Journal of Materials Science

, Volume 14, Issue 7, pp 1662–1668 | Cite as

The crack-initiation threshold in ceramic materials subject to elastic/plastic indentation

  • James Lankford
  • David L. Davidson


The threshold for indentation cracking is established for a range of ceramic materials, using the techniques of scanning electron microscopy and acoustic emission. It is found that by taking into account indentation plasticity, currant theories may be successfully combined to predict threshold indentation loads and crack sizes. Threshold cracking is seen to relate to radial rather than median cracking.


Polymer Microscopy Electron Microscopy Scanning Electron Microscopy Acoustic Emission 
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  1. 1.
    B. R. Lawn andA. G. Evans,J. Mater. Sci. 12 (1977) 2195.Google Scholar
  2. 2.
    C. M. Perrott,Wear 45 (1977) 293.Google Scholar
  3. 3.
    J. Lankford, ″Fracture Mechanics of Ceramics, Vol. 3, edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum, New York, 1978) p. 245.Google Scholar
  4. 4.
    B. J. Hockey, ″The Science of Hardness Testing and its Research Applications″, edited by J. H. Westbrook and H. Conrad (American Society for Metals, Metals Park, Ohio, 1973) p. 30.Google Scholar
  5. 5.
    B. R. Lawn, T. Jensen andA. Arora,J. Mater. Sci. 11 (1976) 575.Google Scholar
  6. 6.
    B. R. Lawn andE. R. Fuller,ibid 10 (1975) 2016.Google Scholar
  7. 7.
    T. Sata, K. Takamoto andH. Yoshikawa,Bull. Jap. Soc. Prec. Eng. 3 (1969) 13.Google Scholar
  8. 8.
    J. Lankford andD. L. Davidson,J. Mater. Sci. 14 (1979) 1669.Google Scholar
  9. 9.
    B. J. Hockey, S. M. Weiderhorn andH. Johnson, ″Fracture Mechanics of Ceramics″, Vol. 3, edited by R. C. Bradt, D. P. Hasselman and F. F. Lange (Plenum, New York, 1978) p. 379.Google Scholar

Copyright information

© Chapman and Hall Ltd 1979

Authors and Affiliations

  • James Lankford
    • 1
  • David L. Davidson
    • 1
  1. 1.Southwest Research InstituteSan AntonioUSA

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