Chapter 32. Laser-Based Optical Scattering Detection of Surface and Subsurface Defects in Machined Si3N4 Components

  1. J. P. Singh
  1. J. G. Sun,
  2. M. Shirber and
  3. W. A. Ellingson

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294444.ch32

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4

How to Cite

Sun, J. G., Shirber, M. and Ellingson, W. A. (1997) Laser-Based Optical Scattering Detection of Surface and Subsurface Defects in Machined Si3N4 Components, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 18, Issue 4 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294444.ch32

Author Information

  1. Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL 60439

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375532

Online ISBN: 9780470294444

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Keywords:

  • resistance;
  • stiffness;
  • ceramic component;
  • ceramics;
  • longitudinal

Summary

It is known that surface and subsurface defects in ceramic components may significantly affect component strength and lifetime. An elastic optical scattering technique that uses a low-power He-Ne laser, special optical components, and digital image processing has been developed to provide two-dimensional-image type data for the detection of surface or subsurface defects in machined Si3N4 components. The technique has been used to analyze diamond ground Si3N4 specimens that were subjected to various machining conditions. The laser scattering results were processed to obtain statistical data on machining-induced damage and were correlated with machining conditions.