Modification of the Density-Pressure Relationship due to the Internal Friction and Cohesion of a Powder Mass Undergoing Closed Die Compaction

Abstract:

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The existing density-pressure laws for a powder undergoing die compaction fit experimental data very well except for the low-pressure end of curves for some materials (SiC, Al2O3). To improve this, density - pressure relationship was modified by considering the internal friction and cohesion. For constant internal friction and vanishing cohesion, the modified relationship became mathematically equivalent to the existing one. For density-dependent friction, the modified and original relationships were able to provide nearly the same densities at medium and higher pressures but slightly different values at the low-pressure region.

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Periodical:

Edited by:

J. Dusza, R. Danzer, R. Morrell and G.D. Quinn

Pages:

334-337

DOI:

10.4028/www.scientific.net/KEM.409.334

Citation:

M. Kupková "Modification of the Density-Pressure Relationship due to the Internal Friction and Cohesion of a Powder Mass Undergoing Closed Die Compaction", Key Engineering Materials, Vol. 409, pp. 334-337, 2009

Online since:

March 2009

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$35.00

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