Chapter 19. Evaluation of the Elastic and Plastic Properties of Si3N4 by Depth Sensing Indentation

  1. John B. Wachtman Jr.
  1. R. Berriche and
  2. R. T. Holt

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch19

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

Berriche, R. and Holt, R. T. (1993) Evaluation of the Elastic and Plastic Properties of Si3N4 by Depth Sensing Indentation, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch19

Author Information

  1. Institute for Aerospace Research, National Research Council of Canada, Ottawa, ON, Canada, K1A 0R6

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • microscopy;
  • piezoelectric;
  • microcracking;
  • equations;
  • geometry

Summary

A high resolution instrument, called the nanomechanical probe, which permits continuous monitoring of load and depth of penetration during indentation and scratch tests has been developed at IAR/NRC. Its principle of operation, specifications and capabilities are discussed. Indentation tests on HIPed silicon nitride samples with densities ranging from about 82 to 99.7% theoretical density have been performed. Hardness values for each sample have been calculated from load vs. depth plots using a new method involving the plastic work dissipated during the indentation process. The elastic properties of the samples have been determined from the slope of the unloading curve using the elastic punch model. The results are compared to those obtained by conventional methods.