Observations on the Sub-Critical Growth and Healing of Micro-Cracks in Brittle Ceramics

  • K. Niihara
  • J. P. Singh
  • L. D. Bentsen
  • D. P. H. Hasselman
Part of the Materials Science Research book series (MSR, volume 14)


Micro-cracking in brittle composites was monitored by measuring the temperature dependence of thermal diffusivity by the laser flash method. Depending upon the material system, micro-cracks can exhibit a time dependent growth or healing or a combination of both. A theoretical basis for these observations was established by analyzing the stability and nature of crack propagation of precursor micro-cracks in a spherical inclusion contained in an infinite matrix with different elastic properties.


Thermal Diffusivity Crack Size Crack Density Subcritical Crack Growth Crack Healing 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • K. Niihara
    • 1
  • J. P. Singh
    • 1
  • L. D. Bentsen
    • 1
  • D. P. H. Hasselman
    • 1
  1. 1.Department of Materials EngineeringVirginia Polytechnic Institute and State UniversityBlacksburgUSA

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