Explosive Compaction of Powders and Composites

Structure, phase content and mechanical properties of aluminium with hard particles after shock-wave compaction

“…It is pointed out that the pressure required for compaction of Al powder with regular particle size (<160 μm) and hardness Hv=100 is equal to 1 GPa (see Fig.3.13 in [10]). Some industrial explosives such as Ammonit-1, Carbonit [10], Uglenit [11] (see Table 1), do have required characteristics. Calculations performed using the formula [10] indicated that these values must be sufficient to obtain fully compacted material.…”

“…Some industrial explosives such as Ammonit-1, Carbonit [10], Uglenit [11] (see Table 1), do have required characteristics. Calculations performed using the formula [10] indicated that these values must be sufficient to obtain fully compacted material. Moreover, detonation rate calculation for a shock wave according to formula…”

Behavior of explosive compacted/consolidated of nanometric copper powders

“…One of such techniques is the dynamic compaction that uses shock waves (DC), generated from an explosive detonation or high velocity impact, to consolidate powders in order to produce bulk monolithic solids. This technology has already been used with considerable success in the compaction of some ceramic and intermetallic powders [6,7]. The DC characteristics, high pressure and high heating rate make it promising as a manufacture process appropriate to preserve the nanocrystallinity, by hindering the undesirable grain growth associated to conventional sintering processes [7,8].…”

Mechanically activated combustion synthesis and shockwave consolidation of magnesium silicide

“…There exists, however, an even faster method, shockwave consolidation, where also attainable pressures are much higher. Duringshockwave consolidation, densification and interparticle bonding occur so quickly that grain growth can be totally suppressed and the material retains its nano-or amorphous structure [40].…”