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Influence of Grain Boundary Silica Impurity on Alumina Toughness

  • J. S. Moya
  • W. M. Kriven
  • J. A. Pask
Part of the Materials Science Research book series (MSR, volume 14)

Abstract

In a series of previous reports the effect of silica impurity on aggregation state and on electrophoretic, pressing, filtering and sintering behavior on alumina powders has been studied. The results obtained showed that the silica surface impurity plays an important role in the ceramic processing of powders by (a) decreasing pH values of the isoelectric point (i. e. p.), which affects the aggregation state of the powder, and (b) decreasing the compactability and the activation energy for the initial stage of sintering.

Keywords

Stress Intensity Factor Aggregation State Alumina Powder Boundary Groove Untreated Alumina 
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.
    J. A. Pask, Bull. Am. Ceram. Soc, 58:1163 (1979).Google Scholar
  2. 2.
    J. S. Moya, J. Rubio and J. A. Pask, Bull. Am. Ceram. Soc, in press.Google Scholar
  3. 3.
    J. S. Moya and J. A. Pask. To be published in the Proc. of the 9th International Symposium of the Reactivity of Solids, Cracow, Poland, 1980.Google Scholar
  4. 4.
    P. L. Fulraan, Trans. AIME, 197:447 (1953).Google Scholar
  5. 5.
    A. G. Evans and E. A. Charles, J. Am. Ceram. Soc, 59:371 (1976).CrossRefGoogle Scholar
  6. 6.
    N. Claussen, R. Pabst and C. P. Lahmann, Proc. Brit. Ceram. Soc. 24:139 (1975).Google Scholar
  7. 7.
    B. J. Dalgleish, P. L. Pratt and J. Sandford, Science of Ceramics, Vol. 8:225 (1976).Google Scholar
  8. 8.
    N. Claussen, J. Am. Ceram. Soc. 59:49 (1976).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • J. S. Moya
    • 1
  • W. M. Kriven
    • 2
  • J. A. Pask
    • 2
  1. 1.Instituto de Ceramica y VidrioMadridSpain
  2. 2.Materials and Molecular Research Division, Lawrence Berkeley Laboratory and Department of Materials Science and Mineral EngineeringUniversity of CaliforniaBerkeleyUSA

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