Chapter 13. Dynamic Analysis of Temperature—Stress Fields During Pressureless Sintering and Hot-Pressing

  1. John B. Wachtman Jr.
  1. D. Orlicki,
  2. S. Majorowski,
  3. J. A. Puszynski and
  4. V. Hlavacek

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313107.ch13

Ceramic Manufacturing Council - Kilns and Firing: Ceramic Engineering and Science Proceedings, Volume 11, Issue 11/12

Ceramic Manufacturing Council - Kilns and Firing: Ceramic Engineering and Science Proceedings, Volume 11, Issue 11/12

How to Cite

Orlicki, D., Majorowski, S., Puszynski, J. A. and Hlavacek, V. (1990) Dynamic Analysis of Temperature—Stress Fields During Pressureless Sintering and Hot-Pressing, in Ceramic Manufacturing Council - Kilns and Firing: Ceramic Engineering and Science Proceedings, Volume 11, Issue 11/12 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313107.ch13

Author Information

  1. Chemical Engineering Department New York State University Amherst, NY

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780470374962

Online ISBN: 9780470313107

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Keywords:

  • hot-pressing;
  • during pressureless sintering;
  • sintering and hot-pressing.;
  • ceramic firing procedures;
  • numerical sirnulorion

Summary

In the fabrication of ceramic material, densification is always a critical step. There exist various techniques of obtaining dense ceramic materials, the most common of which are pressureless sintering and hot-pressing. Other methods, such as hot isostatic pressing and chemical vapor deposition, are more expensive and are used less frequently.

Pressureless sintering and hot-pressing have been used in industry for decades, but they still pose problems to be explored. One of the impediments in the successful implementation of engineered material is the consistent densification of ceramic parts. Ceramic firing procedures may result in obtaining nonhomogeneous and nonisotropic products. The traditional trial and error techniques for establishing the technological parameters, even when supported by accumulated experimental material, becomes very expensive.

In order to reduce experimental effort, and to better understand the conditions required for densification of ceramic materials, we have carried out a detailed mathematical analysis.

The results of numerical simulation of temperature fields during hot-pressing have been compared with our experimental data. Good quantitative agreement was achieved. The model was extended for the analysis of chemical hot-pressing. The computer code can be used for analysis and development of new and already existing equipment, as well as for optimization of densfication conditions.