Chapter 42. Application of Indentation-Strength Method to R-Curve Measurements

  1. John B. Wachtman Jr.
  1. Shanti V. Nair,
  2. Peter Zheng-Quan Cai and
  3. John E. Ritter

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313978.ch42

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

How to Cite

Nair, S. V., Cai, P. Z.-Q. and Ritter, J. E. (1994) Application of Indentation-Strength Method to R-Curve Measurements, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch42

Author Information

  1. Mechanical Engineering Department, University of Massachusetts, Amherst, MA 01003

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375198

Online ISBN: 9780470313978

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Keywords:

  • turbomilling;
  • formulations;
  • theoretical densities;
  • flexural;
  • characteristics

Summary

Technique for the measurement of toughness by the indentation-strength method, originally developed for materials that do not exhibit R-curve behavior, is extended in a general way to the measurement of the fracture resistance, Kr, for materials that exhibit a rising toughness with crack size. The R-curve was evaluated by this technique for alumina AD995 and a nanoporous RBSN reinforced with 38vol% of 15μm SiC particles. The magnitude of the fracture resistance, KR, determined by the indentation-strength method agreed with fracture resistance data obtained independently for the fully dense alumina ceramic.