Journal of Materials Science

, Volume 26, Issue 10, pp 2711–2715 | Cite as

Influence of grain size and degree of crystallization of intergranular glassy phase on the mechanical behaviour of a debased alumina

  • N. P. Padture
  • H. M. Chan
Papers

Abstract

The influence of microstructure on the crack resistance (R-curve) behaviour of a commercial debased alumina containing large amounts of glassy phase (28 vol%) has been studied by strength measurements at controlled flaw sizes produced by indentation. Both the individual and combined effects of (a) grain size, and (b) intergranular second phase (glassy or crystalline) were evaluated. Enhancement of theR-curve behaviour was observed when the average grain size was increased from 3–18 μm by thermal treatment. However, no effect of the degree of crystallinity of the intergranular second phase on theR-curve behaviour, in either small or large-grained materials, was observed. These results are discussed with reference to the influence of grain-boundary residual stresses on grain bridging across the crack interface.

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References

  1. 1.
    R. Knehans andR. W. Steinbrech,J. Mater. Sci. Lett. 1 (1982) 327.CrossRefGoogle Scholar
  2. 2.
    R. W. Steinbrech, R. Knehans andW. Schaarwachter,J. Mater. Sci. 18 (1983) 265.CrossRefGoogle Scholar
  3. 3.
    R. F. Cook, B. R. Lawn andC. J. Fairbanks,J. Amer. Ceram. Soc. 68 (1985) 604.Google Scholar
  4. 4.
    M. V. Swain,J. Mater. Sci. Lett. 5 (1986) 1313.Google Scholar
  5. 5.
    A. Reichl andR. W. Steinbrech,J. Amer. Ceram. Soc. 71 (1988) C299.CrossRefGoogle Scholar
  6. 6.
    S. J. Bennison andB. R. Lawn,J. Mater. Sci. 24 (1989) 3169.CrossRefGoogle Scholar
  7. 7.
    K. Kendal, N. McN. Alford, S. R. Tan andJ. D. Birchall,J. Mater. Res. 1 (1986) 120.Google Scholar
  8. 8.
    R. F. Cook andD. R. Clarke,Acta Metall. 36 (1988) 555.Google Scholar
  9. 9.
    D. K. Shetty andJ. S. Wang,J. Amer. Ceram. Soc. 72 (1989) 1158.CrossRefGoogle Scholar
  10. 10.
    P. L. Swanson, C. J. Fairbanks, B. R. Lawn, Y-W. Mai andB. J. Hockey,ibid. 70 (1987) 279.CrossRefGoogle Scholar
  11. 11.
    S. J. Bennison andB. R. Lawn,Acta Metall. 37 (1989) 2659.Google Scholar
  12. 12.
    Y-W. Mai andB. R. Lawn,J. Amer. Ceram. Soc. 70 (1987) 289.CrossRefGoogle Scholar
  13. 13.
    S. J. Bennison, H. M. Chan andB. R. Lawn,ibid. 72 (1989) 677.CrossRefGoogle Scholar
  14. 14.
    N. A. Travitzky, D. G. Brandon andE. Y. Gutmanas,Mater. Sci. Engna 71 (1985) 65.Google Scholar
  15. 15.
    Idem., ibid. 71 (1985) 77.Google Scholar
  16. 16.
    Y. Yeshurun, Z. Rosenburg, N. A. Travitzky andD. G. Brandon,ibid. 71 (1985) 71.Google Scholar
  17. 17.
    W. A. Zdaniewski andH. P. Kirchner,Adv. Ceram. Mater. 1 (1986) 99.Google Scholar
  18. 18.
    H. Tomaszewski,Ceram. Int. 14 (1988) 93.Google Scholar
  19. 19.
    C. A. Powell-Doğan andA. H. Heuer,J. Amer. Ceram. Soc., J. Amer. Ceram. Soc. 73 (1990) 3684.Google Scholar
  20. 20.
    D. B. Marshall,Amer. Ceram. Soc. Bull. 59 (1980) 551.Google Scholar
  21. 21.
    R. J. Roark, in “Formulas for Stress and Strain” (McGraw-Hill, New York, 1965) Ch. 7.Google Scholar
  22. 22.
    S. M. Wiederhorn, B. J. Hockey andR. F. Krause Jr, in “Ceramic Microstructures '86”, edited by J. Pask and A. G. Evans (Plenum, New York, 1988) p. 795.Google Scholar
  23. 23.
    L. Klein andD. R. Uhlmann,J. Geophys. Res. 79 (1974) 4869.Google Scholar
  24. 24.
    C. P. Alpert, H. M. Chan, S. J. Bennison andB. R. Lawn,J. Amer. Ceram. Soc. 71 (1988) C371.CrossRefGoogle Scholar
  25. 25.
    P. Chantikul, S. J. Bennison andB. R. Lawn,ibid.,73 (1990) 2419.CrossRefGoogle Scholar
  26. 26.
    D. Weyl,Ber. Deut. Keram. Ges. 36 (1959) 319.Google Scholar
  27. 27.
    J. Selsing,J. Amer. Ceram. Soc. 44 (1961) 419.Google Scholar
  28. 28.
    G. Bayer,Proc. Brit. Ceram. Soc. 22 (1973) 39.Google Scholar
  29. 29.
    M. Czank andH. Schulz,Naturwiss. 54 (1971) 94.Google Scholar
  30. 30.
    J. V. Smith andW. L. Brown, in “Feldspar Minerals”, Vol. 1 (Springer-Verlag, Berlin, 1988) Ch. 12.Google Scholar
  31. 31.
    N. Bansal andR. H. Doremus, in “Handbook of Glass Properties” (Academic Press, Orlando, 1986) Ch. 9.Google Scholar

Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • N. P. Padture
    • 1
  • H. M. Chan
    • 1
  1. 1.Department of Materials Science and EngineeringLehigh UniversityBethlehemUSA

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