Chapter 24. Developing a Standard Test Method for Pyroplastic Deformation

  1. Willam M. Carty
  1. Hyojin Lee,
  2. Aubree Buchtel and
  3. W. M. Carty

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294796.ch24

Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2

Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2

How to Cite

Lee, H., Buchtel, A. and Carty, W. M. (2008) Developing a Standard Test Method for Pyroplastic Deformation, in Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294796.ch24

Author Information

  1. Whiteware Research Center Alfred University, Alfred, NY

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375822

Online ISBN: 9780470294796

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Keywords:

  • MOR relationship;
  • pyroplastic;
  • deformation

Summary

Pyroplastic deformation of whiteware bodies has been measured using several different approaches, making it difficult to correlate the results from different studies. It is proposed that a standard test method be developed that uses the weight of the sample, and the resulting MOR stress (assuming a 3-point bending approximation) by adjusting the span length. Preliminary results illustrate that a 50 kPa stress level is sufficient to easily discern pyroplastic deformation differences between bodies in the first firing cycle. By adjusting the span to create a specific stress level on the tensile side of the sample, it is possible to compare pyroplastic deformation results for samples of different size and geometry. In situations in which multiple firings are encountered, it is proposed that a 200 kPa stress level is necessary.