Characterizing powders for dry pressing sintering

Powder pressing is an economical method of forming ceramic components that involves compacting a powder in a die at pressures ranging from about 21 to 210 MPa. The objective is to form a nominally defect-free powder compact to near-net shape. Economically, net-shape forming is highly desirable, beca...

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Bibliographic Details
Published in:American Ceramic Society bulletin 2003, Vol.82 (5), p.41-47
Main Authors: EWSUK, K. G, ARGUELLO, J. G, BENCOE, D. N, ELLERBY, D. T, GLASS, S. J, ZEUCH, D. H, ANDERSON, J
Format: Magazinearticle
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
General studies
Technical ceramics
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Summary:Powder pressing is an economical method of forming ceramic components that involves compacting a powder in a die at pressures ranging from about 21 to 210 MPa. The objective is to form a nominally defect-free powder compact to near-net shape. Economically, net-shape forming is highly desirable, because it minimises waste and can eliminate expensive finish machining (i.e., diamond grinding). Net-shape compaction is achieved by minimising density gradients during processing. Manufacturing reproducibility is achieved by controlling characteristics and compaction behaviour of the press powder as well as by controlling the powder pressing process. The techniques for characterising powders and powder compacts, and the process of powder pressing and compaction, are reviewed. A model is developed that explores the relationships between the powder characteristics and pressing behaviour. 36 refs.
ISSN:0002-7812
1945-2705