Origin of Flaws from Ceramic Processing

  • W. Roger Cannon


Ceramics present a particular challenge for NDE. Except for some of the most recently developed ceramic-ceramic composites, ceramics fail from pre-existing flaws. NDE is particularly difficult to use for the high technology ceramic parts such as automobile engine or other high reliability structural parts. These parts are required to withstand a high design stress which infers that the critical flaw size be very small. The flaw size is usually outside the limits of NDE detection. Since all ceramic materials of importance are essentially brittle, one can estimate the flaw size from the linear elastic fracture mechanics,
$$\sigma = {K_C}/\pi c$$


Residual Stress Linear Elastic Fracture Mechanic Fracture Origin Tape Casting Critical Flaw Size 


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Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • W. Roger Cannon
    • 1
  1. 1.Department of CeramicsRutgers UniversityPiscatawayUSA

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