Pressability of refractory materials on hydrodynamic machines

Abstract

One of the most promising methods in the technology of ceramics and refractories is hydrodynamic pressing of powders, which uses the capacity of gunpowder when burned in a closed volume to develop a high pressure and create conditions for the multilateral compression of a liquid inside a thick-walled cylinder [I, 2]. The method is suitable for pressing various articles of complicated shape with high ratios of length to diameter, providing uniform distribution of density over the volume, which in the final account determines the quality of the finished article, and also makes it possible to eliminate the expensive power section of the equipment, simplify the production process, and increase productivity.According to the method of applying the load, the hydrodynamic pressing process differs substantially from known methods of static compaction of powders. These differences are due, primarily, to the high rate of increase and short duration of the application of the impulse pressure, the pulsating nature of the load, and the wave processes in the working chamber of the machine.