Ceramic powder compaction Page: 1 of 16
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})) 0'15-Id64 C.
To be published in the proceedings of the American Ceramic Society International Symposium on
Manufacturing Practices and Technology, New Orleans, LA, Nov. 5-8, 1995.
CERAMIC POWDER COMPACTION
S. Jill Glass and Kevin G. Ewsuk d ' _
Sandia National Laboratories
Albuquerque, NM 87185 ( J
F. Michael Mahoney
Norton Company
Worcester, MA 01615
ABSTRACT
With the objective of developing a predictive model for ceramic
powder compaction we have investigated methods for characterizing
density gradients in ceramic powder compacts, reviewed and
compared existing compaction models, conducted compaction
experiments on a spray dried alumina powder, and conducted
mechanical tests and compaction experiments on model granular
materials. Die filling and particle packing, and the behavior of
individual granules play an important role in determining
compaction behavior and should be incorporated into realistic
compaction models. These results support the use of discrete
element modeling techniques and statistical mechanics principals
to develop a comprehensive model for compaction, something that
should be achievable with computers with parallel processing
capabilities.
INTRODUCTION
In the manufacture of advanced ceramics, optimum properties are
achieved by defining and developing processes to produce a target
microstructure, and by controlling processing to minimize the
concentration and scale of the defects in the finished product. To
manufacture ceramics with reliable and reproducible properties, it
is imperative to understand and control process-microstructure-
property relations during the various stages of processing.
Consolidation is an important part of ceramic processing that
comprises processes ranging from green body forming to thermal
consolidation (e.g., sintering). The most common methods of
forming for high volume components are uniaxial pressing and
isostatic pressing.1~4 Both processes use granulated powders
because of their improved flowability and ease of handling
This work was supported by the United
States Department of Energy under
Contract DE-ACO4-94AL5000.
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Glass, S. J.; Ewsuk, K. G. & Mahoney, F. M. Ceramic powder compaction, article, December 31, 1995; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc670915/m1/1/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.