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.
J. Staniforth, Powder flow , in Pharmaceutics: The Science of Dosage Form Design (Ed. M. E. Aulton), 2nd ed., Churchill Livingstone, London 2002, pp. 197-210.
R. W. Heckel, Density-pressure relationship in powder compaction, Trans. Metal. Soc. AIME 221 (1961) 671-675.
R. W. Heckel, An analysis of powder compaction phenomena, Trans. Metal. Soc. AIME 221 (1961) 1001-1008.
K. Kawakita and K. H. Ludde, Some consideration of powdercompressionequations, Powder Tehnol. 4 (1971
Peter Peciar, Maroš Eckert, Roman Fekete and Viliam Hrnčiar
 GABAUDE, C., GUILLOT, M., GAUTIER, J.C.: Effects of true density, compacted mass, compression speed, and punch deformation on the mean yield pressure. Journal of Pharmaceutical Sciences, 88 , 1999, pp. 725-730
 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
 KAWAKITA, K.: Some considerations on powdercompressionequations. Powder Technology, 4 , 1971
Musiliu O. Adedokun, John O. Ayorinde and Michael A. Odeniyi
. 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 powdercompressionequations. 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, 1975.
26. Luangtana-Ana M, Fell J T.: Bonding mechanisms in tabletting. Int. J. Pharm., 60, 197, 1990.
27. Noyes A. A., Whitney W. R.: The
20. R. W. Heckel, An analysis of powder compaction phenomena, Trans. Metall. Soc. AIME 221 (1961a) 1001-1008.
21. R. W. Heckel, Density-pressure relationships in powder compaction, Trans. Metall. Soc. AIME 221 (1961b) 671-675.
22. E. E. Walker, The properties of powders VI: The compressibility of powders. Trans. Faraday Soc. 19 (1923) 73-82; DOI: 0.1039/tf9231900073.
23. K. Kawakita and K. H. Ludde, Some consideration on powdercompressionequations, Powder Technol. 4 (1971) 61-68; DOI: 10