Advertisement

Nonbasal Slip in Alumina at High Temperatures and Pressures

  • A. H. Heuer
  • R. F. Firestone
  • J. D. Snow
  • J. Tullis
Part of the Materials Science Research book series (MSR, volume 5)

Abstract

Czochralski (0°) sapphire has been deformed in tensile creep at 1600–1800°C., and fine-grained alumina polycrystals have been deformed under hydrostatic confining pressure at 1000–1200°C., in order to activate nonbasal deformation modes. The tensile creep data is in agreement with Nabarro-climb, although evidence for pyramidal slip on the {1102} planes was also observed. Either of these deformation modes, in conjunction with basal and prismatic plane slip, permit general deformation of polycrystalline specimens. In addition, “water weakening” was observed to occur in the deformation of polycrystalline alumina under hydrostatic confining pressures.

Keywords

Slip System Critical Resolve Shear Stress Basal Slip Pyramidal Slip Tensile Creep 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. B. Wachtman, Jr. and L. H. Maxwell, J. Amer. Ceram. Soc. 37 291 (1954).CrossRefGoogle Scholar
  2. 2.
    M. L. Kronberg, Acta Met. 5 507 (1957); ibid, J. Amer. Ceram. Soc. 45 274 (1962).CrossRefGoogle Scholar
  3. 3.
    H. Conrad, J. Amer. Ceram. Soc., 48 195 (1965).CrossRefGoogle Scholar
  4. 4.
    G. W. Groves and A. Kelly, Phil. Mag., 8 877 (1963).CrossRefGoogle Scholar
  5. 5.
    M. V. Klassen-Neklyudova, J. Tech. Phys. (U.S.S.R.), 12 519, 535 (1942).Google Scholar
  6. 6.
    M. V. Klassen-Neklyudova and G. E. Tomilevskii, Trudy Inst. Krist. Akad. Nauk., U.S.S.R., 8 237 (1953).Google Scholar
  7. 7.
    R. Scheuplein and P. Gibbs, J. Amer. Ceram. Soc., 43 450 (1960); ibid, 45 439 (1962).Google Scholar
  8. 8.
    T. D. Gulden, J. Amer. Ceram. Soc., 50 472 (1967).CrossRefGoogle Scholar
  9. 9.
    D. J. Barber and N. J. Tighe, Phil. Mag., 11 495 (1965); ibid, 14, 531 (1966).Google Scholar
  10. 10.
    G. W. Groves and A. Kelly, Phil. Mag., 19 977 (1969).CrossRefGoogle Scholar
  11. 11.
    F. R. N. Nabarro, Phil. Mag., 16 231 (1967).CrossRefGoogle Scholar
  12. 12.
    J. B. Wachtman, Jr. and L. H. Maxwell, J. Amer. Ceram. Soc., 40 377 (1957).CrossRefGoogle Scholar
  13. 13.
    A. H. Heuer, Phil. Mag., 13. 379 (1966).CrossRefGoogle Scholar
  14. 14.
    P. D. Bayer and R. E. Cooper, J. Mater. Sci., 2 301 (1967).CrossRefGoogle Scholar
  15. 15.
    A. H. Heuer, R. M. Cannon, and N. J. Tighe; in Ultrafine-Grain Ceramics. EdsJ. J. Burke, N. L. Reed, and V. Weiss, Syracuse University Press, Syracuse, N. Y. 1970.Google Scholar
  16. 16.
    A. H. Heuer, R. F. Firestone, J. D. Snow and J. Tullis, to be published in the Proc. 2nd Int. Conf. on The Strength of Metals and Alloys, Amer. Soc. Metals.Google Scholar
  17. 17.
    R. F. Firestone and A. H. Heuer, to be published.Google Scholar
  18. 18.
    A. H. Heuer, J. D. Snow, B. J. Hockey, and J. Tullis, to be published.Google Scholar
  19. 19.
    A. H. Heuer and J. P. Roberts, Proc. Brit. Ceram. Soc., 6 17 (1966),Google Scholar
  20. 20.
    W. J. Weertman, Trans. ASM, 61 6811 (1968).Google Scholar
  21. 21.
    Y. Gishi and W. D. Kingery, J. Chem. Phys., 33 480 ( 1960.CrossRefGoogle Scholar
  22. 22.
    N. Soga and 0. L. Anderson, J. Amer. Ceram. Soc. 49 355 (1966).Google Scholar
  23. 23.
    P. Shahinian, J. Amer. Ceram. Soc., 54 67 (1971).CrossRefGoogle Scholar
  24. 24.
    Effect of Pressure on Mechanical Behavior of Materials. Ed. H. L. L. D. Pugh, Elsevier Press (The Netherlands), 1970.Google Scholar
  25. 25.
    a) C. W. Weaver and M. S. Patterson, J. Amer. Ceram. Soc., 52 293 (1969); (b) M. S. Patterson, C. W. Weaver, Ibid, 53 463 (1970); (c) T. A. Auten, Ph.D. thesis. Case Western Reserve University, Cleveland, Ohio. 1970.Google Scholar
  26. 26.
    D. T. Griggs, Geophys. J. Roy. Ast. Soc., 14 19 (1967).Google Scholar
  27. 27.
    R. W. Armstrong, Metal Trans., 1 1169 (1970).Google Scholar
  28. 28.
    D. T. Griggs and J. D. Blacic, Science, 147 292 (1965).CrossRefGoogle Scholar
  29. 29.
    R. A. Waugh, Ph.D. Thesis, University of Leeds, Leeds. U.K. 1969.Google Scholar
  30. 30.
    M. V. Klassen-Neklyudova, V. G. Govorkov, A. A. Urusovskaya, M. N. Voinova and E. P. Kozlovskaya, Phys. Stat. Solidi, 39 679 (1970).CrossRefGoogle Scholar
  31. 31.
    V. N. Rozhanskii, M. P. Nazarova, I. L. Svetlov and L. K. Kalashnidova, in Proceedings of a Conference on Deformation Hardening of Single Crystals, Charkov, 1969.Google Scholar
  32. 32.
    B.J. Hockey, submitted for publication, J. Amer. Ceram. Soc.Google Scholar

Copyright information

© Plenum Press, New York 1971

Authors and Affiliations

  • A. H. Heuer
    • 1
  • R. F. Firestone
    • 1
  • J. D. Snow
    • 2
  • J. Tullis
    • 3
  1. 1.Case Western Reserve UniversityClevelandUSA
  2. 2.Ferro CorporationClevelandUSA
  3. 3.University of California at Los AngelesLos AngelesUSA

Personalised recommendations