A two-stage gas gun has been used to study the densification characteristics of dynamically shock compacted alumina-zirconia powder. We have determined that the particle size distribution of the powder has a significant effect on the extent of cracking which is observed in the recovered compacts. We have also determined that the final density which is achieved in the compacted specimens is strongly dependent upon the particle packing characteristics of the powder. We believe that the achievement of highly dense, crack-free dynamically compacted specimens is predicated on using shock pressures which are greater than the yield stress of the material and that the prevention of cracking at these pressures can only be achieved when a fine, uniform pore structure exists in the compacted specimen.
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