Influence of Pressure Oscillation on the Compaction of Powder Mixtures Containing Soft and Hard Components

  1. B. Jouffrey
  1. Antonios Zavaliangos1 and
  2. Alexander Laptev2

Published Online: 9 MAY 2006

DOI: 10.1002/3527606165.ch48

Microstructural Investigation and Analysis, Volume 4

Microstructural Investigation and Analysis, Volume 4

How to Cite

Zavaliangos, A. and Laptev, A. (2000) Influence of Pressure Oscillation on the Compaction of Powder Mixtures Containing Soft and Hard Components, in Microstructural Investigation and Analysis, Volume 4 (ed B. Jouffrey), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606165.ch48

Author Information

  1. 1

    Department of Materials Engineering, Drexel University, 32nd and Chestnut Streets, Philadelphia, PA 19104, USA

  2. 2

    Department of Mechanical Engineering, Donbass State Engineering Academy, Shkadinova 72, Kramatorsk 343913, Ukraine

Publication History

  1. Published Online: 9 MAY 2006
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301218

Online ISBN: 9783527606160

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Keywords:

  • microstructural investigation;
  • metal matrix composites;
  • compactation of powder mixtures containing soft and hard components;
  • influence of pressure oscillation

Summary

The effect of pressure cycling on the densification and ejection of Pb-Al2O3 powder-mixtures is investigated and compared to static loading for volume fractions of Al2O3, between 0 and 80 %. The density of all mixtures increases with time under constant pressure even at room temperature. This mechanical behavior is the result of the creep of lead. This effect diminishes with increasing volume fraction of Al2O3. Pressure cycling does not have any influence on the final density of lead samples but becomes important for the mixture with Al2O3 leading to higher density and strength than static pressing for the same dwell time. This effect is enhanced with increasing Al2O3 percentage. The ejection force is higher after cyclic compaction at a given pressure level due to the higher density achieved.