Chapter 4. Green Testing of Pressed Compacts
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1993 The American Ceramics Society
A Collection of Papers on Engineering Aspects of Fabrication of Ceramics: Ceramic Engineering and Science Proceedings, Volume 14, Issue 11/12
How to Cite
Walker, W. J. and Reed, J. S. (1993) Green Testing of Pressed Compacts, in A Collection of Papers on Engineering Aspects of Fabrication of Ceramics: Ceramic Engineering and Science Proceedings, Volume 14, Issue 11/12 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314272.ch4
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375280
Online ISBN: 9780470314272
Green compacts were prepared by pressing spray-dried alumina containing different binders. The diametral compression test was used to measure green tensile strength using a relatively inexpensive pneumatic crush strength tester. Modifications to the strength tester were made to measure the force needed to eject compacts from the die. The ejection pressure was very dependent on die wall lubrication provided by the binder system. Control of relative humidity during testing proved critical for reliable strength data. Green strength of compacts was observed to depend strongly on the joining of pressed granules at interfaces and was less dependent on the intrinsic binder film strength.