “HexaloyTM Sintered Alpha Silicon Carbide Technical Information” (The Carborundum Co., Niagara Falls, NY, 1984).Google Scholar
  6. 6.
    R. A. Long, “Fabrication and Properties of Hot-Pressed Molybdenum Disilicide”, Technical Report, NACA RM E50F22, August 1950.Google Scholar
  7. 7.
    W. D. Kingery, H. K. Bowen and D. R. Uhlmann, “Introduction to Ceramics” (Wiley, New York, 1976) p. 604.Google Scholar

Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • S. Bose
    • 1
  • R. J. Hecht
    • 2
  1. 1.Materials EngineeringPratt and WhitneyEast HartfordUSA
  2. 2.Materials EngineeringPratt and WhitneyWest Palm BeachUSA

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