High temperature shock consolidation of hard ceramic powders

Characterization of fine-grained W–10wt.% Cu composite fabricated by hot-shock consolidation

“…Besides preheating powders, the underwater shock wave has been considered as an effective way to eliminate the cracks [24]. Utilizing preheating of powders and underwater shock wave, even the diamond powders and c-BN powders can be consolidated [25][26][27][28]. For most of these researches, the powders were preheated by an external electric furnace, which was removed by a complex mechanical structure after the preheating process, then the preheating rate is less than 10°C/min, much lower than the rate of 10°C/s for chemical furnace utilized in this work.…”

Effect of particle size distribution on green properties during high velocity compaction

“…In addition, the localized heat generated by friction and deformation of particles does not have time to be evacuated, so that the softened phenomenon of the surface of particles occurs and the plastic deformation of particles will be easier. It was reported that the deformed powder Effect of particle size distribution on green properties during high velocity compaction particles surface would be changed to a softening or melting layer which enhances bonding between particles leading to the increase of green density [11]. As such, the phenomena of cold welding and mechanical interlocking among particles will appear as shown in Fig.…”

“…Concentration shock energy on fine particles having large surface area enables improvement of the condition of the bonding. This is because the energy given to the powder particles is dissipated at the surface areas leading to displacement and deformation [11]. Furthermore, high green density always generates high green strength.…”

The DCRS: Dynamic compaction resistance sintering. A flash sintering process with a dynamic loading ability

“…Powder consolidation techniques involving very high loads and/or high velocity loadings have also been developed such as explosive consolidation [4], falling ram compaction [5], or impact with a Split Hopkinson Pressure Bar (SHPB). The interest is that the deformation regime becomes adiabatic when high strain rates (ε > 10 2 s −1 ) are employed.…”