Search Results

1 - 5 of 5 items :

  • "Powder compression equations" x
Clear All


Powder mixtures compaction behavior can be quantitatively expressed by densification equations that describe the relationship between densities - applied pressure during the compaction stages, using correction factors. The modelling of one phase (metal/ceramic) powders or two-phase metal-ceramic powder composites was studied by many researchers, using the most commonly compression equations (Balshin, Heckel, Cooper and Eaton, Kawakita and Lüdde) or relative new ones (Panelli - Ambrózio Filho, Castagnet-Falcão- Leal Neto, Ge Rong-de, Parilák and Dudrová, Gerdemann and Jablonski. Also, for a better understanding of the consolidation process by compressing powder blends and for better prediction of compaction behavior, it's necessary the modeling and simulation of the powder pressing process by computer numerical simulation. In this paper are presented the effect of ceramic particles additions in metallic matrix on the compressibility of composites made by P/M route, taking into account (a) the some of above mentioned powder compression equations and also (b) the compaction behavior modeling through finite element method (FEM) and discrete element modeling (DEM) or combined finite/ discrete element (FE/DE) method.

. Heckel, An analysis of powder compaction phenomena, Trans. Metal. Soc. AIME   221 (1961) 1001-1008. K. Kawakita and K. H. Ludde, Some consideration of powder compression equations, Powder Tehnol.   4 (1971) 61-68; DOI: 10.1016/0032-5910(71)80001-3. United States Pharmacopoeia 29, National Formulary 24 , USP Convention, Rockville 2006.

mass, compression speed, and punch deformation on the mean yield pressure. Journal of Pharmaceutical Sciences, 88 , 1999, pp. 725-730 [13] HAN, L.H., ELLIOT, J.A., BENTHAM, A.C., MILLS, A. AMIDON, G.E.: A modified Drucker-Prager Cap model for die compaction simulation of pharmaceutical powders. International Journal of Solid and Structures , 45 , 2008, pp. 3088-3106 [14] KAWAKITA, K.: Some considerations on powder compression equations. Powder Technology, 4 , 1971, pp. 61 [15] KIEKENS, F., DEBUNNE, A., VERVAET, C.: Influence of the punch diameter and curvature on

., Jaiyeoba K. T.: Sustained release of a water-soluble drug from directly compressed okra gum matrix tablets. East Central African J. Pharm. Sci. 9(2), 46, 2006. 23. Kalu, V.D., Odeniyi, M.A., Jaiyeoba, K. T. Matrix properties of a new plant gum in controlled drug delivery. Arch. Pharmacal Res., 30(7), 884, 2007. 24. Kawakita K., Lüdde K. H. Some considerations on powder compression equations. Powder Tech., 4, 61, 1970/71. 25. Kitazawa S., et al.: Effects of hardness on the disintegration and dissolution rate of uncoated caffeine tablets. J. Pharm. Pharmacol., 27(10), 765

.1039/tf9231900073. 23. K. Kawakita and K. H. Ludde, Some consideration on powder compression equations, Powder Technol. 4 (1971) 61-68; DOI: 10.1016/0032-5910(71)80001-3. 24. M. J. Adams, M. A. Mullier and J. P. K. Seville, Agglomerate strength measurement using a uniaxial confined compression test, Powder Technol. 78 (1994) 5-13; DOI: 140.1016/0032-5910(93)02777-8. 25. J. S. Smith, M. D. Wyrick and J. M. Poole, An evaluation of three techniques for determining Young’s modulus of mechanically alloyed materials. Dynamic Elastic Modulus Measurements in Materials, ASTM