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Fig. 1.2. Schematic representation depicting the effect of particle size on yield strength orfracture strength.

1.2.2 Characterisation of powder densificationThe determination of the densification behaviour of a powder is usually based on the

measurement of the relative density of the powder bed as a function of the pressure

necessary to obtain that relative density. Table 1.2 shows an overview of relationsused to describe the effect of the pressure on the degree of densification.

Mama collect these articles

Roberts, R.J., Rowe, R.C., The compaction of pharmaceutical and other model materials a pragmatic approach. Chem. Eng. Sci., 42(4) (1987) 903-911.

8 Roberts, R.J., Rowe, R.C., Brittle/ductile behaviour in pharmaceutical materials used in

tabletting.Int. J. Pharm., 36 (1987) 205-209.

9 Rowe, R.C., Roberts, R.J., Mechanical Properties, V. Effect of particle size-brittle/ductiletransitions. In: Alderborn, G., Nystrm, C. (Eds.),Pharmaceutical Powder Compaction

Technology. Marcel Dekker, New York (1996) 315-317.