Defect engineering of samples for Non-Destructive Evaluation (NDE) ultrasound testing

Raymond Brennan, Richard Haber, Dale Niesz, James McCauley

Research output: Contribution to journalConference articlepeer-review


Defect engineered samples were successfully fabricated by introducing hollow polymer spheres into the bulk of pressed A1 2O 3 samples. The polymer spheres burned out at ∼525°C during sintering of the samples at 1600°C for three hours. An ultrasound C-scan system was used to nondestructively image the spherical pores within the matrix by gating several regions of the bulk and detecting large attenuation changes in the sample. The C-scans revealed different spherical pore distributions for three different gated thickness regions within the bulk. Microscopy was used to evaluate the cross-section of one of the defect engineered samples, and spherical pores were located, confirming the presence of the engineered defects and adding legitimacy to the results of the ultrasound C-scan study.

Original languageAmerican English
Pages (from-to)103-108
Number of pages6
JournalCeramic Transactions
StatePublished - 2006
Event107th Annual Meeting of the American Ceramic Society - Baltimore, MD, United States
Duration: Apr 10 2005Apr 13 2005

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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