Factors Affecting the Thermal Shock Behavior of Yttria Stabilized Hafnia Based Graphite and Tungsten Composites

  • L. D. Lineback
  • C. R. Manning
Conference paper
Part of the Materials Science Research book series (MSR, volume 5)

Abstract

Hafnia-based composites containing either graphite or tungsten were investigated as rocket nozzle throat inserts in solid propellant rocket engines. The thermal shock resistance of these materials is considered in terms of macroscopic thermal conductivity, thermal expansion, modulus of elasticity (E), and compressive fracture stress (σE). The effect of (a) degree of hafnia stabilization, (b) density, and (c) graphite or tungsten content upon these parameters is discussed. The variation of the σE /E ratio with density and its effect upon thermal shock resistance of these materials is discussed in detail.

Keywords

Graphite Carbide Tungsten Milling Explosive 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    H. Carslow and J. Jaeger, Conductivity of Heat in Solids, Claredon Press, Oxford, England. 1959.Google Scholar
  2. 2.
    B. Boley and J. Weiner, Theory of Thermal Stresses, John Wiley and Sons, New York, 1960.Google Scholar
  3. 3.
    S. Manson, in Mechanical Behavior at Elevated Temperatures, J. E. Dorn, ed.McGraw-Hill Book Co., New York, 1961.Google Scholar
  4. 4.
    P. Duwez and F. Odell, J. Am. Ceram. Soc. 32 (5) 180 (1949).CrossRefGoogle Scholar
  5. 5.
    J. D. Buckley, “Stabilization of the Phase Transformation in Hafnium Oxide” Ph.D. Thesis, Iowa State University, Ames, Iowa. 1967.Google Scholar
  6. 6.
    American Society for Testing Materials “Standard Method of Test for Linear Expansion of Whiteware” ASTM Designation C 327–56Google Scholar
  7. 7.
    G. Haacke and D. P. Spitzer, J. Sci. Instrum. 42 702 (1965).CrossRefGoogle Scholar
  8. 8.
    R. Sharma, J. Appl. Mech. 23 (4) 527 (1956).Google Scholar
  9. 9.
    Ya. Fridmar, Strength and Deformation in Nonuniform Thermal Fields, Consultants Bureau, New York, 1964.Google Scholar
  10. 10.
    D. R. Flynn, in Mechanical and Thermal Properties of Ceramics. J. B. Waclitraan Ed., National Bureau of Standards Special Publication 303. 1969.Google Scholar

Copyright information

© Plenum Press, New York 1971

Authors and Affiliations

  • L. D. Lineback
    • 1
  • C. R. Manning
    • 1
  1. 1.North Carolina State UniversityUSA

Personalised recommendations